【作者】 郑成岩；

【导师】 于振文； 王东；

【作者基本信息】 山东农业大学 ， 作物栽培学与耕作学， 2011， 博士

【摘要】 1耕作方式和土壤水分对小麦耗水特性和产量形成的影响以高产中筋小麦品种济麦22为试验材料,在山东省兖州市小孟镇史王村大田进行定位试验。2007~2008生长季设置5种耕作方式:条旋耕、深松+条旋耕、旋耕、深松+旋耕、翻耕,本试验于2008~2009和2009~2010小麦生长季在2007~2008生长季的试验区内设置同一处理,“深松+条旋耕”和“深松+旋耕”处理不再深松,分析土壤经一次深松耕作后对小麦籽粒产量和水分利用效率影响的后效,降低机械作业成本。设置5个水分处理:不灌水(W0),灌水后播种、越冬、拔节和开花期0~140 cm土层土壤相对含水量在2008~2009小麦生长季分别达到80%、80%、75%和75% (W1),80%、85%、75%和75% (W2),85%、80%、75%和75% (W3),85%、85%、75%和75% (W4);在2009~2010小麦生长季分别达到85%、85%、70%和75% (W’1),85%、90%、70%和75% (W’2),85%、85%、75%和75% (W’3),85%、90%、75%和75% (W’4)。研究耕作方式和土壤水分对小麦耗水特性和碳氮代谢及产量的影响。1.1耕作方式和土壤水分对小麦耗水特性的影响1.1.1不同土壤水分条件下耕作方式对小麦耗水特性的影响同一水分条件下,深松+条旋耕的总耗水量低于深松+旋耕,灌水量低于深松+旋耕和翻耕处理,土壤耗水量占总耗水量的比例高于翻耕、旋耕和条旋耕处理。深松+条旋耕处理播种至越冬阶段的耗水量与条旋耕无显著差异,低于其他耕作处理,在开花至成熟阶段的耗水量和耗水模系数均高于条旋耕、旋耕和翻耕。深松+条旋耕各生育时期的棵间蒸发量低于深松+旋耕和翻耕处理。表明在一年深松耕作基础上,连续两年条旋耕播种处理减少了灌水量,促进了小麦对土壤贮水的利用,农田耗水量、播种至越冬阶段的耗水量和棵间蒸发量较低,开花至成熟阶段的耗水模系数最高,有利于降低小麦生育前期的水分消耗,促进开花后对水分的利用。1.1.2不同耕作方式条件下土壤水分对小麦耗水特性的影响同一耕作方式下,全生育期不灌水处理总耗水量最低,其总耗水量来源于降水量和土壤耗水量的比例最高,棵间蒸发量和拔节至成熟阶段的耗水量低于灌水处理,表明W0处理减少了小麦生育期水分向大气中的耗散,有利于小麦对土壤水分的利用。灌水处理之间比较,W3和W’3的总耗水量、灌水量及其占总耗水量的比例分别低于W4和W’4处理,土壤耗水量占总耗水量的比例与W2和W’2无显著差异,高于W4和W’4处理,其开花至成熟阶段的耗水量及其耗水模系数最高。表明在本试验条件下,播种期0~140 cm土层土壤相对含水量为85%,越冬期不灌水,拔节和开花期0~140 cm土层土壤相对含水量分别为75%和75%的W3和W’3处理的总耗水量、越冬至拔节阶段的棵间蒸发量和耗水模系数低于越冬期灌水处理,其土壤耗水量较高,开花至成熟阶段的耗水量及其耗水模系数最高,有利于小麦开花后对水分的利用。1.2耕作方式和土壤水分对小麦生理特性和干物质积累与分配的影响1.2.1不同土壤水分条件下耕作方式对小麦生理特性和干物质积累与分配的影响同一水分条件下,深松+条旋耕和深松+旋耕在灌浆中后期的旗叶水势高于其他处理,其旗叶光合速率和叶片水分利用效率在灌浆中后期高于翻耕处理且两者无显著差异,条旋耕和旋耕在灌浆中后期的旗叶光合速率和叶片水分利用效率低于翻耕处理。深松+条旋耕在灌浆初期和中期的旗叶SPS活性和蔗糖含量显著高于翻耕处理;灌浆后期的旗叶蔗糖含量低于深松+旋耕和翻耕处理,有利于灌浆阶段旗叶中蔗糖的积累及向籽粒中的转运。深松+条旋耕和深松+旋耕处理开花后干物质积累量、成熟期籽粒的干物质分配比例和开花后干物质同化量对籽粒的贡献率高于条旋耕、旋耕和翻耕处理,翻耕的茎秆+叶鞘+叶片的干物质分配比例高于深松+条旋耕和深松+旋耕处理。以上结果表明,在一年深松耕作基础上,连续两年条旋耕播种处理提高了开花后干物质的积累能力,增加了籽粒中来自开花后干物质的比例,这是深松+条旋耕处理获得高产的生理基础。1.2.2不同耕作方式条件下土壤水分对小麦生理特性和干物质积累与分配的影响同一耕作方式下,全生育期不灌水处理在开花后的旗叶光合速率、蒸腾速率、Fv/Fm、ΦPSII、SPS活性、干物质积累量均低于灌水处理,籽粒干物质分配比例最高。表明干旱条件下,小麦的物质生产能力降低,促进了成熟期干物质向籽粒中的分配。灌水处理之间比较,W3、W4和W’3、W’4的旗叶光合速率在灌浆中后期均高于其他处理,W3和W’3的旗叶蒸腾速率在灌浆后期低于W4和W’4处理。W3和W’3处理在开花期和成熟期的干物质积累量较高,籽粒干物质分配比例高于W4和W’4,开花后干物质同化量对籽粒的贡献率与W4和W’4无显著差异均高于其他处理。2008~2009生长季,W3和W4在灌浆中后期的旗叶水势和根系活力高于W2和W1处理,其开花至花后21天旗叶的SPS活性和蔗糖含量最高,W3的花后28天的旗叶蔗糖含量低于W4处理,有利于蔗糖向籽粒中的转运。以上结果表明,播种期0~140 cm土层土壤相对含水量为85%,越冬期不灌水,拔节和开花期0~140 cm土层土壤相对含水量分别为75%和75%的W3和W’3处理有利于小麦开花后保持较高的物质生产能力,延缓了旗叶的衰老,提高花后光合产物向籽粒中的转运。1.3耕作方式和土壤水分对小麦植株氮素吸收、转运和分配的影响1.3.1不同土壤水分条件下耕作方式对小麦植株氮素吸收、转运和分配的影响同一水分条件下,深松+条旋耕和深松+旋耕在开花和成熟期的植株氮素积累量、成熟期籽粒的氮素积累量和分配比例均高于条旋耕和旋耕处理,茎鞘+叶片的分配比例低于上述处理,有利于小麦植株氮素的积累及其向籽粒中的分配。成熟期,深松+条旋耕的0~80 cm各土层的土壤硝态氮含量低于条旋耕、旋耕和翻耕处理,在120~140 cm各土层低于深松+旋耕。以上结果表明,在一年深松耕作基础上,连续两年条旋耕播种处理有利于小麦营养器官氮素在开花期和成熟期的积累,减少了开花前营养器官氮素向籽粒中的转运,其成熟期土壤硝态氮在深层土壤的积累量低于深松+旋耕处理,获得高的氮素吸收效率和氮肥生产效率。1.3.2不同耕作方式条件下土壤水分对小麦植株氮素吸收、转运和分配的影响同一耕作方式下,全生育期不灌水处理植株氮素在开花期和成熟期的积累量、成熟期穗轴+颖壳和茎鞘+叶片氮素积累量均低于灌水处理,营养器官氮素向籽粒中的转移率及其对籽粒的贡献率高于灌水处理。成熟期,全生育期不灌水的0~60 cm土层土壤的硝态氮含量高于灌水处理,140~200 cm土层土壤的硝态氮含量低于灌水处理。灌水处理之间比较,开花期和成熟期的植株氮素积累量随灌水量的增加而增加,营养器官氮素向籽粒中的转移率及其对籽粒的贡献率降低。在条旋耕条件下,W3和W2的氮素在籽粒中的分配比例低于W1,高于W4处理;在深松+条旋耕、旋耕和翻耕条件下,W3和W1的氮素在籽粒中的分配比例高于W2和W4处理;在深松+旋耕条件下,W3的氮素在籽粒中的分配比例高于W4、W2和W1处理。W3处理上层土壤的硝态氮含量低于W1和W2,W4处理在100~140 cm土层出现积累峰。以上结果表明,播种期0~140 cm土层土壤相对含水量为85%,越冬期不灌水,拔节和开花期0~140 cm土层土壤相对含水量分别为75%和75%的处理有利于小麦开花和成熟期植株氮素积累量的增加和成熟期氮素向籽粒中的转运,该处理促进了小麦对40~120 cm以上土层土壤氮素的吸收利用,硝态氮向140~180 cm土层土壤淋溶量低于W4处理,有利于氮素吸收效率和氮肥生产效率的提高。1.4耕作方式和土壤水分对小麦籽粒产量、品质和水分利用效率的影响1.4.1不同土壤水分条件下耕作方式对小麦籽粒产量、品质和水分利用效率的影响同一水分条件下,深松+条旋耕和深松+旋耕处理的籽粒产量最高且两者无显著差异,深松+条旋耕的水分利用效率和灌溉效益高于其他处理。翻耕的籽粒产量在不灌水条件下与旋耕无显著差异高于条旋耕处理;在灌水条件下高于旋耕和条旋耕处理。深松+条旋耕的蛋白质含量、湿面筋含量、面团形成时间和面团稳定时间高于翻耕处理。以上结果表明,在一年深松耕作基础上,连续两年条旋耕播种处理有利于籽粒产量和水分利用效率的同步提高,其蛋白质含量、湿面筋含量、面团形成时间和面团稳定时间较高。1.4.2不同耕作方式条件下土壤水分对小麦籽粒产量、品质和水分利用效率的影响同一耕作方式下,全生育期不灌水的籽粒产量低于灌水处理。W0的水分利用效率在条旋耕条件下高于W3和W’3处理;在旋耕条件下与W3和W’3处理无显著差异;在深松+条旋耕、深松+旋耕和翻耕条件下低于W3和W’3处理。W0的蛋白质含量、湿面筋含量、面团形成时间和面团稳定时间高于灌水处理。灌水处理之间比较,W3和W’3的籽粒产量与W4和W’4处理无显著差异高于其他处理,水分利用效率分别高于W2、W4和W’2、W’4处理,两处理的灌溉效益最高。W4的面团稳定时间、蛋白质含量和湿面筋含量最低。以上结果表明,播种期0~140 cm土层土壤相对含水量为85%,越冬期不灌水,拔节和开花期0~140 cm土层土壤相对含水量分别为75%和75%的处理灌溉效益和籽粒产量最高,获得较高水分利用效率,其面团稳定时间、蛋白质含量和湿面筋含量高于W4处理。在一年深松耕作基础上,连续两年采用条旋耕播种方式下播种期0~140 cm土层土壤相对含水量为85%,越冬期不灌水,拔节和开花期0~140 cm土层土壤相对含水量分别为75%和75%的处理是本试验条件下节水高产的最优处理。2灌水方式对小麦耗水特性和产量形成的影响以高产中筋小麦品种济麦22为试验材料,于2009~2010小麦生长季在山东省兖州市小孟镇史王村大田进行试验。以不灌水处理为对照(I0),设置微喷管喷灌和浇灌两种灌水方式,拔节期和开花期0~140 cm土层达到的目标相对含水量分别为70%和70%(I1和I2),75%和75%(I3和I4),研究了不同灌水方式对小麦耗水特性和产量形成的影响。2.1灌水方式对小麦耗水特性的影响不灌水的土壤耗水量占总耗水量的比例显著高于灌水处理,拔节至开花和开花至成熟阶段的耗水模系数最低。灌水处理之间比较,随拔节和开花期土壤相对含水量的提高,总耗水量和拔节至开花阶段的耗水量和耗水模系数增加,灌水量及其占总耗水量的比例提高。喷灌处理土壤耗水量占总耗水量的比例、开花至成熟阶段的耗水模系数和60~140 cm土层土壤贮水的消耗量高于浇灌处理,其开花和灌浆期的棵间蒸发量低于浇灌处理。表明喷灌处理减少了小麦生育期的灌水量,提高了60~140 cm土层土壤贮水的消耗和开花至成熟阶段的耗水量,有利于小麦开花后对水分的利用,降低开花后的棵间蒸发损失。2.2灌水方式对小麦光合速率和干物质积累与分配的影响不灌水处理的光合速率在开花后均低于灌水处理,其开花后干物质积累量和开花后干物质积累量对籽粒的贡献率最低。灌水处理间比较,随着土壤相对含水量的增加,小麦开花后干物质积累量及其对籽粒的贡献率提高。喷灌处理灌浆后期旗叶光合速率、开花后干物质积累量和开花后干物质积累量对籽粒的贡献率高于浇灌处理。表明喷灌处理有利于小麦开花后干物质的积累及其向籽粒中的转运。2.3灌水方式对小麦植株氮素积累与分配的影响不灌水处理在开花和成熟期的氮素积累量、营养器官氮素向籽粒中的转移量和转移率均低于灌水处理。灌水处理间比较,随着土壤相对含水量的增加,开花和成熟期的氮素积累量提高,营养器官氮素向籽粒中转移率和营养器官氮素转移量对籽粒的贡献率降低。喷灌处理成熟期氮素积累量、营养器官氮素向籽粒中转移量和转移率高于浇灌处理。2.4灌水方式对小麦籽粒产量、水分和氮素利用效率的影响不灌水处理的农田耗水量、籽粒产量和氮素吸收效率均低于灌水处理,氮素利用效率高于灌水处理,水分利用效率与I1无显著差异,低于其他灌水处理。灌水处理间比较,随着土壤相对含水量的增加,籽粒产量、水分利用效率和氮素吸收效率提高,氮素收获指数降低。在拔节期和开花期土壤相对含水量分别为75%和75%条件下,喷灌处理有利于籽粒产量、水分和氮素利用效率的提高,是本试验条件下的最优灌溉处理。更多还原

【Abstract】 1 Effects of tillage and soil moisture on water consumption characteristics and yield formation of wheatThe field fixed position experiment was conducted with high-yield medium-gluten winter wheat cultivar Jimai 22 in Shiwang village (35.41°N, 116.41°E), Yanzhou, Shandong, China. The five tillage practice treatments which were strip rotary tillage (SR), strip rotary tillage after subsoiling (SRS), rotary tillage (R), rotary tillage after subsoiling (RS) and plowing tillage (P) respectively, were designed and conducted on the same experimental plots during 2007~2010 growth seasons. However, SRS and RS were no longer subsoiling during 2008~2009 and 2009~2010 wheat growth seasons. This paper analyzes the results of two wheat growth seasons from 2008 to 2010, in order to verify the effects of the subsoiling during the first year on grain yield and water use efficiency. The soil moisture treatments were no irrigation (W0), in 2008~2009, 80% of relative soil moisture content in 0~140 cm soil layers at sowing, 80% at prewintering, 75% at jointing and 75% at anthesis (W1); 80% at sowing, 85% at prewintering, 75% at jointing and 75% at anthesis (W2); 85% at sowing, 80% at prewintering, 75% at jointing and 75% at anthesis (W3); 85% at sowing, 85% at prewintering, 75% at jointing and 75% at anthesis (W4);in 2009~2010, 85% at sowing, 85% at prewintering, 70% at jointing and 75% at anthesis (W’1); 85% at sowing, 90% at prewintering, 70% at jointing and 75% at anthesis (W’2); 85% at sowing, 85% at prewintering, 75% at jointing and 75% at anthesis (W’3); 85% at sowing, 90% at prewintering, 75% at jointing and 75% at anthesis (W’4). The object of this study was to discover the effects of tillage practice and soil moisture on water consumption characteristics, carbon and nitrogen metabolism and grain yield in wheat. The results were as follows:1.1 Effects of tillage and soil moisture on water consumption characteristics1.1.1 Effects of tillage on water consumption characteristics in different soil moisture The total amount of water consumption in SRS was lower than that in RS treatment, the irrigation amount was lower than that in RS and P treatments, but the ratio of the amount of soil water consumption to the amount of total water consumption was higher than that in P, SR and R treatments. SRS treatment had lower soil evaporation at every stage in wheat growth season, the amount of water consumption during sowing - prewintering was lower than that in P, RS and R treatment, and there was no significant difference between SRS and SR treatment. The amount and the percentage of water consumption during anthesis - maturity in SRS treatment were higher than those in P, SR and R treatments. The results suggested that the SRS treatment which was strip rotary in 2008~2010 after once subsoiling in 2007~2008 decreased the amount of irrigation but increased the amount of soil water consumption. The amount of water consumption during sowing - prewintering and soil evaporation were lower, the amount of water consumption during anthesis - maturity was greatest, which was benefit for wheat to decrease water consumption at early stage, and increase water absorption after anthesis.1.1.2 Effects of soil moisture on water consumption characteristics under different tillage practicesThe total amount of water consumption in W0 treatment was the lowest, the ratio of precipitation and the ratio of the amount of soil consumption to total amount of water consumption in W0 treatment were greatest. The soil evaporation and the amount of water consumption during jointing - maturity in W0 treatment were lower than those in the other treatments. The results indicate that W0 treatment decreased soil evaporation, and promoted the use of stored soil water by wheat.In W3 and W’3 treatments, the amount and percentage of water consumption during anthesis - maturity were greatest, the amount of irrigation and its ratio to total amount of water consumption and the total amount of water consumption were lower than those in W4 and W’4 treatments. However, the ratio of the amount of soil water consumption to the total amount of water consumption was higher than that in W4 and W’4 treatments, and there was no significant difference between W3 and W2, and W’3 and W’2 treatments. It suggested that W3 and W’3 treatments which the relative soil moisture content in 0~140 cm soil layers was 85% at sowing, no irrigation at prewintering, 75% at jointing and 75% at anthesis stage achieved lower total water consumption, consumption percentage and soil evaporation during prewintering - jointing, compared to those in the treatments which were irrigated at the prewintering stage. The amount of water consumption during anthesis - maturity in W3 and W’3 treatments was greatest. It was encouraged to higher water absorption by the wheat after anthesis.1.2 Effects of tillage and soil moisture on physiological characteristics and the accumulation and distribution of dry matter in wheat1.2.1 Effects of tillage on physiological characteristics and the accumulation and distribution of dry matter in different soil moisture The flag leaf water potential, photosynthetic rate and leaf water use efficiency in SRS andRS treatments were greatest during middle and late grain filling stage, which was followed by those in P treatment, but those in SR treatment were the lowest. The sucrose phosphate synthase activity and sucrose content of flag leaf in SRS treatment were higher than those in P treatment at early and middle grain filling stages. However sucrose content was lower than that in RS and P treatments at late grain filling stage, which in turn improved the accumulation of sucrose in grain and the translocation of sucrose from flag leaf to grain. The accumulation of dry matter after anthesis and its contribution ratio to grain, and dry matter distribution in grain at maturity in SRS and RS treatments were higher than those in the other treatments. Dry matter distribution in stem+sheath+leaf in P treatment at maturity was higher than that in SRS and RS treatments. The results suggested that the SRS treatment which was strip rotary in 2008~2010 after once subsoiling in 2007~2008 improved the accumulation of dry matter after anthesis and its distribution ratio to grain, which was the physiological basis of high-yield in the SRS treatment.1.2.2 Effects of soil moisture on physiological characteristics and dry matter accumulation and distribution under different tillage practicesThe photosynthetic rate, transpiration rate, Fv/Fm,ΦPSII, SPS activity and the amount of dry matter accumulation in the W0 treatment were lower than those in the irrigated treatments, while its dry matter distribution ratio in grain was greatest. In this way, the production of dry matter was decreased and the distribution of dry matter to grain at maturity was encouraged in drought conditions.The photosynthetic rate during the middle and late grain filling stages in the W3, W4 and W’3, W’4 treatments were greatest. The transpiration rate at the late grain filling stage in the W3 and W’3 treatments was lower than that in the W4 and W’4 treatments. The amount of dry matter accumulation after anthesis and its contribution ratio to the grain, and dry matter distribution to grain in the W3 and W’3 treatments were higher than those in the W4 and W’4 treatments. In 2008~2009 growth season, the flag leaf water potential, root activity, SPS activity and sucrose content during 7 d - 28 d after anthesis in the W3 and W4 treatments were higher than those in the W1 and W2 treatments. However, the sucrose content at 28 d after anthesis in the W3 treatment was lower than that in the W4 treatment, which were facilitated to the translocation of sucrose from flag leaf to grain. The results indicated that the W3 and W’3 treatments where the relative soil moisture content in 0~140 cm soil layers was 85% at sowing, no irrigation at prewintering, 75% at jointing and 75% at anthesis stage were beneficial for maintaining the ability to produce a high level of dry matter, delaying flag leaf senescence, and improving dry matter translocation to grain after anthesis. 1.3 Effects of tillage and soil moisture on nitrogen accumulation, translocation and distribution in wheat1.3.1 Effects of tillage on nitrogen accumulation, translocation and distribution in different soil moistureThe amount of nitrogen accumulation at anthesis and maturity, the amount of grain nitrogen accumulation and the distribution ratio of grain nitrogen in the SRS and the RS treatments were higher than those in the SR and the R treatments. However, the nitrogen translocation efficiency from vegetative organs to grain and its contribution proportion in the SRS and the RS treatments were lower than those in the SR and the R treatments. At maturity, the content of NO3––N in 0~80 cm soil layers in the SRS treatment was lower than that in the SR, R and P treatments, and was also lower than that in 120~140 cm soil layers in RS treatment. The results suggested that the SRS treatment which was strip rotary in 2008~2010 after once subsoiling in 2007~2008 encouraged higher nitrogen accumulation at anthesis and maturity, and increased nitrogen uptake efficiency and nitrogen production efficiency, decrease nitrogen translocation from vegetative organs to grain, while the nitrate nitrogen residual in deep soil layers was lower than that in the RS treatment.1.3.2 Effects of soil moisture on nitrogen accumulation, translocation and distribution under different tillage practicesThe amount of nitrogen accumulation in the plant after anthesis and that in spike axis+glume and sheath+stem+leaf at maturity in the W0 treatment were lower than those in the treatments with irrigation, the efficiency of nitrogen translocation from vegetative organs to grain and its contribution proportion were higher than those in the treatments with irrigation. At maturity, the content of NO3––N in 0~60 cm soil layers was higher, but in 140~200 cm soil layers it was lower than in the treatments with irrigation.With the amount of irrigation increased, the amount of nitrogen accumulation in the wheat plant at anthesis and maturity increased, but the efficiency of nitrogen translocation from vegetative organs to grain and its contribution proportion decreased. Under the conditions of the SR treatment, the ratio of nitrogen distribution in grain in the W3 and the W2 treatments were lower than that in the W1 treatment, but higher than that in the W4 treatment. The ratio of nitrogen distribution in grain in the W3 and the W1 treatments were higher than that in the W2 and the W4 treatments under the conditions of the SRS, R and P treatments. That in the W3 treatment was higher than that in the W4, W2 and W1 treatments under the conditions of the RS treatment. The NO3––N content in the W3 treatment was lower than that in the W1 and the W2 treatments. The nitrate nitrogen residual in 100~140 cm soil layers in the W4 treatment was greatest. The results indicated that the W3 treatment which the relative soil moisture content of 0~140 cm soil layers was 85% at sowing, no irrigation at prewintering, 75% at jointing and 75% at anthesis was beneficial to increase the amount of nitrogen accumulation in the plant at anthesis and maturity and the efficiency of nitrogen translocation from vegetative organs to grain. The W3 treatment improved the utilization of soil nitrogen in the 40~120 cm soil layers, the efficiency of nitrogen uptake and the efficiency of nitrogen production, decreased the content of NO3––N in the 140~180 cm soil layers, compared to that in the W4 treatment.1.4 Effects of tillage and soil moisture on grain yield, quality and water use efficiency in wheat1.4.1 Effects of tillage on grain yield, quality and water use efficiency in different soil moistureThe water use efficiency and irrigation benefit were greatest in the SRS treatment. There was no significant difference on grain yield between the SRS and the RS treatments. However, the grain yield of the SRS and the RS treatments was higher than that of the other treatments. There was no significant difference on grain yield between the P treatment and the R treatment when there was no irrigation, but the grain yield of the P treatment was higher than that of the R treatment under irrigation condition. The grain yield of the SR treatment was the lowest of all the treatments. The protein content, wet gluten content, dough development time and the dough stability time of the SRS and the RS treatments were higher than those of the P treatment. The results suggested that the SRS treatment which was strip rotary in 2008~2010 after once subsoiling in 2007~2008 was favorable to increase the grain yield and water use efficiency at the same time. The grain quality of the SRS treatment was also superior to that of the P treatment.1.4.2 Effects of soil moisture on grain yield, quality and water use efficiency under different tillage practicesThe grain yield of the W0 treatment was lower than that of the treatments with irrigation. However, the protein content, wet gluten content, dough development time and dough stability time of the W0 treatment were higher than that of the treatments with irrigation. Compared with the W3 and the W’3 treatments, water use efficiency of the W0 treatment was higher in the SR system, but was lower in the SRS, RS and P systems, and there was no significant difference in the R system.The irrigation benefit of W3 and W’3 treatments was highest. There was no significant difference on grain yield between the W3 and W4, and W’3 and W’4 treatments, but higher than the other treatments. The water use efficiency of the W3 treatment was higher than that of the W2 and the W4 treatments, as well, the water use efficiency of the W’3 treatment was higher than that of the W’2 and the W’4 treatments. The W4 treatment with the most irrigation achieved the lowest protein content, wet gluten content, dough development time and dough stability time. The results indicated that the W3 treatment which the relative soil moisture content of 0~140 cm soil layers was 85% at sowing, no irrigation at prewintering, 75% at jointing and 75% at anthesis stage achieved the greatest irrigation benefit and grain yield, and higher water use efficiency. The protein content, wet gluten content, dough development time and dough stability time of the W3 treatment were higher than those of the W4 treatment.Therefore, we recommend that the most appropriate treatment for high-yielding and water-saving production of wheat was the SRS– W3 and SRS– W’3 treatments with strip rotary for two years after once subsoiling, and 85% of relative soil moisture content in the 0~140 cm soil layers at sowing, no irrigation at prewintering, 75% of relative soil moisture content in the 0~140 cm soil layers at jointing and 75% of relative soil moisture content in the 0~140 cm soil layers at anthesis.2 Effects of irrigation methods on water consumption characteristics and yield formation of wheatThe field experiment was conducted with high-yield and medium-gluten winter wheat cultivar Jimai 22 in Shiwang village (35.41°N, 116.41°E), Yanzhou, Shandong, China in 2009~2010 growing season. The control treatment expressed as I0 irrigated no water, and two irrigation methods were designed,i. e., border flooding irrigation (I1 and I3);sprinkler irrigation (I2 and I4). Two relative soil moisture contents in each irrigation regime were designed to investigate the effects of irrigation methods and soil moisture on water consumption characteristics and grain yield in wheat.2.1 Effects of irrigation methods on water consumption characteristicsThe percentage of water consumption during jointing - maturity of the I0 treatment was significantly lower than that of the irrigated treatments, while the ratio of the amount of soil water to the amount of the total water consumption in the I0 treatment was higher than that in the irrigated treatments. The amount of total water consumption, the amount and the percentage of the water consumption during jointing - anthesis and the ratio of the amount of irrigation to the total amount of water consumption increased with the relative moisture content at jointing and anthesis stage increased. The ratio of the amount of soil water consumption to the total amount of water consumption, the percentage of the water consumption during anthesis - maturity and the amount of soil water consumption from the 60~140 cm soil layers in the sprinkler irrigation treatments were higher than those in the border flooding irrigation treatments. However the soil evaporation at anthesis and grain filling stage in the sprinkler irrigation treatments were lower than those in the border flooding irrigation treatments. The results indicated that the sprinkler irrigation reduced the amount of irrigation, increased the amount of the soil water consumption from the 60~140 cm soil layers and the amount of soil water consumption during anthesis - maturity, which was favorable to increase the water absorption by wheat after anthesis, and decrease soil evaporation.2.2 Effects of irrigation methods on photosynthetic rate and the accumulation and distribution of dry matterThe photosynthetic rate after anthesis in the I0 treatment was significantly lower than that in the irrigated treatments. The amount of dry matter accumulation after anthesis and the contribution of dry matter assimilated after anthesis to grain were the lowest. The amount of dry matter accumulation after anthesis and its contribution to grain increased with the relative moisture content at jointing and anthesis stage increased. The photosynthetic rate at late grain filling stage, the amount of dry matter accumulation after anthesis and its contribution to grain in sprinkler irrigation treatments were higher than those in border flooding irrigation treatments. The results suggested that sprinkler irrigation encouraged an increase in the amount of dry matter accumulation and its translocation to grain after anthesis.2.3 Effects of irrigation methods on nitrogen accumulation and distributionThe amount of nitrogen accumulation in plant at anthesis and maturity, the amount and the efficiency of nitrogen translocation from vegetative organs to grain in the I0 treatment were significantly lower than those in the irrigated treatments. However the ratio of nitrogen distributed to grain in the I0 treatment was greatest. The amount of nitrogen accumulation at anthesis and maturity increased, but the ratio of nitrogen translocated to grain and the contribution proportion of translocated nitrogen decreased when the relative moisture content at jointing and anthesis was increased. The amount of nitrogen accumulation at maturity, the amount and the efficiency of nitrogen translocation from vegetative organs to grain in sprinkler irrigation treatments were higher than those in the border flooding irrigation treatments. 2.4 Effects of irrigation methods on grain yield, water and nitrogen use efficiencyThe amount of water consumption, grain yield and nitrogen uptake efficiency were the lowest but nitrogen use efficiency was greatest in I0 treatment. There was no significant difference in water use efficiency between the I0 treatment and the I1 treatment. However, the water use efficiency of the I0 and the I1 treatments was lower than that of the other treatments. The grain yield, water use efficiency and nitrogen uptake efficiency increased while the nitrogen harvest index decreased with the relative moisture content increased. Considering the balance of grain yield, water and nitrogen use efficiency, the appropriate treatment under these research conditions was the I4 treatment with sprinkler irrigation, and 75% of the relative soil moisture content in the 0~140 cm soil layers at jointing and anthesis.更多还原