【作者】 阮妙鸿；

【导师】 潘廷国； 柯玉琴；

【作者基本信息】 福建农林大学 ， 植物学， 2004， 硕士

【摘要】 烤烟是我省重要经济作物之一。烟叶高含量的钾、适宜的钙镁含量对烟叶品质有良好的作用。烟株的碳氮代谢的强弱和协调状况与烟叶的碳水化合物含量及含氮化合物含量关系密切，从而对烟叶产量和品质产生重大影响。本试验通过溶液培养研究了对照(CK)K：Ca：Mg=234：200：60(3.9：3.3：1)；处理1 K：Ca：Mg=351：100：12(29.3：8.3：1)；处理2 K：Ca：Mg=351：100：60(5.9：1.6：1)：处理3 K：Ca：Mg=468：240：12(39：20：1)；处理4 K：Ca：Mg=468：240：60(7.8：4：1)五个处理对烤烟K326吸收钾钙镁的规律和钾钙镁之间的相互作用，以及五个处理对烤烟碳氮代谢的影响。研究结果表明：随着钾钙镁水平的提高，烤烟的吸收量也加大：随着生育期推延烟叶中钾钙镁均降低。在处理4的钾钙镁比例下，钾钙镁之间表现出一种协同作用，使烟叶中钾钙镁含量达到了优质烟的要求。同时，在处理4下烤烟生长前期InV、SPS、SS活性较强，后期InV降低，而保持较高SS活性，使烟株在生长前期碳的分解代谢旺盛，提前进入旺长，后期碳的积累代谢强，积累较多的碳水化合物；总糖、还原糖和淀粉含量较高。在氮代谢方面，在旺长期有较强的NR和GS活性，在生长的后期NR和GS下降，使烟株在前期具有较强的氮代谢，有利营养体的建立，后期及时转向碳代谢：从而使烟叶中总氮和蛋白质含量降低，烟碱和氨基酸含量适当增加。本实验结果可为烤烟平衡施肥提供理论依据。更多还原

【Abstract】 Flue-cure tobacco is one of the important economic plants in FuJian province. The high content of potassium and proper content of calcium and magnesium in tobacco leaf have good effect on the quality of Flue-cure tobacco. The status of carbon metabolism and the harmony with nitrogen metabolism in Flue-cure tobacco correlate to the content of carbohydrate and nitrogenous compounds in Flue-cure tobacco leaf, therefore influencing greatly the production and quality of tobacco leaf. This experiment studies the rule of absorption K, Ca and Mg by Flue-cure tobacco K326 and the interaction among them by hydroponics experiment under 5 treatments(control(CK): K I Ca : Mg=234 : 200 : 60 (3.9 : 3.3 : l);treatmentl: K : Ca : Mg =351 : 100 : 12 (29.3 : 8.3 : 1); treatment K : Ca : Mg =351 : 100 : 60 (5.9 : 1.6 : 1); treament3 K : Ca : Mg=468 : 240 : 12 (39 I 20 : 1); treatment4 K : Ca : Mg=468 : 240 : 60 (7.8 : 4 : 1)), and the effect on carbon metabolism and nitrogen metabolism in Flue-cure tobacco as well. The study result indicates that with the level increasing of K, Ca and Mg, the absorption by Flue-cure tobacco also increase; with the growing of Flue-cure tobacco, the content of K, Ca and Mg in leaf decreases; There is a synergistic effect among K, Ca and Mg by treatment 4, which meets the high quality of Flue-cure tobacco owing to the content of K, Ca and Mg. Meanwhile, high activity of In V SPS and SS in leaves at the prophase of growth by treatment 4, and low InV activity at anaphase while keeping higher SS, which makes the carbon catabolism bloom at the prophase growth and tobacco grow fast ahead of time. Thecarbon accumulation metabolism increases and pool more carbohydrate atthe anaphase, and there are higher amount of total soluble sugar, reducing sugar and starch. As to nitrogen metabolism, NR and GS activity are higher at blooming phase, lower at anaphase of growth, which make the Flue-cure tobacco have stronger nitrogen metabolism at prophase and help build tobacco body, and turn to carbon metabolism at anaphase, thus make the amount of total nitrogen and protein drop, nicotine and amino increase appropriately.更多还原