【摘要】 为探明马铃薯/玉米间作种植模式对作物生理生态特性的影响,为间作模式的进一步应用提供依据。以马铃薯/玉米间作为研究对象,分析间作对作物叶绿素、光合作用、作物水分特征以及生物量和产量的影响。结果表明:间作模式下各指标比单作模式均有所提高,叶绿素含量马铃薯和玉米分别提高1.7%～10.3%和8%～24.2%;马铃薯和玉米净光合速率、蒸腾强度、气孔导度、叶片水分利用效率分别提高1.8%、11.8%、22.2%、3.2%和3.0%、7.6%、9.2%、-6.6%,其中玉米叶片水分利用效率间作有所下降;马铃薯和玉米间作地上部分干重、产量较单作分别提高8.4%、13.8%和5.6%、9.5%;地下部根系干重则表现为单作显著高于间作,单作马铃薯、玉米分别较间作种植提高10.5%和25.1%。间作模式合理分配了土壤水分,马铃薯和玉米2种作物避开了需水高峰期,在干旱年份间作模式可有效提高作物抗旱和防灾减灾能力。更多还原

【Abstract】 In order to explore the effects of potato/maize intercropping model on crop physiological and ecological characteristics,and provide basis for further application of intercropping model,in this paper the authors analyzed the effects of intercropping model on chlorophyll content,photosynthesis,crop water characteristics,biomass and yield of potato and maize.Results:In comparison with single cropping model,all the indicators in the intercropping mode were improved.The chlorophyll content of potato and maize increased by 1.7%-10.3%and 8%-24.2%respectively,and the net photosynthetic rate,transpiration intensity,stomatal conductance and leaf water use efficiency of potato and maize increased by 1.8%,11.8%,22.2%,3.2%,and 3.0%,7.6%,9.2%,-6.6%,respectively.The leaf water use efficiency of maize decreased.The aboveground dry weight and yield of potato and maize increased by 8.4%,13.8%and 5.6%,9.5%,respectively.The underground dry weight dropped significantly.The underground dry weight of potato and maize in single cropping model increase by 10.5% and 25.1%.Intercropping mode reasonably distributes the soil moisture,and the two crops avoid the peak demand period,and the intercropping mode can effectively improve the drought resistance and disaster prevention and mitigation ability of crops.更多还原