控失肥对棉花叶片光合特性及产量的影响

Effects of Loss-control Fertilizer on Photosynthetic Characteristics and Yield of Cotton

以常规施肥为对照,设计控失肥基施,后期追施2次速效肥料和后期追施1次速效肥料2种处理,研究等氮条件下不同控失肥处理对棉花光合特性及产量的影响。结果表明:与对照相比,2种控失肥处理均能保持生育后期有较高的叶面积,并能显著提高叶绿素含量、净光合速率、蒸腾速率和气孔导度,从而提高群体的光合能力。与对照相比,单株结铃数分别增加了5.32个和3.03个,皮棉产量分别提高12.02%、8.20%,均达极显著差异。而2个控失肥处理之间,后期追施2次速效肥料比后期追施1次速效肥料皮棉增产3.54%,差异显著。

compared with the routine fertilizers application method as control,the effect of loss-control fertilizer on photosynthesis and yield of cotton was studied under field conditions with two types of loss-control fertilizer, loss-control fertilizer as basal and first blooming and covered fat as topdressing,loss-control fertilizer as basal and peak blooming as topdressing. The results show that,compared with the ck,two kinds of loss-control fertilizer treatments remained higher LAI at later growing stage, significantly increased the content of chlorophyll, photo- synthetic rate,transpiration rates, stomata conductance（Cs）,thus improve photosynthetic rate at the community level. compared with the ck,the increased bolls per plant under two types of loss-control fertilizer are 5.32 and 3.03, and the lint cotton yields are increased by 12.02% and 8.20% under two types of loss-control fertilizer, loss-control fertilizer as basal and first blooming and covered fat as topdressing compared with loss-control fertilizer as basal and peak blooming as topdressing,lint cotton yield are increased by 3.54%.