不同施氮量对棉花鲁棉338生长发育及产量的影响OA

In order to clarify the effects of different nitrogen application rates on the growth,development and yield of cotton,this study used Lumian 338 as the experimental material,adopted a single factor randomized block experimental design,set up five nitrogen application levels and explored the effects of different application levels on plant height,leaf SPAD value and yield of Lumian 338.The results showed that as the cotton growth process progressed,the plant height under different nitrogen application levels showed a gradually increasing trend;the SPAD value of cotton functional leaves under nitrogen application treatment was significantly higher than that under no nitrogen application treatment;the treatment with nitrogen application rate of 300 kg/hm2 and 400 kg/hm2 resulted in higher boll count per plant,weight per boll,seed cotton yield and lint yield.Overall,in the production of Lumian 338,the appropriate nitrogen application rate is 300 kg/hm2.