[目的]研究氮素用量、运筹对钵形毯状秧苗机插水稻产量和氮肥吸收利用的影响。[方法]以中熟中粳品种连粳7号为供试材料，研究氮素用量、运筹对钵形毯状秧苗机插水稻产量结构、茎蘖动态、叶绿素含量和氮素吸收利用等的影响。[结果]施氮量为300 kg／hm2时，产量最高（11023．80 kg／hm2），并能获得较高的出糙率、谷草比和氮肥吸收利用率，过低施氮量处理不能获得高产，过高施氮量处理的氮素吸收利用率显著下降。[结论]钵形毯状秧苗机插连粳7号，在基蘖肥∶穗肥＝6．5∶3．5、施氮量为300 kg／hm2时产量和氮素吸收利用率最佳。%Objective] To analyze the effects of nitrogen application on the yield and nitrogen use efficiency of mechanically transplanted rice with pot-mat seeding.[Method] Late maturity and medium japonica rice lianjing No.7 were used as the study material,and the differences in yield structure,dynamic changes of stem and tillers,chlorophyll content and nitrogen use efficiency were investigated.[Results] The highest yield was 11 023.80 kg/hm2 as the nitrogen application was 300 kg/hm2 .Meanwhile,the roughness ratio,grain-straw ratio and nitrogen use efficiency remained at a higher level.Low nitrogen application could not obtain high yield.In contrast,too high nitrogen application leads to a significant decline in nitrogen use efficiency.[Conclusion] In view of high yield and nitrogen use efficiency,the nitrogen application at 300 kg/hm2 is the optimal value.
展开▼
机译：氮肥减量与底施运筹对油菜产量及氮素吸收利用的影响Effects of Nitrogen Fertilizer Reduction and Application of Nitrogen Fertilizer as Base Fertilizer on Rapeseed Yield and Nitrogen Absorption
