论文部分内容阅读
本文通过田间试验研究了不同氮肥运筹对吉林省西部半干旱区覆膜玉米干物质积累量及产量的影响。结果表明,在覆膜的条件下,合理的氮肥后移能够增加干物质积累量和玉米产量,增加幅度为12.18%和12.75%,还能提高玉米氮肥农学效率和偏生产力,均提高了7.42 kg/kg。总施氮量为180 kg/hm2时,1/3 N作基肥施用、1/3 N在拔节期作追肥施用、1/6 N在抽雄期作追肥施用、1/6 N在灌浆期作追肥施用处理的产量最大为11 805 kg/hm2,并获得了最大干物质积累量和农学利用效率,为吉林省西部半干旱区覆膜玉米最佳氮肥运筹模式。
In this paper, field experiments were conducted to study the effects of different N application strategies on dry matter accumulation and yield of plastic mulched maize in the semiarid areas of western Jilin Province. The results showed that under the condition of film mulching, the rational nitrogen removal could increase the dry matter accumulation and corn yield by 12.18% and 12.75%, respectively, and also increase the agronomic efficiency and partial yield of nitrogen fertilizer by 7.42 kg / kg. When the total N application rate was 180 kg / hm2, 1 / 3N was applied as basal fertilizer, 1 / 3N was applied as topdressing at jointing stage, 1 / 6N was applied topdressing during tasseling stage, 1 / 6N was topdressing during grain filling stage The maximum yield of application treatment was 11 805 kg / hm2, and the maximum dry matter accumulation and agronomic efficiency were obtained, which was the optimal nitrogen fertilizer operation mode for plastic mulched maize in the semiarid areas of Jilin Province.