摘要
以宁夏中部干旱带旱地覆膜免耕冬麦栽培模式为研究对象,采用二次正交旋转设计,对栽培关键因子播种期、密度、氮磷肥用量及追肥时期进行计算机寻优模拟预测。结果表明,旱地冬麦覆膜免耕种植实现经济产量>2 250 kg/hm^2、籽粒蛋白质含量>15.5%、经济纯收益>5 250元/hm^2的优化组合方案为:播种期10月4~7日,播种密度298.5万~328.5万株/hm^2,氮肥施用量59.7~72.3 kg/hm^2,磷肥施用量78.6~94.5 kg/hm^2,追肥时期为3月20日~3月26日。
A Computer optimization simulation and prediction on the key factors in the cultivation of the dry land film-mulching no tillage winter wheat such as the sowing date,density,quality of nitrogen and phosphorus were carried out by using the quadratic rotation orthogonal design in the experiment. The results showed that in the middle arid zone of Ningxia,under the dry land film-mulching no tillage cultivation mode,for fulfilling the objectives of the yield of higher than 2 250 kg/hm^2,grain protein content of higher than 15.5% and economic returns of higher than 5 250 yuan/hm^2,the optimization agronomic scheme was that the sowing date should be October 4 th to 7 th,the sowing density should be 2.985~3.285 million plants/hm^2, the application rate of the nitrogen should be 59.7~72.3 kg/hm^2, the phosphorus should be 78.6~94.5 kg/hm^2, the topdressing fertilizer stage should be March 20 th to 26 th.
出处
《宁夏农林科技》
2017年第12期4-6,共3页
Journal of Ningxia Agriculture and Forestry Science and Technology
关键词
覆膜免耕
冬麦
栽培模式
Film-mulching no tillage
Winter wheat
Cultivation mode
