摘要
开展了棉田肥料效应试验,设置了氮、磷、钾3因素4水平的田间试验。结果表明,在一定范围内施用肥料有显著的增产效果。其中氮肥增产效果最明显,增产子棉527 kg/hm2,增产率为18.3%,纯增收入1 770元/hm2;磷肥经济效益最佳,增产子棉453 kg/hm2,增产率为14.8%,纯增收入1 996元/hm2;钾肥增产子棉324 kg/hm2,增产率为10.4%,纯增收入323元/hm2。拟合一元二次肥料效应模型,并结合试验实际情况,确定江汉平原棉田推荐施肥量,氮、磷和钾的最高产量施用量分别为322、157和245 kg/hm2,最佳经济施用量分别为230、135和110 kg/hm2。
Studied the fertilization effects of cotton to provide scientific guidance to fertilization. Set up three factors（nitrogen,phosphorus and potassium）,4 levels and 10 treatments. The result showed that the economic benefit of phosphorus fertilization on cotton yield was the largest, the next was nitrogen fertilization and potassium fertilization was the smallest.The highest increment of nitrogen,phosphorus and potassium was separately 527,453 and 324 kg / hm^2, which were accordingly 18.3%,14.8% and 10.4% higher than the control. The net income of nitrogen, phosphorus and potassium was 1 770,1 996 and 323 kg / hm^2 respectively.According to the model of fertilizer effect, it would reach the highest yield when nitrogen,phosphorus and potassium application rate was 322 kg / hm^2,157 kg / hm^2 and 245 kg / hm^2, and the highest profit would be gotten when nitrogen,phosphorus and potassium application rate were 230 kg / hm^2,135 kg / hm^2 and 110 kg / hm^2.
出处
《湖北农业科学》
2015年第12期2850-2852,2916,共4页
Hubei Agricultural Sciences
基金
国家"十一五"科技支撑计划重点项目(2008BADA4B08)
现代农业产业技术体系建设专项(CARS-13)
