摘要
通过17个大田试验,研究了湖北棉花钾肥施用效果及钾肥最佳用量。结果表明,适量施用钾肥棉花增产增收效果显著,16个试验施钾比不施钾增产子棉129～930kg/hm2,平均增产445kg/hm2,平均增产率为16.6%;施钾纯利润平均为2128元/hm2,产投比平均为4.55;钾肥偏生产力和农学利用率平均分别为22.77kg/kg(K2O)和2.74kg/kg(K2O)。根据线性加平台模型确定,棉花钾肥(K2O)最佳用量平均为61.8kg/hm2。
In 17 field trials, the effects of potassium （K） fertilization on yield, economic benefit, K use efficiency and optimum K recommendation rate of cotton in Hubei province were studied. The results indicated that the yield and profit of cotton significantly increased when K supplied adequately. Compared with the treatment without K fertilizer, K application increased the yield from 129 to 930 kg / hm2 for all sites except one site, which showed no effect when K fertilizer was applied. The average yield increased 445 kg / hm2 and the average increment rate of 16.6 percent for K application. The average net profit and the value cost ratio （VCR） of the K application treatment were 2 128 Yuan （RMB） / hm2 and 4.55, respectively. The average partial factor productivity of applied K（PFPK） and agronomic K use efficiency （AKUE） were 22.77 kg / kg（K2O） and 2.74 kg / kg（K2O）, respectively. According to linear plus platform model, the average optimum K application rate was 61.8 kg（K2O） / hm2 on cotton field in Hubei province.
出处
《湖北农业科学》
北大核心
2010年第6期1302-1306,共5页
Hubei Agricultural Sciences
基金
国家"十一五"科技支撑计划重点项目(2008BADA4B08)
教育部"新世纪优秀人才支持计划"项目(NECT-07-0345)
国家测土配方施肥项目
关键词
棉花
钾肥
产量
经济效益
适宜用量
cotton
potassium fertilizer
seed-cotton yield
profit
optimum K recommended rate
