摘要
采用正交回归试验设计,研究了 N、K、Mg 肥用量和配比对甘蓝产量的影响,获得了相应的函数模型;通过微机对数学模型的优化和解析,得出甘蓝获得最高产量(111.89 t/hm2)时,尿素、硫酸钾、硫酸镁用量分别为 465.19、97.38、28.48 kg/hm2;3 种肥料的最佳施用量分别为 460.37、96.14、28.36 kg/hm2,此时,肥料成本投入为 818.98 元/hm2,施肥利润为 42895.59 元/hm2,产投比可达 52.4:1。
Effects of application rate and N:K:Mg ratio of the fertilizer on yield of ball cabbage were studied through experiment of quadratic orthogonal regression design. A relative function model was thus obtained. With the aid of computer, the model was optimized and parsed, showing that when the application rate of urea, K2SO4 and MgSO4 was 465.19, 97.38 and 28.48kg/hm2, respectively, the yield of ball cabbage was the highest (111.89 t/hm2), but the optimum application rate of urea, K2SO4 and MgSO4 was 460.37, 96.14 and 28.36kg/hm2, respectively, when the cost of fertilization would be 818.98 yuan/hm2, the profit 42,895.59 yuan/hm2 and the O/I 52.4:1.
出处
《土壤》
CAS
CSCD
北大核心
2004年第4期412-415,429,共5页
Soils
基金
安徽省"十五"科技攻关项目(01013014)资助课题
关键词
结球甘蓝
平衡施肥
数学模型
Ball Cabbage, Balanced fertilization, Mathematics model
