绵单一号玉米制种亩产250公斤综合栽培措施的数学模型研究

A STUDY ON MATHEMATICAL MODEL FORYIELD OVER 250 KG/MU OF MANDAN 1 HYBRID SEED CULTURAL PRACTICES

本试验采用五因素二次正交旋转组合设计,对玉米新组合绵单一号制种高产栽培综合农艺措施进行了研究,筛选出制种亩产250公斤以上的优化栽培模式918个。制种亩产大于250公斤的优化栽培方案为:4月3日播种,亩栽3600—3800株,底肥:硫酸锌亩施1.46公斤、有机肥(腐熟堆肥)亩施1800公斤、碳铵亩施21.53公斤,过磷酸钙亩施76.25公斤,氯化钾亩施15.25公斤;追肥:苗肥亩施碳铵21.53公斤,秆肥亩施碳铵21.53公斤,攻穗肥亩施碳铵43.06公斤。

The experiment was Conducted with the quadratic orth ogonal rotational Combination destgn to Study the mathematical medel for yield over 250 kg/mu of Mandan 1 Hybrid seed Cultural Practices, and 918 sets of Schemes were selected out, which made Manoan I Hybrid seed yield more than 250 kg/mu at 95% probability. The parameter of the scheme for 250 kg/mu were: Sowing time on April 3. 3600—3800 hills per mu for transplanting. The basal manure: ZnSO_4 13.5kg/mu. organic fertilizer 1800 kg/mu. ammonium carbonate 21.53kg/mu. superphosphate 76.25kg/mu. muriate of potash 15.25 kg/mu. The ammonium carbonate was used as topdressing at different stage: 'nurwery ferrtilizer' 21.53kg/mu. 'stalk fertilizerr' 21.53kg/mu. 'ear fertilizer' 43.06kg/mu.