巴西旱稻高产栽培数学模型及其应用

High Yield Cultivation Mathematical Model and its Application on the Brazil Dry Rice

应用 “416- A”最优混合设计, 对巴西旱稻进行试验研究, 建立以巴西旱稻产量为目标函数, 以种植密度、施氮量、施磷量、施钾量为决策变量的高产栽培数学模型, 用电子计算机进行分段寻优, 获得巴西 旱稻高、中、低优化栽培方案。1998年在广西大化县进行了巴西旱稻示范101.6hm 2 ,平均产量为3 813.0 kg/hm 2; 验证6.0 hm 2 , 平均产量为4 752.0 kg/hm 2 。而水稻常规栽培产量仅有3 550.5 kg/hm 2 。因此, 每公顷巴西旱稻比常规习惯栽培的水稻增产262.5～1 201.5 kg, 增幅7.4% ～33.8% 。每公顷增加纯收入253.5～504.0 元。

After the optimal compound design (416-A) was used to conduct experiment and study on the Brazil dry rice,the high yield cultivation mathematical model of Brazil dry rice,in which the objective function was the yield of Brazil dry rice and the independent variables were respectively planting density,fertilizer amount of nitrogen,phosphorus and potassium,was established.And then computer analysis was performed on the model to search for the optimum cultivation scheme of three classes:high,medium and low.In 1998,the average yield of dry rice in Dahua County was 3 813 0 kg/hm 2 in the 101 6 hm 2 field demonstrated;In the 6 0 hm 2 area which was test and verified,the average yield of rice was 4 752 0 kg/hm 2.However,the average yield of water rice cultivated in routine way was only 3 550 5 kg/hm 2.It was obvious that the dry rice yield increased 262 5～1 201 5 kg/hm 2 compared with that of water rice cultivated in routine way,the increasing rate being 7 5%～33 8%,and the increasing net income being 253 3～504 0 yuan/hm 2.