稻茬免耕大麦高产栽培数学模型及优化农艺方案的研究

Studies on mathematical model and optimum scheme of agrotechnique of high yielding barley grown on no-tillage paddy field..

1989～1991年于杭州选择对大麦(品种浙农大6号)生长发育影响较大的播种量、有机肥用量和化肥氮、磷、钾用量等五个因素,采用五因素五水平(1/2实施)二次回归通用旋转组合设计,研究了稻茬免耕大麦高产栽培措施的数学模型及其优化农艺方案.试验结果表明:本试验采用的五个因素中,对产量的重要性依次为氮肥>有机肥>钾肥>播种量>磷肥;运用计算机模拟、寻优和频数分析法,建立了稻茬免耕大麦亩产大于350kg的优化农艺方案,播种量为9.76～10.22kg/亩、有机肥1379～1479kg/亩、纯氮10.40～10.74kg/亩、P_2O_52.80～3.28kg/亩和K_2O 6.10～6.27kg/亩;1990～1991年度对上年提出的数学模型和优化农艺方案进行了试验验证,信息反馈结果表明,产量等数学模型及优化农艺方案基本符合生产实际.

A current, rotational, and combinational design of quadratic regression with different rates of seeding, manure, N,P, and K was carried out to study the high yielding mathematical model of cultivation technique and its optimum scheme of agrotechnique of barley (Hordeum distichum cv. Zhenongda 6 ) grown on no-tillage paddy field in Hangzhou in 1989- 1991. The results showed that the effect of each of 5 factors of the yield in order of importance was as follows:N,manure,K,rate of seeding,and P under the condition of this experiment. The optimum scheme of yield (more than 350 kg/mu)was worked out through the frequency analysis in 1989-1990,it was 9. 76-10. 22 kg seed, 1379 - 1479 kg manure, 10. 40 - 10. 74 kg N,2. 80 - 3. 28 kg P2O5,and 6. 10 - 6.27 kg K2O/mu. According to the mathematical models and the optimum schemes,a verification-experiment was carried out in 1990 - 1991. The results showed that the mathematical models and optimum schemes were basically in accordance with the production practice.