协优46亩产超500公斤综合农艺数学模型及优化方案的研究

本研究根据“最佳模拟配合法”原理,于1988年选择杂交晚稻协优46高产栽培技术体系中几个关键性农艺因素,采用五元二次回归正交旋转组合设计法,进行多因素、多水平的试验研究,建立了平均亩产500公斤以上的综合农艺数学模型及其优化方案415套。预期亩产533.47±21.51公斤的农艺优化措施方案为:秧田亩播种量7.6～8.2公斤;秧龄40.1～41.2天;亩栽2.6～2.8万丛;亩施氮素量16.8～17.9公斤;亩施K_2O量11.6～12.5公斤。此方案经本所1989、1990两年大田示范验证,比对照(经验方案)分别增产8.6％和13.0％,证明方案可行。

A Comprehensive Agronomic Model and Programs Selected Out for Yield Over 500kg/mu of Xieyou46, a Hybrid Rice

Several cultural factors, critical to higher yield of Xieyou46, a late hybrid rice (Oryza sativa L. Subsp. indica) , were chosen to establish a comprehensive agronomic model with the quintuple-variate quadralic orthogonal- gyrating - regression design according to the optimum compound method with Analogue of system engineering 415 sets of schemes were selected out, which made yield more than 500kg/mu at 95% probability. The parameters of the scheme for 533. 47()21. 51kg/mu were 7. 6-8. 2kg per mu for sowing norm in the nursery filed, 40. 1-41. 2 days for seedling age, 26-28 thousand hills per mu for transplating, 16. 8~17. 9kg nitrugen and 11. 6-12. 5kg K2O per mu for fertilizer . Following this scheme , the practical yields were 496. 6 kg / mu (1989) and 520. 4kg/mu (1990), 8. 6% and 13. 0% higher than the control, with the triditional scheme, respectively , which proved that program feasible.