摘要
1987～1990年,10个早晚稻组合(品种),按五元二次正交旋转设计进行了试验和模拟分析,得出了综合优化方案。其中亩产超500kg的优化方案:早稻平均占总组成方案(3125套)的26.3％;晚稻平均占15.5％。由于方案发挥了综合效应,在近3年验证中表现出:“灾年少减产,常年能增产,丰年达高产”的良好效果。在亩产超500kg的基础上,早稻比对照增产8.3％～11.8％;晚稻增产6.7％～18.6％。因而,成为浙西南双季杂交稻亩产超吨粮的核心配套技术。设计条件下,早稻以亩栽丛数和本田N素施用量与产量关系最密切,晚稻以本田N素施用量与产量高低关系最大。
Experiments for exploring optimal cultivating techniques for rice were carried out with 10 rice combinations (varieties) using the quintuple-variate quadratic orthogonal-gyrating-regression design in 1987～1990. Computer simulation of yield and yield components were undertaken to reveal optimal solutions. Solutions guaranteeing a yield over 500kg/mu account for 26.3% the of total for early rice and 15.2% for late rice. These solutions have been proved to be able to reduce yield losses under disastrous weather, increase yield under normal weather and result in high yield under favourable conditions. The yield by applying such techniques has been 8.3%～11.8% and 6.7%～18.6% higher for early and late rice, respectively, than that by applying normal ones. These techniques were therefore applied as critical techniques in projects of yielding at least one T/mu in the southwest of Zhejiang province. Under optimal cultivating conditions, planting density and the amount of N applied in the paddyfield are the most important factors affecting yield for early rice, and the amount of N applied for late rice.
出处
《江西农业大学学报》
CAS
CSCD
1992年第4期301-308,共8页
Acta Agriculturae Universitatis Jiangxiensis
基金
中国农科院1987~1990年院长基金
关键词
水稻
产量
栽培
Rice(Oryza sativa L.)
Mathematical agronomical models
Optimal cultivating techniques
