摘要
采用5因素5水平二次正交旋转回归组合设计,经1987年和1988年田间试验,分别建立了两种不同气候年型下亩优质铃数、亩总铃数和平均单铃重的数学模型。通过对各模型降维处理,分析了不同气候年型,在模拟平均优化方案和当地经验丰产方案两种不同植棉管理水平下,去早蕾对增加铃数和铃重的重要性,单因子效应与其他农艺措施的交互效应;明确了相应情况下去早蕾的适宜数量和使该项技术有效地发挥增产作用的其他农艺措施协调配合问题。
A rotational central composite design with orthogonality was applied to set up five-ele- ment quadratic regression equations to describe the numbers of good bolls and total bolls per mu and mean single boll weight in cotton in relation to sowing date,side-dressing N,plant density,spraying DPC,and early season square removal(ESSR) in 1987 and 1988,By reduc- ing the dimensions of each equation,the importance of single factor and interactions between ESSR and other agronomic factors on the numbers and weight of cotton boll were analysed. The suitable number of ESSR and how the removal technique can be effectively integrated with the other agronomic meacures were suggested in the management of simulated optimal agro- nomic schemes from simulation and empirical high yield agronomic schemes from the empirical summary in different years.
出处
《棉花学报》
CSCD
北大核心
1991年第1期77-85,共9页
Cotton Science
关键词
棉花
去早蕾
铃数
铃重
模拟
Cotton
ESSR
Weight of Bolls
Simulation
