摘要
选用8B40和早秈213进行双季早稻秧龄、亩穴数和施N、P、K量五因素五水平二次正交旋转组合设计试验。结果表明:五因素对产量及其构成因素之间的影响极显著。用二次回归方程模拟选优,亩产450千克以上的组合有574个,其95%置信度的农艺措施是秧龄29～30天、亩穴数3～3.5万穴、亩施纯氮、P_2O_5和K_2O量依次为11～12、3.8～4.3、12～13千克。根据试验和调查数据研制的与回归数模相配套的栽培模式表,内容包括技术路线、产量构成因素及栽培技术体系。其技术路线是四少四高栽培法,即选用当地本季适宜的早稻良种,适当减少播种量、大田穴苗数、分蘖肥和灌水量,在适宜亩穗数基础上提高分蘖穗率、茎蘖成穗率、结实率和穗谷重,达到高产高效。
Experiments were conducted on early rice' 8B40 and ZaoXuan213' using the design of rotation regression orthogonal conbination in Wuhu and Shuchen counties from 1990 to 1991. Experiments consisted of five factors each with 5 levels: seeding age, bunches/mu, nitrogen, phosphorous, and potassiun application. The data gained by statistical analysis indicate that the factor effects on the paddy yield and the main components are very remarkable as are proved through the respective quadratic regression equations. Results from the (?)imulant selection show that there are 574 Combinations lurned out yield over 450kg/mu. The agricultural measues for over 95% of the confident interval are the seeding age about 29—30 days, 30—35 thousand bunches/mu, N--P_2O_5—K_2Osucessively 11—12, 3.8—4 and 12—13 kg/mu. Based on the experimental results, field example, and demonstration, a cultural model that coordinated with the regression mathematical model was worker out witch includs technical route, components of yield, and the system of cultivated techniques. Properly reduce seed quantity/mu, bunches/mu, tiller manuring and quantity of irrigation in order to increase the effective panicles, rate of fruits, and grain weight/panicle and to get high yield and best benefit.
关键词
早稻
栽培
水稻
双季稻
Early rice
Regression model
Cultivaled model table
Route of cultivaled techniques
