晚稻旱育秧综合配套技术研究

通过五元二次回归旋转组合设计试验，明确了影响洞庭湖区晚稻生产的主要因素，依次为播种量（X1），2．1叶期喷施效唑（X4）移栽叶龄（X2），分蘖期施纯氮（X5）等，建立了五元二次目标函数模型，提出了适应洞庭湖区一季晚稻和双季晚稻的五套优化综合配套技术，探讨了二因素对产量影响显著的交互效应。

On the Comprehensive Supporting Techniques of the Dry Raising Method of Late Rice Seedlings

This paper presents that by 5-factor quadratic regressian rotation modular design experiment,the major factors that affect the production of late rice in the Dongting Lake region have been understood clearly. They are sequentially the seeding rate (x1),the foliage-spraying efffect azole in the 2. 1 leaf-growing stage (x4), the proper leaf-growing duration when late rice seedlings are transplanted (x2),the applyuing of pure nitrogerous fertilizer in the tillering stage (x5)and so on. The 5-factor quadratic objective function model has been established. Five series of optimized,comprehensive and supporting techniques of adapting single-cropping late rice and double-cropping late rice in the Dongting Lake region have been advanced. The reciprocal effect of the two factors which is remarkable to af fect late rice yields has been approached.