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采用均匀设计方法,研究了高肥地区土壤条件下冬小麦再高产以施肥为主的农艺措施与产量的定量关系,建立了产量与施肥、播期、播量等6个因素的回归方程,并模拟了试验取得最高产量时的相应措施量。模型分析表明,基N、基P和基K化肥对产量具有显著的负效应,拔节期追N为正效应。利用回归模型对目前小麦生产技术量值的产量效应分析表明,在高肥地力条件下,现今生产中底施N、P化肥,实质上在对产量的形成帮“倒忙”。因此,在大量施用有机肥的基础上,免施底化肥,增加追N量,“稳前攻后”成为高肥地冬小麦再高产的重要施肥技术途径。
The uniform design method was used to study the quantitative relationship between the agronomic measures and the yield of winter wheat under high soil fertility conditions in high fertilization area. The regression equations of yield and fertilization, sowing date and sowing rate were established and simulated The amount of the appropriate measure at the time of the test to obtain the highest yield. The model analysis showed that base N, base P and base K chemical fertilizers had a significant negative effect on yield, and N was a positive effect at jointing stage. The yield effects of the current wheat production techniques using regression models show that under the condition of high fertility, the production of N and P fertilizers in the bottom can actually help the yield formation. Therefore, on the basis of applying a large amount of organic fertilizer, the application of bottom fertilizer was avoided and the amount of N was increased. After the “steady frontage attack”, it became an important fertilization technique for high-yielding winter wheat with high yield.