摘要
提出了一般气侯条件下,亩产皮棉60公斤、75公斤及90公斤左右的棉花需肥规律。建立了各生育时期棉株的养分积累量与其生育进程间的动态模型。棉花由开花期到吐絮期是养分的最大效率期,花铃肥应在开花期施用。根据棉田土壤养分含量、棉花需肥规律进行了多年肥效和最佳用量试验,从而建立起棉花平衡施肥模型,提出了不同地力棉田,施用氮磷钾和微量元素肥料的最佳组合及施用适期。为施肥推荐系统的建立提供了科学依据。
According to the results of the experlment researches,we advanced regulars of cotton's need for fertilizer on the 60,75 and 90 kg/mu or so lint cotton yield under the condition of general climate and we built the dynamic model between accumulation of nutrients of cotton plant and growth progress in each growth period.The cotton absorbs most amount of nutrient from flower to boll opening,the stage is largest efficiency stage of nutrient.According to the content of the nutrient in cottin field and the law of cotton's need for fertilizer,we have engaged in the effect of fertilizer and optimum application rate for years,thereby we built the model of cotton's equilibrated fertilization,and we advanced the optimum composition and the suitable application stage of NPK and micronutrients fertilizer at different levels of the fertility of cotton field.In a word,the results of our research provided scientific basic for the recommended fertilization system.
出处
《棉花学报》
CSCD
北大核心
1990年第2期58-65,共8页
Cotton Science
关键词
棉花
平衡施肥模型
施肥
cotton
the law of the need for ferilizer
the model of equilibrated fertilization
