中稻高产栽培最佳施肥量、施肥技术的研究

Study of Optimum Fertilizing Amount and Fertilization Technology of High-yield Cultivation of Middle-season Rice

[目的]为青阳县中稻超高产栽培提供科学施肥依据。[方法]通过对中稻开展不同施肥方法、不同氮肥水平、不同钾肥水平肥效试验,同时根据土壤供肥性能、作物需肥规律和肥料效应,提出氮磷钾适宜施用量、比例以及相应的施肥技术。[结果]根据试验结果,应用方差分析,得出最佳施肥方法和最佳施肥量。[结论]生产上推荐最佳施肥方法是稳前攻中法,即基肥∶分蘖肥∶穗肥∶粒肥为4∶3∶3∶0。最佳施肥量是纯氮(N)180 kg/hm2、纯磷(P2O5)75 kg/hm2、纯钾(K2O)120 kg/hm2。

[Objective]The research aimed to provide the basis for the fertilizing method of high-yield cultivation of middle-season rice.[Method] Trials of different fertilizing method,different level of nitrogenous fertilizer and different level of potash fertilizer were carried out.According to the nutrient preserving capability of the soil,law of fertilizer requirement and fertilizer response,optimum fertilizing amount and ratio of N,P2O5 and K2O and the corresponding fertilization technology were given.[Result]Based on the experimental results,the optimum fertilizing method and optimum fertilizing amount were obtained with variance analysis.[Conclusion] The optimum fertilizing method was stabilizing before and attack the middle method,whose ratio of basic fertilizer,tiller fertilizer,fertilization for head sprouting and granula fertilizer was 4∶3∶3∶0.The optimum fertilizing amount of N,P2O5 and K2O was 180,75 and 120 kg/hm2,respectively.