由第二次土壤普查和肥源调查结果表明,我县存在着盲目偏施氮肥,少施钾肥的施肥三要素比例严重失调的现象。造成稻田病虫害日趋严重,化肥利用率不高和经济效益低。为落实土壤普查成果,搞好科学施肥,提高肥料经济效益,我站针对本县土壤类型、养分状况及水稻需肥规律,制定以田定产,以产定肥的施肥方案。一、配方施肥的依据和方法(一) 根据土壤速效养分含量确定氮、磷、钾配比和微量元素的施用。(二) 根据土壤供肥性能和水稻需肥规律确定前、中、后期施用的比例、品种和方法。(三) 根据土壤供给养分和 The results of the Second Soil Census and Fertilizer Survey show that there is a serious imbalance in the proportion of three fertilizers applied blindly to nitrogenous fertilizer and less applied potassium fertilizer in our county. As a result, the pest and disease in paddy fields are becoming more and more serious, the utilization rate of chemical fertilizers is not high, and the economic benefits are low. In order to implement the results of the soil survey, improve scientific fertilization and increase the economic benefits of fertilizers, according to the types of soils in the county, the status of nutrients and the rules of fertilizer demand in rice, we formulated a fertilization program that uses the fixed-field method to produce fertilizers. First, the formula fertilizer basis and methods (A) based on soil available nutrients to determine nitrogen, phosphorus and potassium ratio and trace elements. (B) According to soil fertility and rice need to determine the law of fertilization before, during and after the application of the proportion of varieties and methods. (C) According to soil nutrient supply and