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基于2008~2013年测土数据和基础地理数据,结合养分丰缺指标调整系数法施肥模型,构建了县域水稻施肥指标体系,运用GIS技术,对县域土壤进行了养分综合分区,得到各区水稻最佳经济效益和对应的施肥量、施肥比例,同时,通过“3414”试验进一步验证施肥模型的准确性。结果表明:余干县水稻有两大施肥分区,施肥比例分别为1∶0.4∶0.7,1∶0.5∶0.75;养分丰缺指标调整系数法施肥模型克服了传统的目标产量法施肥模型的缺陷,所形成的施肥配方符合余干县的实际情况,可在全县范围内推广指导农民科学施肥。
Based on the soil testing data and the basic geography data from 2008 to 2013, combined with fertilization and fertilization model, the index system of rice fertilization in counties was established. With the application of GIS technology, the nutrients of the county soil were comprehensively zoned to obtain the best rice Economic benefits and the corresponding amount of fertilizer, fertilization ratio, at the same time, through the “3414 ” test to further verify the accuracy of the fertilization model. The results showed that there were two major fertilization zones in Yugan County, with fertilization rates of 1: 0.4: 0.7, 1: 0.5: 0.75, respectively. Nutrient abundance index adjustment coefficient fertilization model overcame the shortcomings of traditional fertilization model of target yield, The resulting fertilization formula in line with the actual situation in Yugan County, within the county to promote the scientific guidance of farmers to promote fertilization.