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1试验来源和目的1.1试验来源根据全国农业技术推广服务中心关于在蔬菜等经济作物上开展“2+X”试验要求及省、市、县测土配方施肥工作实施方案,进行该项试验。1.2试验目的开展此项试验是获得马铃薯的最佳施肥量、施肥比例、施肥时期、施肥方法的根本途径,也是筛选、验证土壤养分测试方法,建立施肥指标体系的基础环节。通过田间试验,可以掌握各个施肥单元作物优化施肥数量,构建作物施肥模型,进一步修正、完善
1 Source and purpose of the experiment 1.1 Test sources According to the National Agricultural Technology Extension Service Center on the implementation of “2 + X ” test on the economic crops such as vegetables and the implementation plan of soil testing and fertilizer application in provinces, cities and counties . 1.2 Purpose of the experiment Carrying out this experiment is the fundamental way to obtain the optimum fertilization rate, fertilization ratio, fertilization period and fertilization method of potato. It is also the basic link of screening and verifying soil nutrient testing method and establishing fertilization index system. Through field trials, we can master the quantity of fertilizers optimized for each unit of fertilizer application, construct a fertilization model for crops, and further amend and improve