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根据土壤供肥能力提出建议施肥量的土壤测定,亦称测土施肥,是施肥定量化的主要方法。本研定根据1982年全国协作会议选定的国际通用的土壤肥力指标与建议施肥量法,即先通过土壤养分肥力指标的研究,再定出各级指标下某一种养分的建议施肥量。全国共研究14个土类,我区承担灌淤土类,83、84年在银北占耕地面积最大的草甸灌淤土亚类(约百万亩)上按全国统一试验方案进行。本课题田间设计分 NPK、NP、NK、PK 及不施肥5个处理,随机排列,3～4次重复。品种为永良4号春麦,行距12.5或
According to the ability of soil for fertilizer recommendations soil fertility measurement, also known as soil testing and fertilization, fertilization is the main method of quantification. According to the international common soil fertility index and recommended fertilization method selected by the National Cooperative Conference in 1982, this study first determined the recommended fertilization amount of a certain nutrient under all levels through the research of soil nutrient fertility index . A total of 14 soil types were studied throughout the country. Irrigation and silting soil was undertaken by our district. In the 83,484 years, a unified national experimental scheme was carried out on the sub-type of meadow irrigated land with the largest area of cultivated land in Yinbei (about 1 million mu). The subject field design points NPK, NP, NK, PK and no fertilization 5 treatment, random arrangement, 3 to 4 times repeated. Variety Yongli 4 spring, line spacing 12.5 or