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土壤养分丰缺指标试验(简称五区试验),是联合国粮农组织推荐的,国际通用的专项试验。主要用于确定土壤养分丰缺指标,划分地力等级,提供配方施肥参数等。为了对滕州市的主要土类——褐土(占总耕地面积的65%)进行地力分级,于1988一1989年度,以冬小麦为供试作物,在代表全市褐土高、中、低产地力水平的15个试验点设置了土壤养分丰缺指标试验。对其试验结果,应
Soil nutrient abundance index test (referred to as the five zone test), is recommended by the United Nations Food and Agriculture Organization, a special international universal test. Mainly used to determine indicators of soil nutrient abundance and shortage, classification of soil fertility levels, to provide formula fertilization parameters. In order to classify the main soil-cinnamon soil (65% of the total cultivated land area) in Tengzhou City, in 1988-89, winter wheat was used as a test crop, and on behalf of the city’s cinnamon soil with high, medium and low productivity The level of 15 test sites set soil nutrient abundance index test. The test results should be