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农桐间作是合理利用土地的一种经营方式。我们于1978—1980年在河南民权县黄庄公社进行了三年定位试验,观测农桐间作下土壤水肥动态及其变异性。采样方法:按桐树生长季节定期采集土壤样品,在树距2m、10m、30m处混合取样(每个树距三次重复),测定分析。整个采样深度达1.4m,每隔20cm取样。测定项目有土壤水分、养分(氮、磷、钾)、酸碱度、碳酸钙、可溶性钙和镁。
Intercropping farmland is a rational use of land as a mode of operation. We conducted a three-year positioning experiment at Huangzhuang Commune, Civil Rights County, Henan Province, from 1978 to 1980 to observe the dynamics of soil water and fertilizer dynamics and their variability under the Intercropping of Triticum aestivum. Sampling Method: According to the growth season of T. tung, soil samples were collected regularly and sampled at 2m, 10m and 30m intervals (three times of each tree repeat), and then analyzed. The entire sampling depth of 1.4m, sampling every 20cm. Determination of the project soil moisture, nutrients (nitrogen, phosphorus, potassium), pH, calcium carbonate, soluble calcium and magnesium.