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1980-1985年,同京郊大兴县农科所协作,并在他们试验基地连续进行了五年翻压田菁定位试验。结果表明:①京郊砂质潮土翻压田菁平均年增产幅度为5.4%左右,而且翻压年限越长,增产幅度越大。②,翻压田菁对土壤有机质增加的程度取决于翻压年限和翻压时田菁的 C/N;一般地说,翻压一年田菁至少可以补偿作物对土壤有机质两年的消耗。尚可增加 N、P 等有效养分。③,翻压田菁可促进土壤腐殖质的积累,也影响腐殖质各组分的变化。C/N 下降,HA/FA 上升。
1980-1985, with the northern suburbs Daxing County Agricultural Cooperatives, and in their experimental base for a continuous five-year pressure Slash locating test. The results show that: ① The mean annual yield of Slash Sediment of Subsoil sandy soils is about 5.4% in the suburbs of Beijing, and the longer the rollover duration is, the larger the yield is. ②. The extent of increase of soil organic matter by turning on Soybean depends on the turning-on period and the C / N of Sesbania at turning-on. Generally speaking, Soybean turning over for one year can at least compensate the crop’s consumption of soil organic matter for two years. Still can increase N, P and other effective nutrients. ③, Transverse cypress can promote the accumulation of soil humus, but also affect the changes of humus components. C / N decreased, HA / FA increased.