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采用尼龙网袋法直接覆盖及覆土还田,研究了生物耕作下不同蔬菜(玉米、芋艿、山芋以及毛豆)茎秆还田后的腐解速率,建立了不同蔬菜的腐解模型。结果表明,蔬菜茎秆还田后,腐解速率表现出先快后慢的特征;在试验期内,玉米、山芋、芋艿以及毛豆等4种蔬菜茎秆的腐解率依次达到73.8%、95.9%、99.2%和75.4%,T2处理(10 cm)显著高于T1(0 cm);提出了不同蔬菜茎秆残留量自然对数的天数回归方程,可以预测蔬菜茎秆还田的腐解期限。
Using nylon net bag method to directly cover and return to soil, the decomposition rate of different vegetables (corn, taro, potato and soybean) under field tillage was studied, and the rotting model of different vegetables was established. The results showed that the decomposing rate of vegetable stalks showed the characteristics of fast and slow after returning to the field. During the experimental period, the decomposition rate of stalks of corn, potato, taro and soybean was 73.8% and 95.9% , 99.2% and 75.4%, respectively. T2 treatment (10 cm) was significantly higher than T1 (0 cm). The regression equation of natural logarithm of stalk residue in different vegetables was proposed, which could predict the period of decomposing vegetable stalks.