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研究不同有机肥料的分解特征及其在保持和提高土壤有机质含量方面的作用,对合理施用有机肥和估算有机质平衡具有重要意义。本试验用砂滤管法测定不同季节施用的玉米秸、麦秸、苕子、猪粪等有机肥在田间条件下的分解速率,并观察试验地10厘米深处土壤温度的年变化情况,以研究分解时间、土壤温度变化对不同有机肥分解速度的影响,建立不向有机肥分解特征方程,找出能反映有机肥分解难易程度的特征参数。 (一)不同有机肥的分解特征
Studying the decomposition characteristics of different organic fertilizers and their roles in maintaining and increasing soil organic matter content are of great importance to rational application of organic manure and estimation of the balance of organic matter. In this experiment, the rate of decomposition of organic manure such as corn stalks, wheat straw, razor clam and pig manure applied in different seasons under field conditions was measured by sand filter tube method. The annual variation of soil temperature at 10 cm depth was observed to study Decomposition time and soil temperature on the decomposition rate of different organic manures, and established the characteristic equation without decomposing organic manure and found the characteristic parameters that can reflect the ease of organic manure decomposition. (A) different decomposition characteristics of organic fertilizer