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采用砂滤管田间模拟方法 ,对不同有机物料在冀西北高寒半干旱区栗钙土中的转化特点 ,进行了研究。结果表明 :( 1)有机物 (肥 )料在栗钙土中初期前 3个月分解较大 ,矿化碳累积量快 ,此后逐渐变慢 ,至腐解 2年时所有有机物 (肥 )料渐趋稳定状态。不同有机物 (肥 )料的分解速率表现为 :猪粪 >羊粪 >牛粪 >马粪 >农家肥。秸秆类有机物料中小麦秸分解最慢 ,其他则无明显差异。至腐解 2年时所有物 (肥 )料渐趋稳定状态 ;( 2 )栗钙土中有机物 (肥 )料的腐殖化系数变动在0 2 5～ 0 72之间 ,并表现为农家肥 >马粪 >牛粪 >羊粪 >猪粪 ;小麦秸 >莜麦秸 >披碱草 ;豆科秸秆十分相近 ;( 3)有机物 (肥 )料碳素矿化动力学过程可以用 1/Ct=1/C0 +b/t ,Ct=C0 e-kt,Ct=A+Bt1 / 2 和Ct=AtB 定量描述 ,动力学参数C0 ,k ,A值等可表征碳素矿化特征
The sand filtration tube field simulation method was used to study the transformation characteristics of different organic materials in the chestnut soil in the alpine semiarid region of northwestern Hebei Province. The results showed that: (1) organic matter (fertilizer) material in the chestnut soil in the early three months decomposition of the larger, rapid accumulation of mineralized carbon, and then gradually slow to decompose all organic matter To stabilize the state. Different organic matter (fertilizer) decomposition rate of material performance: pig manure> sheep manure> cow manure> horse manure> manure. Straw straw organic matter decomposition of the slowest, the other no significant difference. (2) the humification coefficient of organic matter (fertilizer) in chestnut soil varied from 0 2 5 ~ 0 72, and showed that the manure > Horse manure> cow manure> sheep manure> pig manure; wheat straw> 莜 wheat straw> Elymus herb; legume straw is very similar; (3) organic matter (fertilizer) carbon mineralization kinetics can be 1 / Ct = 1 / C0 + b / t, Ct = C0 e-kt, Ct = A + Bt1 / 2 and Ct = AtB quantitative description of the kinetic parameters C0, k, A value can be characterized by carbon mineralization characteristics