• ISSN 1008-505X
  • CN 11-3996/S
戴万宏, 刘军, 王益权, 赵磊. 不同培肥措施下土壤CO2释放及其动力学研究[J]. 植物营养与肥料学报, 2002, 8(3): 292-297. DOI: 10.11674/zwyf.2002.0307
引用本文: 戴万宏, 刘军, 王益权, 赵磊. 不同培肥措施下土壤CO2释放及其动力学研究[J]. 植物营养与肥料学报, 2002, 8(3): 292-297. DOI: 10.11674/zwyf.2002.0307
DAI Wan-hong, LIU Jun, WANG Yi-quan, ZHAO Lei. Study on CO2 emissions and its kinetics of soils with different fertilization systems[J]. Journal of Plant Nutrition and Fertilizers, 2002, 8(3): 292-297. DOI: 10.11674/zwyf.2002.0307
Citation: DAI Wan-hong, LIU Jun, WANG Yi-quan, ZHAO Lei. Study on CO2 emissions and its kinetics of soils with different fertilization systems[J]. Journal of Plant Nutrition and Fertilizers, 2002, 8(3): 292-297. DOI: 10.11674/zwyf.2002.0307

不同培肥措施下土壤CO2释放及其动力学研究

Study on CO2 emissions and its kinetics of soils with different fertilization systems

  • 摘要: 实验室恒温密闭培养法研究了 4种培肥措施连续培肥 23年后农田土壤的CO2释放状况及其动力学特征。结果表明 ,含水量 12%至 24%范围内 ,土壤CO2释放过程完全可以用一级反应动力学方程 y =A0(1-e-kt)进行定量描述 (r2=0.9812~0.995 9,P 0.01) ;土壤CO2释放量和潜在可释放C量A0 随含水量增加呈线性增加 (r2=0.9728~0.9987,P0.01) ,速率常数k则随含水量增加呈线性降低 (r2=0.9356~0.9939,P0.01)。不同培肥措施明显影响土壤CO2释放状况及其动力学特征参数 ;NP化肥和厩肥 +NP化肥 2种培肥措施较不施肥对照明显增加了土壤CO2释放量、潜在可释放C量A0和速率常数k ;秸秆 +NP化肥培肥措施较不施肥对照显著增加了土壤CO2释放量、潜在可释放C量A0,但却显著降低了释放速率常数k ;有机无机肥料配合措施 (秸秆 +NP、厩肥 +NP)与单施NP化肥措施比较 ,明显降低了释放速率常数k。

     

    Abstract: CO2 emission and its kinetics of farmland soils with different fertilization systems were studied by incubation method. The results showed that CO2 emission of farmland soils is a first-order reaction in the condition of water content between 12% and 24%. CO2 emission of soils can be described quantitatively by kinetic equation y=A0(1-e-kt) of first-order reaction (r2=0.9812~0.9959). Kinetic coefficient A0(potential respiration C)was increased linearly with the increasing of water content (r2=0.9728~0.9987). Rate constant k was decreased linearly with the increasing of water content (r2=0.9356~0.9939). The kinetics and its coefficient of CO2 emission of farmland soils were affected significantly by fertilizations. Contrasted to CK (no fertilizer) soil, the potential respiration C(A0) and rate constant (k) of soils with NP fertilizer or manure +NP fertilizer were increased significantly, and A0 of soil with straw +NP fertilizer was also increased significantly, but k of soil with straw +NP fertilizer was decreased significantly. Contrasted to soil with NP chemical fertilizers, the rate constant (k) of soils fertilized with organic and inorganic fertilizer ( straw +NP, manure +NP ) was decreased significantly.

     

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