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当前位置: 首页 > 文章 > 有机肥分解及其对土壤有机碳矿化影响的模拟研究 农业环境科学学报 2013,32 (01) 41-47
Position: Home > Articles > A Simulation Study on Decomposition of Organic Fertilizers and Its Effects on Soil Organic Carbon Mineralization Journal of Agro-Environment Science 2013,32 (01) 41-47

有机肥分解及其对土壤有机碳矿化影响的模拟研究

作  者：
汪张懿;宗良纲;褚慧;谢少华;杨旎
单  位：
南京农业大学资源与环境科学学院江苏农林职业技术学院;环境保护部有机食品发展中心;南京农业大学资源与环境科学学院;江苏农林职业技术学院
关键词：
有机肥料;土壤有机碳矿化;有机种植;模型模拟
摘  要：
以商品有机肥、油菜饼肥和秸秆堆肥三种不同种类有机肥为供试材料,采用土壤呼吸瓶装置进行实验室培养以模拟土壤施肥效应,测定三种肥料的有机碳分解动态变化量及其对土壤有机碳矿化的影响。结果表明,培养条件下三种有机肥的分解特性差异极大,油菜饼肥与秸秆堆肥在培养前25d分解速率呈现快速升高后又快速下降的变化规律,其中C/N最低的油菜饼肥更加明显,而C/N最高的商品有机肥分解速率很低;三种有机肥料处理下的土壤有机碳累积矿化量存在极显著性差异(P<0.01),大小顺序依次为油菜饼肥处理>秸秆堆肥处理>商品有机肥处理;培养结果运用农田土壤有机碳动态模拟模型,获得商品有机肥、油菜饼肥和秸秆堆肥的易分解比F分别为0.22、0.57和0.47及其一级动力学常数K1=0.019、K2=0.97×10-3、Ks=0.80×10-3(d-1);比对实验测定数据与模型模拟数据表明,当商品有机肥与含氮量最高的油菜饼肥混合比例为2:1时,就能极显著提高商品有机肥的分解率(P<0.01);而秸秆堆肥与油菜饼肥1:1混合时,亦能极显著提高秸秆堆肥的分解率(P<0.01)。
译  名：
A Simulation Study on Decomposition of Organic Fertilizers and Its Effects on Soil Organic Carbon Mineralization
作  者：
WANG Zhang-yi1,ZONG Liang-gang1*,CHU Hui1,XIE Shao-hua1,YANG Ni1,LUO Min2(1.College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095 China;2.Organic Food Development Centre,MEP,Nanjing 210042,China)
关键词：
organic fertilizer;soil organic carbon mineralization;organic farming;modeling
摘  要：
Dynamics of organic carbon in commercial organic fertilizer,rapeseed cake fertilizer,and straw compost under simulated culture conditions were studied in soil respiration bottles and their effects on soil organic carbon mineralization were determined.It was found that the decomposition of three organic fertilizers showed different characteristics at culture conditions.The decomposition rate of rapeseed cake fertilizer and straw compost underwent a rapid increasing stage which was followed by a quick declining during 25 days after they were mixed with soil.Such a trend was more significant in rapeseed cake fertilizer with lower C/N ratio.Nevertheless,the decomposition rate of commercial organic fertilizer which has higher C/N ratio than the others was slower.Total amount of mineralized organic carbon in soil with different fertilizer treatment followed the sequence of rapeseed cake fertilizer > straw compost > commercial organic fertilizer,with statistical significance of P<0.01.The data were fitted with the Soil-C model.It was determined that the fractions of readily decomposed components in commercial organic fertilizer,rapeseed cake fertilizer,and straw compost were 0.22,0.57,and 0.47,respectively.The first order kinetic constants K1,K2,Ks were determined to be 0.019,0.97×10-3,and 0.80×10-3(d-1),respectively.The decomposition ratio increased with the increased nitrogen content and the rapeseed cake fertilizer with highest nitrogen content among three fertilizers had the highest decomposition ratio.The comparison between experimental data and model simulation revealed that mixing commercial organic fertilizer with rapeseed cake fertilizer at ratio of 2:1 significantly enhanced its decomposition(P<0.01).Similar enhancement was also observed when straw compost was mixed with rapeseed cake fertilizer at ratio of 1:1(P<0.01).

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