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当前位置: 首页 > 文章 > 豫西黄土丘陵区不同土地利用方式土壤团聚体有机碳含量及其矿化特征 水土保持学报 2016,30 (3) 255-261
Position: Home > Articles > Characteristics of Soil Organic Carbon Content and Mineralization in Soil Aggregates under Different Land Use Patterns on the Loess Hilly Area of Western Henan Journal of Soil and Water Conservation 2016,30 (3) 255-261

豫西黄土丘陵区不同土地利用方式土壤团聚体有机碳含量及其矿化特征

作  者：
刘晶;田耀武;张巧明
单  位：
河南科技大学林学院
关键词：
黄土丘陵;不同土地利用方式;土壤团聚体;土壤有机碳;矿化
摘  要：
以豫西黄土丘陵区阔杂林、刺槐林、灌草地、果园和耕地土壤为对象,应用室内培养法,研究不同土地利用方式对土壤团聚体中有机碳含量及其矿化的影响,结果表明:不同利用方式地之间>5mm,2~5mm两个粒级风干团聚体含量无显著差异,阔杂林、刺槐林、灌草地和果园>5mm水稳性团聚体含量较耕地均显著提高,刺槐林和灌草地2~5mm水稳性团聚体含量较耕地显著提高;阔杂林、刺槐林、灌草地和果园土壤结构破坏率较耕地均显著降低,不同土地利用方式对团聚体的影响,主要表现在对较大粒级团聚体形成和稳定性的影响上。不同利用方式地均以0.25~2mm团聚体有机碳含量最高;同一利用方式地各粒级团聚体有机碳含量差异较小,但各粒级团聚体对有机碳贡献率差异较大,团聚体对有机碳的贡献率主要取决于团聚体的含量。不同利用方式地>5,2~5,0.25~2mm 3个粒级团聚体中,有机碳的累积矿化量和矿化速率均为刺槐林地>阔杂林地>灌草地>果园>耕地;各粒级团聚体有机碳矿化速率变化规律基本一致,拟合符合对数函数;团聚体可矿化有机碳的分配比例随粒级减小而变大,大团聚的固碳能力较小团聚体强。
译  名：
Characteristics of Soil Organic Carbon Content and Mineralization in Soil Aggregates under Different Land Use Patterns on the Loess Hilly Area of Western Henan
作  者：
LIU Jing;TIAN Yaowu;ZHANG Qiaoming;Forest College,Henan University of Science and Technology;
关键词：
loess hilly area;;different land use patterns;;soil aggregates;;soil organic carbon;;mineralization
摘  要：
The soil of broad mixed forest,locust forest,shrub grassland,orchard and cultivated land on the loess hilly area of western Henan was chose as the research object,effects of different land use patterns on soil organic carbon content and mineralization in soil aggregates were studied using laboratory incubation.The results showed that:There was no significant difference of>5mm grade dry aggregate content in the different land use patterns,the same to 2~5 mm grade dry aggregate content.Compared with cultivated land,the content of>5mm grade water stable aggregates of broad mixed forest,locust forest,shrub grassland and orchard and 2~5mm grade water stable aggregates of locust forest and shrub grassland significantly increased.The soil structure destruction rate of broad mixed forest,locust forest,shrub grassland and orchard decreased significantly compared with cultivated land,the effects of different land use patterns on soil aggregates mainly manifested in the formation and stability of large grain size aggregates.The organic carbon content of 0.25~2mm grade aggregates was the highest in different land use patterns,the difference of the aggregates organic carbon content in the same utilization way was very small,but the difference of aggregates organic carbon contribution rate to soil organic carbon was obviously,the contribution rate of organic carbon to soil organic carbon was mainly determined by the content of the aggregates.The amount of accumulative soil organic carbon mineralization in 3grade aggregates of>5mm,2~5mm and 0.25~2 mm was locust forest>broad mixed forest>shrub grassland>orchard>cultivated land,the change law of organic carbon mineralization rate in the grain size aggregates was the same as the amount of accumulative,the variation of mineralization rate was fitted to the logarithm function,the distribution proportion of organic carbon in soilaggregates increased with the decrease of grain size,the carbon sequestration capacity of large size aggregates was greater than small size.

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