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当前位置: 首页 > 文章 > 水蚀风蚀交错带草地土壤碳氮组分对柠条的响应特征 水土保持研究 2018 (5) 29-35
Position: Home > Articles > Characteristics of Response of Soil Carbon and Nitrogen Fractions to Caragana korshinskii Kom in Grassland of Wind-Water Erosion Crisscross Region Research of Soil and Water Conservation 2018 (5) 29-35

水蚀风蚀交错带草地土壤碳氮组分对柠条的响应特征

作  者：
朱寒松;李学章;贾小旭;邵明安;魏孝荣
关键词：
水蚀风蚀交错带;草地;柠条;有机碳组分;氮组分;不同生长年限
摘  要：
采用相对密度分组法研究了水蚀风蚀交错带不同年限草地和相邻柠条林地0—40cm土层土壤碳氮组分分布特征,旨在揭示研究区草地土壤碳氮组分对柠条的响应特征。研究结果显示:草地转变为柠条林后,土壤重组有机碳和全氮含量变化很小(分别介于-0.19~0.06g/kg和-0.001~0.017g/kg),而轻组有机碳和全氮含量变化较大,并且随年限和土层的不同而异。25年柠条林地土壤有机碳和全氮在0—40cm土层的储量分别增加了10.94 Mg C/hm~2,0.07 Mg N/hm~2,而轻组有机碳和全氮分别增加了2.41 Mg C/hm~2,0.11 Mg N/hm~2;40年柠条林0—40cm土层土壤轻组有机碳降低了4.54 Mg C/hm~2重组有机碳和总有机碳增加了6.26,1.72Mg C/hm~2;而土壤全氮、轻组和重组全氮储量分别降低了0.73,0.44,0.29 Mg N/hm~2。这些结果表明草地转变为柠条林后,土壤有机碳和全氮的变化分别由重组有机碳和轻组全氮引起。
译  名：
Characteristics of Response of Soil Carbon and Nitrogen Fractions to Caragana korshinskii Kom in Grassland of Wind-Water Erosion Crisscross Region
作  者：
ZHU Hansong;LI Xuezhang;JIA Xiaoxu;SHAO Mingan;WEI Xiaorong;College of Natural Resources and Environment,Northwest A&F University;State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess,Northwest A&F University;Institute of Subtropical Agriculture,Chinese Academy of Sciences;Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences;
单  位：
ZHU Hansong%LI Xuezhang%JIA Xiaoxu%SHAO Mingan%WEI Xiaorong%College of Natural Resources and Environment,Northwest A&F University%State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess,Northwest A&F University%Institute of Subtropical Agriculture,Chinese Academy of Sciences%Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences
关键词：
wind-water erosion crisscross region;;grasslands;;Caragana korshinskii Kom;;organic carbon fractions;;nitrogen fractions;;different growth years
摘  要：
In order to reveal the characteristics of response of soil carbon and nitrogen fractions to Caragana korshinskii Kom in grasslands in the study area,relative density fraction method was used to study the distribution of soil carbon and nitrogen fractions in the 0—40 cm soil layer in grasslands and adjacent Caragana stands with different growth years in wind-water erosion crisscross region.The results showed that soil heavy fraction organic carbon and total nitrogen varied relatively little after conversion of grasslands to Caragana stands(-0.19~0.06 g/kg and-0.001~0.017 g/kg),contrarily,light fraction organic carbon and total nitrogen changed significantly after the conversion,and performed differences with different growth years and soil layers.The soil organic carbon and total nitrogen stocks in the 0—40 cm soil increased by10.94 Mg C/hm~2 and 0.07 Mg N/hm~2 in 25-year Caragana,respectively,and light fraction organic carbon and total nitrogen stocks increased by 2.41 Mg C/hm~2 and 0.11 Mg N/hm~2,respectively;the light fraction organic carbon stock in the 0—40 cm soil decreased by 4.54 Mg C/hm~2,and the heavy fraction organic carbon and total organic carbon stocks increased by 6.26 Mg C/hm~2 and 1.72 Mg C/hm~2 in 40-year Caragana,respectively;however,the soil total nitrogen,light fraction and heavy fraction total nitrogen stocks decreasedby 0.73 Mg·N/hm~2,0.44 Mg·N/hm~2 and 0.29 Mg·N/hm~2,respectively.These findings indicated that changes of soil organic carbon and total nitrogen after conversion of grasslands to Caragana stands were attributed to changes of soil heavy fraction organic carbon and light fraction total nitrogen.

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