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当前位置: 首页 > 文章 > 禁牧对祁连山冰沟流域高山草甸土有机碳及理化性质和酶活性的影响 干旱地区农业研究 2017 (4) 179-184
Position: Home > Articles > Effect of banning grazing on alpine meadow soil organic carbon,physio-chemical properties and enzyme activities in Binggou Watershed,Qilian Mountains Agricultural Research in the Arid Areas 2017 (4) 179-184

禁牧对祁连山冰沟流域高山草甸土有机碳及理化性质和酶活性的影响

作  者：
邱丽华;秦嘉海;张勇
单  位：
河西学院农业与生物技术学院;甘肃省张掖市肃南县农业技术推广中心
关键词：
祁连山;高山草甸土;有机碳;酶活性
摘  要：
在青海省祁连山冰沟流域的高山草甸土上,选择放牧与禁牧2个样品采集区,研究了禁牧对祁连山冰沟流域高山草甸土有机碳及理化性质和酶活性的影响。结果表明:高山草甸土遭到放牧牲畜连续3年的啃食和践踏后,植被覆盖度明显降低,归还到土壤中的生物量和枯落物积累量减少,0~20 cm土层有机质含量、有机碳密度、总孔隙度、团聚体、田间持水量、氮磷钾和酶活性降低,容重、CaCO_3和可溶性盐增加,但20 cm以下土层这些性质变化不大。放牧与禁牧比较,0~20 cm土层土壤容重、可溶性盐和CaCO_3分别增加14.15%、6.35%和1.27%;有机碳含量、有机碳密度、总孔隙度、团聚体和田间持水量分别降低29.76%、22.82%、9.45%、6.49%和7.69%;全氮、全磷、全钾、脲酶、蔗糖酶、磷酸酶和过氧化氢酶分别降低25.97%、15.56%、12.17%、33.77%、26.11%、42.00%、29.31%。放牧对有机碳、容重、孔隙度、田间持水量、可溶性盐、氮磷钾和酶活性影响深度为20 cm,对团聚体影响深度为40 cm。
译  名：
Effect of banning grazing on alpine meadow soil organic carbon,physio-chemical properties and enzyme activities in Binggou Watershed,Qilian Mountains
作  者：
QIU Li-hua;QIN Jia-hai;ZHANG Yong;School of Agriculture and Biotechnology of Hexi University;Zhangye in Gansu Province Suna County Agricultural Technology Promotion Center;
关键词：
Qilian Mountain;;alpine meadow soil;;organic carbon;;enzyme activity
摘  要：
The experiment was conducted to determine the influence of banning grazing on alpine meadow soil organic carbon,physio-chemical properties and enzyme activities at Ice Valley,Qilian Mountain. The results showed that the vegetation coverage,soil biomass and organic matter content of alpine meadow soil were decreased significantly after grazing for three years. Organic matter content,organic carbon density,total porosity,aggregate,field capacity,NPK content and enzyme activity at 0 ~ 20 cm layer was decreased,and soil bulk density,Ca CO3 and soluble salt content was increased. Compared with grazing,the soil bulk density,Ca CO3 and soluble salt content at 0 ~ 20 cm layer in area of grazing prohibition were increased by 14. 15%,6. 35%,and 1. 27%,and organic matter content,organic carbon density,total porosity,aggregate,and field capacity by 29. 76%,22. 82%,9.45%,6. 49%,and 7. 69%,respectively; while the urease,sucrase,phosphatase and calatase activities and total NPK was reduced by 33. 77%,26. 11%,42. 00%,29. 31%,25. 97%,15. 56% and 12. 17%,respectively. In conclusion,the influencing depth of grazing on organic carbon,soil bulk density,total porosity,field capacity decreased,soluble salt content,NPK and enzyme activity was 0 ~ 20 cm soil depth,whereas that on aggregate was 0~ 40 cm soil depth.

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