| 川西北草地沙化对土壤可溶性有机氮及酶活性的影响 |
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| 引用本文： | 舒向阳,胡玉福,杨雨山,何佳,佘淑凤,贾安都,姜正博,孙锦杨. 川西北草地沙化对土壤可溶性有机氮及酶活性的影响[J]. 干旱地区农业研究, 2018, 36(1): 66-71 |
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| 作者姓名： | 舒向阳 胡玉福 杨雨山 何佳 佘淑凤 贾安都 姜正博 孙锦杨 |
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| 作者单位： | 四川农业大学资源学院;四川农业大学管理学院; |
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| 基金项目： | 国家支撑计划项目(2015BAC05B00)；四川省科技支撑计划项目(2014SZ0057)；川西北高寒草地沙化防治新模式的研究与示范(2014SZ0159) |
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| 摘 要： | 为探究草地沙化对川西北高寒草地土壤可溶性有机氮及酶活性的影响,采用样地调查方法,研究了不同沙化程度草地可溶性有机氮、脲酶、蛋白酶、硝酸还原酶及精氨酸脱氨酶的变化特征。结果表明:随草地沙化程度加剧,土壤脲酶、蛋白酶、硝酸还原酶及精氨酸脱氨酶活性显著降低。与未沙化草地相比,重度沙化草地0~20cm土层脲酶、蛋白酶、硝酸还原酶及精氨酸脱氨酶活性分别降低了40.54%、30.68%、39.85%和44.00%;土壤可溶性有机氮随沙化程度增加呈下降趋势,相较于未沙化,轻度沙化、中度沙化和重度沙化草地土壤可溶性有机氮含量分别下降了22.36%、48.72%和67.77%,且0~20 cm土层变化最为显著。相关分析结果表明,酶活性与土壤氮素呈极显著正相关;硝酸还原酶与铵态氮、硝态氮、微生物量氮和可溶性有机氮的相关系数最高,分别达到0.868、0.850、0.789和0.701。
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| 关 键 词： | 川西北草地；沙化；可溶性有机氮；土壤酶 |
Soil dissolved organic nitrogen and enzyme activities at different desertification grasslands in Northwest Sichuan |
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| SHU Xiang-yang,HU Yu-fu,YANG Yu-shan,HE Ji,SHE Shu-feng,JIA An-du,JIANG Zheng-bo,SUN Jin-yang. Soil dissolved organic nitrogen and enzyme activities at different desertification grasslands in Northwest Sichuan[J]. Agricultural Research in the Arid Areas, 2018, 36(1): 66-71 |
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| Authors: | SHU Xiang-yang HU Yu-fu YANG Yu-shan HE Ji SHE Shu-feng JIA An-du JIANG Zheng-bo SUN Jin-yang |
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| Affiliation: | College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, China,College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, China,College of Management, Sichuan Agricultural University, Chengdu, Sichuan 611130, China,College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, China,College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, China,College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, China,College of Resources, Sichuan Agricultural University, Chengdu, Sichuan 611130, China and College of Management, Sichuan Agricultural University, Chengdu, Sichuan 611130, China |
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| Abstract: | |
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| Keywords: | grasslands in northwest Sichuan desertification dissolved organic nitrogen soil enzyme |
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