| 喀斯特山区不同草地土壤养分与酶活性特征 |
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| 引用本文： | 黄玙璠,舒英格,肖盛杨,陈梦军.喀斯特山区不同草地土壤养分与酶活性特征[J].草业学报,2020,29(6):93-104. |
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| 作者姓名： | 黄玙璠 舒英格 肖盛杨 陈梦军 |
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| 作者单位： | 贵州大学农学院,贵州 贵阳 550025 |
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| 基金项目： | 国家自然科学基金项目(31460133)资助 |
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| 摘 要： | 为探究喀斯特山区植被恢复过程中不同草地的土壤性质,研究了贵州喀斯特山区不同草地土壤酶活性和土壤养分含量的变化规律。结果表明:土壤酶活性和土壤养分含量随着土层厚度增加而减少;过氧化氢酶和磷酸酶活性在3种草地中的变化趋势为林草间作地>荒草地>退耕还草地,脲酶活性在0~10 cm土层的变化趋势为林草间作地>荒草地>退耕还草地,10 cm以下土层的变化趋势为林草间作地>退耕还草地>荒草地,蔗糖酶活性为荒草地>林草间作地>退耕还草地,蛋白酶活性为林草间作地>退耕还草地>荒草地,多酚氧化酶活性在3种草地中的变化各异;土壤养分含量在3种草地土壤中表现为林草间作的高于荒草地和退耕还草地。相关性分析得出:不同草地土壤养分含量与土壤酶活性的关系不同,正负兼有。研究结果表明:随着地表植被逐渐恢复、生物多样性逐渐增加的林草间作地土壤酶活性与土壤养分含量都较高,喀斯特山区生态环境逐渐得到了改善。
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| 关 键 词： | 喀斯特山区 草地 植被恢复 土壤酶 土壤养分 |
| 收稿时间： | 2019-12-02 |
| 修稿时间： | 2020-02-01 |
Quantification of soil nutrient levels and enzyme activities in different grassland categories in karst mountains |
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| HUANG Yu-fan,SHU Ying-ge,XIAO Sheng-yang,CHEN Meng-jun.Quantification of soil nutrient levels and enzyme activities in different grassland categories in karst mountains[J].Acta Prataculturae Sinica,2020,29(6):93-104. |
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| Authors: | HUANG Yu-fan SHU Ying-ge XIAO Sheng-yang CHEN Meng-jun |
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| Institution: | College of Agriculture, Guizhou University, Guiyang 550025, China |
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| Abstract: | In order to explore the soil properties of different grassland categories (wild grassland, farmland reverting to grassland, forest-grass intercropping land) in karst mountains, this study focuses on the changes in soil enzyme activity and soil nutrient content of different grasslands in Guizhou province. As expected, it was found that soil enzyme activity and soil nutrient content decrease with increasing soil depth. The ranking for catalase and phosphatase activities in the three grassland categories was: forest-grass intercropping land>wild grassland>farmland reverting to grassland. The ranking for urease activity in the 0-10 cm soil layer was as for phosphatase and catalase, while urease activities in the soil layer below 10 cm ranked: forest-grass intercropping land>farmland reverting to grassland>wild grassland, and the invertase activities ranked: wild grassland>forest and grass intercropping land>farmland reverting to grassland. The protease activity ranked: forest-grass intercropping land>farmland reverting to grassland>wild grassland. The soil polyphenol oxidase activity in the three grassland categories varied. The soil nutrient levels in the forest-grass intercropping land were higher than those of wild grassland and farmland reverting to grassland. It was found that the correlation between soil nutrient levels and soil enzyme activities differed in different grassland categories, being sometimes positive and sometimes negative. In summary, with the gradual restoration of surface vegetation and associated increase in biodiversity, the soil enzyme activities and soil nutrient levels in the forest grass intercropping land were higher, and the ecological environment in the karst mountain area is shown to have been gradually improved. |
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| Keywords: | karst mountains grasslands vegetation restoration soil enzymes soil nutrients |
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