| 退化草地土壤农化性状与微生物区系研究 |
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| 引用本文： | 龙章富,刘世贵.退化草地土壤农化性状与微生物区系研究[J].土壤学报,1996,33(2):192-200. |
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| 作者姓名： | 龙章富 刘世贵 |
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| 作者单位： | 四川省农业科学院土肥所, 成都 610066;四川大学生物工程系, 成都 |
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| 摘 要： | 通过对三种退化程度不同的草地土壤农化性状与微生物区系进行研究，结果表明，草地退化后，其土壤肥力水平、土壤微生物数量和微生物种类有随退化程度增高而下降的趋势；退化草地存在不同的程度的营养元素比例失调，表现为少氮、缺磷、富钾和高有机质含量，且退化程度接近的草地间，在土壤微生物区系和农化性状有部分类似的特征。
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| 关 键 词： | 退化草地 土壤农化性状 微生物区系 草地 |
| 收稿时间： | 1994/12/7 0:00:00 |
SOIL AGROCHEMICAL PROPERTIES AND MICROBIOTA OF DERADED GRASSLANDS |
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| Long Zhangfu and Liu Shigui.SOIL AGROCHEMICAL PROPERTIES AND MICROBIOTA OF DERADED GRASSLANDS[J].Acta Pedologica Sinica,1996,33(2):192-200. |
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| Authors: | Long Zhangfu and Liu Shigui |
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| Institution: | Soil and Fertilizer Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610066;Department of Biological Engineering, Sichuan University Chengdu |
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| Abstract: | The soil agrochemical properties and microbiota of three degraded grasslands (Kobresia pygmaea meadow,Dasiphora fruticosa shrub and Festuca sinensis grassland) were studied.The main results are summarized as flliows:(1) There existed obvious vertical distribution of the contents of N,P,K,organic matters and pH value as well as microorganism numbers in the soils.Soil agrochemical properties were significantly correlated with soil microorganism numbers.(2) Soil fertility and the numbers of soil microorganisms,decreased with grassland degradation.(3) N and P were deficient but K and organic matter were rich in soils of the three degraded grasslands.And (4) The soil microbiota varied obviously with grassland degradation.Weakly degraded grassland had more soil microorganism genera than the strongly degraded one,and the microbiota were similar in the grasslands with the similar degradation degrees. |
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| Keywords: | Degraded grassland Soil microbiota Soil agrochemical properties |
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