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locust forest
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  刺槐
    The amount of bacteria and fungi increased at first,then decreased and eventually increased again after 40 years' restore in man-made locust forest soils.
    人工刺槐恢复林细菌与真菌数量,随种植年限增长呈现为先增加后减少,到40年时再增加的变化规律;
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The relationship was studied between soil microbial population and soil fertility under different vegetation restoring ways in loess regions.The results were as follows:soil fertility and soil microbial population had improved remarkably after restoring 30 years,such as soil organic matter,total nitrogen,available nitrogen,available potassium and microorganism.The amount of bacteria and fungi increased at first,then decreased and eventually increased again after 40 years' restore in man-made locust forest...

The relationship was studied between soil microbial population and soil fertility under different vegetation restoring ways in loess regions.The results were as follows:soil fertility and soil microbial population had improved remarkably after restoring 30 years,such as soil organic matter,total nitrogen,available nitrogen,available potassium and microorganism.The amount of bacteria and fungi increased at first,then decreased and eventually increased again after 40 years' restore in man-made locust forest soils.There was no obviously change in amount of antinomyce.Correlation analyses showed that there was significant correlation between the amount of bacteria and soil properties(such as soil organic matter,total N,available P and available K),the amount of fungi and soil organic matter,total N.But there was no significant correlation between actinomyces and soil properties.Principal component analysis showed total microbial population can be an index to evaluate vegetation restored precess and soil quality.

对黄土丘陵区不同植被恢复模式下土壤理化性状及微生物数量研究表明:植被恢复30年后土壤理化性状和微生物数量都得到明显改善,土壤有机质、全氮、碱解氮、速效钾含量以及微生物数量显著增加;人工刺槐恢复林细菌与真菌数量,随种植年限增长呈现为先增加后减少,到40年时再增加的变化规律;放线菌数量变化规律不明显。相关性分析显示细菌数量和有机质、全氮、碱解氮和速效钾相关性显著,真菌数量和有机质、全氮相关性显著,而放线菌数量与土壤肥力指标相关性不显著。主成分分析揭示出微生物数量可作为评价植被改善土壤质量的指标。

 
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