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首页> 外文期刊>土壤圈（英文版） >Soil Biological Changes for a Natural Forest and Two Plantations in Subtropical China
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Soil Biological Changes for a Natural Forest and Two Plantations in Subtropical China

机译：亚热带天然林和两种人工林的土壤生物学变化

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Conversion of natural forests into pure plantation forests is a common management practice in subtropical China.To evaluate the effects of forest conversion on soil fertility, microbe numbers and enzyme activities in topsoils (0-10 cm)were quantified in two 33-year-old monoculture plantations of Castanopsis kawakamii Hayata (CK) and Cunninghamia lanceolata Lamb. (Chinese fir) (CF), and compared to a neighboring relict natural C. kawakamii forest (NF), in Sanming,Fujian. Five soil samples were collected once each in January, April, July, September and November in 2000 in each forest for laboratory analysis. Over the sampling year, there were significant differences for bacteria, fungi and actinomycetes between forests and between seasons (P ＜ 0.05). The largest bacteria and fungi populations were in NF, while CF contained the greatest number of actinomycetes. There were also significant differences (P ＜ 0.05) with microbial respiration for forests and seasons. Additionally, compared with NF, urease and acid phosphatase were significantly lower (P ＜ 0.05)in CK and CF. Also, the correlations of soil hydrolysable N and available P to soil microbial and enzymatic activities were highly significant (P ＜ 0.01). Thus, to alter the traditional Chinese fir monoculture so as to mimic the natural forest conditions, managing mixed stands of Chinese fir and broadleaf trees or conducting crop rotation of conifers and broadleaf trees as well as minimizing forest disturbances like clear-cutting, slash burning and soil preparing, could be utilized.
机译：在亚热带地区，天然林转换为纯人工林是一种常见的管理方式。为评估森林转换对土壤肥力的影响，对两个33岁的表土（0-10厘米）中的微生物数量和酶活性进行了量化。 ano锥栗（Castanopsis kawakamii Hayata）和杉木（Cunninghamia lanceolata Lamb）的单种人工林。 （杉木）（CF），并与福建省三明市的一个邻近遗迹天然卡哇伊茶树（NF）进行了比较。 2000年1月，4月，7月，9月和11月分别在每个森林中收集了五个土壤样品，用于实验室分析。在抽样年中，森林之间和季节之间的细菌，真菌和放线菌之间存在显着差异（P ＜0.05）。最大的细菌和真菌种群位于NF，而CF包含最多的放线菌。森林和季节的微生物呼吸也有显着差异（P ＜0.05）。另外，与NF相比，CK和CF的脲酶和酸性磷酸酶含量显着降低（P ＜0.05）。另外，土壤可水解氮和速效磷与土壤微生物和酶活性的相关性极高（P ＜0.01）。因此，为了改变传统的杉木单一栽培方式，以模仿自然的森林条件，管理杉木和阔叶树的混交林，或进行针叶树和阔叶树的作物轮作，并最大程度地减少森林砍伐，砍伐和砍伐等森林干扰。可以利用整地。

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