Changes in Soil Fertility After Grassland Reclamation to Farmland in Karst Areas of Guangxi Zhuang Autonomous Region

HU Ye-cui; LI Ying; WANG Qi-bing

doi:10.13961/j.cnki.stbctb.2014.06.066

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Changes in Soil Fertility After Grassland Reclamation to Farmland in Karst Areas of Guangxi Zhuang Autonomous Region

- Changes in Soil Fertility After Grassland Reclamation to Farmland in Karst Areas of Guangxi Zhuang Autonomous Region
- Bulletin of Soiland Water Conservation Vol. 33, Issue 6, Pages: 344-348(2014)
- 作者机构：
  
  1. 中国地质大学(北京)土地科学技术学院,北京,100083
  2. 中国科学院植物研究所,北京,100093
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.06.066
  CLC：
- Published：2014
- 稿件说明：
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HU Ye-cui, LI Ying, WANG Qi-bing. Changes in Soil Fertility After Grassland Reclamation to Farmland in Karst Areas of Guangxi Zhuang Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 344-348.
DOI：

HU Ye-cui, LI Ying, WANG Qi-bing. Changes in Soil Fertility After Grassland Reclamation to Farmland in Karst Areas of Guangxi Zhuang Autonomous Region[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 344-348. DOI： 10.13961/j.cnki.stbctb.2014.06.066.

摘要

在广西壮族自治区喀斯特地区

生态移民工程的实施致使荒草地开垦数量大幅度增加

土地的开垦必然会影响土壤的肥力质量。选择广西环江县开垦30 a

15 a玉米地及荒草地土壤为研究对象

基于空间代替时间的理论

探讨了喀斯特地区荒草地开垦对土壤肥力质量的影响。在利用相关系数确定评价因子权重

隶属度函数因子归一化

土壤质量综合评分法确定土壤肥力质量分值的基础上

运用Markov法对土壤肥力质量动态变化进行了评价。结果表明

荒草地开垦种植玉米后

0-100 cm土层的土壤肥力质量均有下降;相比15 a玉米地

30 a玉米地土壤肥力质量退化程度较低

土壤肥力质量相对较好;土壤肥力质量退化与土壤深度有关

随着深度的增加退化程度减弱;人为活动的干扰使开垦初期土壤肥力质量退化严重

但是随着开垦时间的延长土壤肥力质量有所恢复。

Abstract

With the implementation of the ecological migration project in karst area of Guangxi Zhuang Autonomous Region

a large number of grasslands were reclaimed for cultivated fields in immigration area

and land reclamation inevitably affected the the soil fertility. By choosing corn land of 30 years and 15 years and grassland as the research objects

we studied the influence of grassland reclamation on soil fertility based on the theory of space for time. Soil fertility was evaluated on the basis of determining weight of factors by means of the correlation coefficient and normalization of factors through membership function. The results showed that after grassland replaced by corn field

the soil fertility declined in 0-100 cm soil layer; The degradation of 30 years corn was less serious than that of 15 years corn

so the soil fertility of 30 years corn was better; The degradation of soil fertility related to soil depth; The degradation was most serious at the beginning of reclamation because of the interference of human activities

but soil fertility was restored with the extension of cultivation.

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references

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