Soil Hydrological and Physical Properties for Main Patterns of Converting Farmland into Forestland in Northwest Guangxi Province

HUANG Cheng-biao; LI Bao-ping; LAI Jia-ye; ZHUANG Jia

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Soil Hydrological and Physical Properties for Main Patterns of Converting Farmland into Forestland in Northwest Guangxi Province

- Soil Hydrological and Physical Properties for Main Patterns of Converting Farmland into Forestland in Northwest Guangxi Province
- Bulletin of Soiland Water Conservation Vol. 28, Issue 3, Pages: 108-112(2009)
- 作者机构：
  
  广西大学林学院,广西,南宁,530005
- 作者简介：
- 基金信息：
- DOI：
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- Published：2009
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HUANG Cheng-biao, LI Bao-ping, LAI Jia-ye, et al. Soil Hydrological and Physical Properties for Main Patterns of Converting Farmland into Forestland in Northwest Guangxi Province[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 108-112.
DOI：

HUANG Cheng-biao, LI Bao-ping, LAI Jia-ye, et al. Soil Hydrological and Physical Properties for Main Patterns of Converting Farmland into Forestland in Northwest Guangxi Province[J]. Bulletin of Soiland Water Conservation, 2009, 28(3): 108-112. DOI：

摘要

退耕还林是退化生态系统重建的重要途径。对桂西北地区12种退耕还林模式3a植被恢复期林地土壤水文—物理性质进行了定位监测研究。结果表明，(1)不同土壤深度(0—20 cm，20—40 cm，40—100 cm)的平均土壤容重为0.824~1.256 g/cm

，分别比农作物地增大2.4%~4.4%，其中0—20 cm土层的差异达到显著水平。(2)土壤非毛管孔隙度、总孔隙度和通气度的平均值依次为1.1%~21.3%，52.4%~59.8%和28.3%~35.7%，分别比农作物地下降4.1%~20.7%，其中非毛管孔隙度0—20 cm土层的差异达到显著水平；毛管孔隙度的平均值为38.5%~41.3%，比未退耕地增大5.2%~7.6%。(3)1m土层内的最大持水量、毛管持水量、最小持水量依次为43.0%~58.3%，37.0%~48.4%和30.5%~38.2%，分别比农作物地降低1.3%~10.5%，但差异不显著。(4)1m土层退耕还林地土壤有效贮水量为1 652.6~2 294.3 t/hm

，比农作物地提高1.9%~5.9%，但两者的差异不显著。

Abstract

Converting cultivated land into forestland is an important way for the reconstruction of degraded ecosystem.Soil hydrological and physical properties on 12 converted lands in Northwest Guangxi Province after 3 year reconstruction were observed.Results showed that the averaged soil densities in different soil layers(0-20

20-40

and 40-100 cm)were 0.824~ 1.256 g/cm3

which increased by 2.4%~ 4.4%compared with cropland.Soil density within 20 cm of the surface soil reached a significant level.The averaged soil non-capillary porosity

total porosity

and ventilation were 1.1%~ 21.3%

52.4%~ 59.8%

and28.3%~ 35.7%

respectively.Soil non-capillary porosity within 20 cm of the surface soil reached a significant level.The averaged capillary porosities were 38.5%~ 41.3%

which increased by 5.2%~ 7.6%compared with original farmland.The maximum water holding capacity

the capillary water holding capacity

and the minimum water-holding capacity in the 1m layer were 43.0%~ 58.3%

37.0%~ 48.4%

and 30.5%~ 38.2%

respectively

which had no significant differences.The effective storage capacities in the 1m soil layer on converted farmland were 1652.6%~2294.3t/hm2

which increased by 1.9%~ 5.9%compared with cropland

but the differences were not significant.

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