Improvement Effects of Soil Amendments on Soil Water Retention Capacity in Loessial Soil

CAO Li-hua; LIU He-man; ZHAO Shi-wei

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Improvement Effects of Soil Amendments on Soil Water Retention Capacity in Loessial Soil

- Improvement Effects of Soil Amendments on Soil Water Retention Capacity in Loessial Soil
- Bulletin of Soiland Water Conservation Vol. 28, Issue 1, Pages: 133-137(2009)
- 作者机构：
  
  1. 西藏大学农牧学院资源与环境系,西藏,林芝,860000
  2. 中国科学院水利部水土保持研究所, 陕西杨凌,712100
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2009
- 稿件说明：
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CAO Li-hua, LIU He-man, ZHAO Shi-wei. Improvement Effects of Soil Amendments on Soil Water Retention Capacity in Loessial Soil[J]. Bulletin of Soiland Water Conservation, 2009, 28(1): 133-137.
DOI：

CAO Li-hua, LIU He-man, ZHAO Shi-wei. Improvement Effects of Soil Amendments on Soil Water Retention Capacity in Loessial Soil[J]. Bulletin of Soiland Water Conservation, 2009, 28(1): 133-137. DOI：

摘要

通过室内土柱培养

研究了PAM、沃特保水剂、β-环糊精、腐殖酸对黄绵土持水性能的改良效果。结果表明

不同改良剂在不同浓度下的土壤水分特征不同

但都符合土壤含水量与土壤吸力之间的关系式;在浓度0.05%-0.4%时

在同一改良剂处理下a值的大小变化规律是随浓度的增加而增大

即:0.4%>0.2%>0.1%>0.05%>CK;在同一浓度下

不同改良剂在培养3周和2个月时

不同改良剂处理下的a值的大小为PAM>沃特保水剂>β-环糊精>腐殖酸;在培养4个月后

在浓度<0.2%时

a值的大小变化规律为:PAM>沃特保水剂>β-环糊精>腐殖酸;在浓度0.2%-0.4%时

a值的大小变化规律为:PAM>沃特保水剂>腐殖酸>β-环糊精。

Abstract

The effects of four soil amendments (PAM

β-cyclodextrin

Wote super absorbent

and humic acid) on soil water retention capacity of Loessial soil are studied in a soil column experiment. Results show that the effects of the amendments on Loessial soil all conform to the equation for soil water content and soil suction. Under the condition of a single amendment

a value is increased with the amendment concentration in the range of 0.05%-0.4%. After 3 weeks or 2 months

a value also changes with the same amendment concentration in the amendment order of PAM > Wote super absorbent > β-cyclodextrin > humic acid. After 4 months

the order is PAM > Wote super absorbent > β-cyclodextrin > humic acid if concent ration is < 0.2% and the order becomes PAM > Wote super absorbent > humic acid > β-cyclodextrin if concentration is 0.2%- 0.4%.

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