An Experimental Study of Straw Mulching Effects in Water and Salt in Saline Soils

SUN Bo; XIE Jian-cang; WANG Ni; ZHU Ji-wei; ZHANG Jian-long; LI Chun-jiao

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An Experimental Study of Straw Mulching Effects in Water and Salt in Saline Soils

- An Experimental Study of Straw Mulching Effects in Water and Salt in Saline Soils
- Bulletin of Soiland Water Conservation Vol. 30, Issue 3, Pages: 48-51(2011)
- 作者机构：
  
  1. 西安理工大学水利水电学院,陕西,西安,710048
  2. 辽宁省国土资源厅信息中心,辽宁,沈阳,110032
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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SUN Bo, XIE Jian-cang, WANG Ni, et al. An Experimental Study of Straw Mulching Effects in Water and Salt in Saline Soils[J]. Bulletin of Soiland Water Conservation, 2011, 30(3): 48-51.
DOI：

SUN Bo, XIE Jian-cang, WANG Ni, et al. An Experimental Study of Straw Mulching Effects in Water and Salt in Saline Soils[J]. Bulletin of Soiland Water Conservation, 2011, 30(3): 48-51. DOI：

摘要

研究了不同秸秆覆盖量处理对盐渍化土壤蒸发量、含水率及含盐量动态变化的影响。结果表明，(1)随着秸秆覆盖量增加，土壤蒸发量逐渐减少，当秸秆覆盖量为7500 kg/hm

时，日蒸发量减少幅度趋于稳定。(2)秸秆覆盖量为10500，7500，4500，1500 kg/hm

时，蒸发抑制率依次为80.54%，79.01%，62.45%，37.93%。(3)随着秸秆覆盖量增加，不同土层含水率逐渐增加。当秸秆覆盖量为7500kg/hm

时，0-10cm土层含水率达到最大值，比对照实验增加了9.28%;0-10cm土层含盐量下降幅度最大，含盐量减少了3.21%。因此，秸秆覆盖盐渍土壤能够减少土壤水分蒸发损失，提高水分利用效率，抑制盐渍化土壤可溶性盐分的表聚作用，对改良盐渍化土壤具有显著效果。

Abstract

The dynamic changes of saline soil evaporation

water content and salinity in response to straw mulching were investigated. T he results showed that

(1) soil evaporation decreased with the increase of straw mulching

however

the reduction efficiency of the straw mulching remained steady when straw mulching quantity was over 7500 kg/hm2;( 2) evaporation inhibition rate were 80.54%

79.01%

62.45 %

and 37.93%

with straw mulching of 10500 kg/hm2

7500kg/ hm2

4500 kg/hm2

and 1500 kg/hm2

respectively;(3)the watercontents of soil layers increased with the amounts of straw mulching. When straw mulching was 7500 kg/hm2

the water content reached its maximum and the salinity approached its lowest level in the soil layer of 0-10 cm

with an increase of 9. 28% and a reduction of 3. 21% comparing to the control

respectively. Therefore

straw mulching on saline soils can potentially reduce water loss through evaporation

enhance water use efficiency

inhibit surface salt accumulation

and then significantly improve soil quality of saline soils.

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