Effects of straw mulching on soil evaporation during the soil thawing period in a cold region in northeastern China

被引：26

作者：

Fu, Qiang ^{[1
]}

Yan, Peiru ^{[1
]}

Li, Tianxiao ^{[1
]}

Cui, Song ^{[1
]}

Peng, Li ^{[1
]}

机构：

[1] Northeast Agr Univ, Coll Water Conservancy & Civil Engn, Harbin 150038, Heilongjiang, Peoples R China

来源：

JOURNAL OF EARTH SYSTEM SCIENCE | 2018年 / 127卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Straw mulching; soil water evaporation; soil thawing period; freezing depth; soil liquid water content; WATER-USE EFFICIENCY; TRITICUM-AESTIVUM L; LOESS PLATEAU; WINTER-WHEAT; MAIZE YIELD; NORTH CHINA; IRRIGATION; TEMPERATURE; GROWTH; ENVIRONMENT;

D O I：

10.1007/s12040-018-0933-4

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

To study the effect of straw mulching on soil water evaporation, it is necessary to measure soil water evaporation under different conditions of straw mulching during the soil thawing period. A field experiment was conducted in winter, and soil evaporation was measured using a microlysimeter on bare land (LD) and 4500 (GF4500), 9000 (GF9000) and 13500 (GF13500) straw mulch. The influence of different quantities of straw mulch on soil water evaporation during the thawing period was analyzed using the Mallat algorithm, statistical analysis and information cost function. The results showed that straw mulching could delay the thawing of the surface soil by 3-6 d, decrease the speed at which the surface soil thaws by 0.40-0.80 cm/d, delay the peak soil liquid water content, increase the soil liquid water content, reduce the cumulative evaporation by 2.70-7.40 mm in the thawing period, increase the range of soil evaporation by 0.04-0.10 mm in the early stage of the thawing period, and reduce the range of soil evaporation by 0.25-0.90 mm in the late stage of the thawing period. Straw mulching could reduce the range of and variation in soil evaporation and can reduce the effect of random factors on soil evaporation. When the amount of straw mulch exceeded 9000 , the effect of increasing the amount of straw mulch on daily soil water evaporation was small.

引用

页数：12

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