| Effects of straw deep returning on soil structure moisturein semiarid region of Northeast China |
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| DOI：10.7606/j.issn.1000-7601.2014.02.009 |
| Key Words: straw deep returning soil structure soil aggregate particle soil moisture |
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| Abstract: |
| A field experiment was conducted to explore the effects of strawdeep returning on soil structure and moisture in semiarid region of Northeast China. Results indicated a marked influence of straw deep returning on soil structure and moisture distribution. Soil bulk density of the control treatment of three-year returning was 1.34 g·cm-3. The average bulk density of each treatment was 1.34 g·cm-3. Soil bulk density decreased significantly, in particular >5 mm aggregate particles accounting for 18.69%～27.20%. Results revealed improved ability to resist external force damage, increased mean weight diameter and geometric and reduction of water-stable aggregates
stability rate and soil structure breakage for the treatment of returning 800 kg·hm-2. In addition, soil water holding capacity was higher than the control treatment. |