| Effects of no-tillage on soil physical properties and crop yields |
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| DOI：10.7606/j.issn.1000-7601.2010.05.07 |
| Key Words: no-tillage soil aggregate soil porosity hydrothermal change crop yield |
| Author Name | Affiliation | | GUO Xiaoxia | Agronomy College, Inner Mongolia Agricultural University, Huhhot 010019, China | | LIU Jinghui | Agronomy College, Inner Mongolia Agricultural University, Huhhot 010019, China | | ZHANG Xingjie | Agronomy College, Inner Mongolia Agricultural University, Huhhot 010019, China | | LI Lijun | Agronomy College, Inner Mongolia Agricultural University, Huhhot 010019, China | | CHEN Qin | Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta T1J4B1, Canada | | Surya N. ACHARYA | Agriculture and Agri-Food Canada Research Centre, Lethbridge, Alberta T1J4B1, Canada |
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| Abstract: |
| An experiment about the effects of different methods of crop rotation under no-tillage on soil physical properties and crop yields had been carried out in Qing Shuihe County in semiarid area of the Yellow River valley. Soil aggregate structure, total porosity, climate evolvement of water-heat and crop yields were determined. The results showed that after three years of no-tillage and rotation, soil aggregate structure, total porosity and water content all increased year by year, especially the treatment of stubble mulching. The amount of 0.25～0.5 mm soil aggregates is the largest under straw mulch, while the highest value is in 0.1～0.25 mm soil aggregates under conventional tillage and stubble without mulch. It showed that stubble mulch was helpful to form macro-aggregates; Stubble without mulch had a large improvement in soil microstructure-forming. At the same time, soil total porosity in different years revealed an order from bigger to smaller, which ranks as follows: high stubble with mulch, low stubble with mulch, high stubble, low stubble, conventional tillage. It was concluded that different methods of crop rotation under no-tillage had a positive effect on improvement of soil. During the first two years of no tillage, crop yield was unstable; but in the third year, the yield was increased. |
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