| Effects of rotation tillage patterns on soil aggregates stability and soil structure of the dry land in winter and spring fallow period |
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| DOI：10.7606/j.issn.1000-7601.2017.06.08 |
| Key Words: rotational tillage soil aggregates mean weight diameter (MWD) geometric mean diameter (GMD) soil bulk density soil proosity |
| Author Name | Affiliation | | ZHAO Ji | Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China | | WANG Wei | Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China
Xuanhua Vocational College of Science and Technology, Hebei, Zhangjiakou, 075100, China | | ZHANG Peng | Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China | | HOU Xian-qing | Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China | | JIA Zhi-kuan | Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China | | HAN Qing-fang | Key Laboratory of Crop Physiological Ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture/College of Agronomy, Northwest A＆F University, Shaanxi, 712100, China |
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| Abstract: |
| To further explore the reasonable farming system in semiarid area, the effects of rotation tillage patterns on soil aggregates stability and soil structure of the dry land in winter and spring fallow period were conducted in south Ningxia from 2007 to 2010. There were four tillage treatments: no-tillage→subsoiling tillage→subsoiling tillage (N/S/S), subsoiling tillage→subsoiling tillage→no-tillage (S/N/N), no-tillage→no-tillage→no-tillage (NT) and conventional tillage (CT) as control. The effects of different tillage patterns on soil porosity, composition and stability of soil aggregate were examined. The results showed that in 0～20 cm soil layer， the soil bulk density and the soil porosity of N/S/S was significantly (P＜0.05) decreased by 2.5%～3.1% compared with CT and NT. The soil porosity in 20～40 cm soil layer of N/S/S was significantly increased by 2.8% compared with S/N/N (P＜0.05). NT and S/N/N treatments were higher content of mechanically stable aggregates, water-stable aggregates, mean weight diameter (MWD) and geometric mean diameter (GMD) than CT in 0～40 cm soil layer. No-tillage more than two consecutive years（NT and S/N/N）could increase the mean weight diameter (MWD) and geometric mean diameter (GMD) of soil aggregates, and decreased the destruction rate of aggregate, which could improved the soil structure stability and increased soil aggregates contents in semiarid regions. |
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