| Effects of different tillage on soil aggregates in the arid areas of South Ningxia |
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| DOI：10.7606/j.issn.1000-7601.2010.03.11 |
| Key Words: tillage soil aggregates the arid areas of South Ningxia |
| Author Name | Affiliation | | YAN Bo | Research center of Agriculure in Arid and Semiarid Areas, Northwoest A & F Universiy, Yangling , Shaanxi 712100, China | | JIA Zhi-kuan | Research center of Agriculure in Arid and Semiarid Areas, Northwoest A & F Universiy, Yangling , Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology，Chinese Ministry of Agriculture, Yangling, Shaanxi 712100, China | | HAN Qingfang | Research center of Agriculure in Arid and Semiarid Areas, Northwoest A & F Universiy, Yangling , Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology，Chinese Ministry of Agriculture, Yangling, Shaanxi 712100, China | | YANG Baoping | Research center of Agriculure in Arid and Semiarid Areas, Northwoest A & F Universiy, Yangling , Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology，Chinese Ministry of Agriculture, Yangling, Shaanxi 712100, China | | NE Junfeng | Research center of Agriculure in Arid and Semiarid Areas, Northwoest A & F Universiy, Yangling , Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology，Chinese Ministry of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In this study, three different tillage treatments of conventional tillage(CT), the following year no-tillage-subsoiling(NT→ST) and subsoiling-no-tillage(ST→NT) were conducted on the arid areas of South Ningxia. After 3 years of consistent tillage treatment, using dry sieving and wet sieving methods, the changing of soil aggregates was ana-lyzed and tested. The results showed that the content of > 0.25 mm mechanical aggregates in 0 ~40 cm layers of NT→
ST increased by 33.11 % and 29.51 % and ST→NT increased by 40.51 % and 36. 91 % compared with those of natural soil and CT. The content of > 0.25 mm water-stable aggregates of NT→ST in 0~ 30 cm layers increased by 7.33% compared with that of natural soil, and that in 0~10 cm layers increased by 1.47% compared with CT, but that in 10~40 cm layers had no significant difference compared with CT; Compared with those of natural soil and CT, the content of > 0.25 mm water-stable aggregates in 0~10 cm layers of ST→NT increased by 10.75% and 10.12 %. The results also show that subsoiing no-tillage(ST→NT) is more conducive to increase the stability of soil aggregates content. |
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