| Effects of different conservation tillage measures on soil fertility, WUE and yield in winter wheat-spring maize rotation field of Weibei Highland |
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| DOI：10.7606/j.issn.1000-7601.2011.04.37 |
| Key Words: Weibei Highland conservation tillage crop rotation soil nutrient water use efficiency yield |
| Author Name | Affiliation | | ZHANG Lihua | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Jun | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | JIA Zhikuan | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIU Bingfeng | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | ZHAO Hongli | College of Agronomy, Northwest A & F University, Yangling, Shaanxi 712100, China | | SHANG Jinxia | College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| A continuous experiment was conducted in Weibei Highland in 2007～2010 to investigate effects of three soil conservation tillage measures, namely no-tillage(NT), sub-soiling(SS) and deep-ploughing(DP), on soil nutrient, water use efficiency (WUE) and crop yields under the rotation mode of winter wheat→spring maize, combined with balance fertilization, traditional fertilization and no (or low) fertilization treatments. The results indicated that, the nutrient of loam increased with the implementation of conservation tillage measures; the sequence of the soil organic matter content changed from NT＞SS＞DP at the beginning of the experiment gradually into SS＞NT＞DP; and the content of alkali-hydro nitrogen, available P content and available K in surface soil under balanced fertilization condition was in order of NT＞SS＞DP, and that under conventional fertilization condition and low (no) fertilization condition was SS＞NT＞DP, while that in SS treatment under both balanced fertilization and conventional fertilization conditions was the highest one of three different tillage treatments in middle of soil; the WUE and crop yields of rotation field were in order of SS＞DP＞NT in the same fertilization treatment, and that under BSS (balanced fertilization and sub-soiling) treatment combination was the highest one of 9 treatments, BDP(balanced fertilization and deep ploughing) treatment combination was in the second place. No matter combination with any fertilization treatment of the rotation mode of winter wheat-spring maize, sub-soiling tillage improved the soil nutrient, fertilizer use efficiency, WUE and crop yield significantly. |
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