| Effects of different tillage and fertilization combinations on soil water conservation and yield increment in Weibei Highland |
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| DOI：10.7606/j.issn.1000-7601.2016.02.04 |
| Key Words: spring maize fertilization level conservation tillage soil water yield Weibei Highland |
| Author Name | Affiliation | | SI Zheng-bang | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | LI Jun | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHOU Ting-ting | College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The objective of this study was to reveal the effects of different conservative tillage practices during winter fallow on soil moisture conservation and yield improvement of spring corn in Weibei Highland, and to find a proper regime of tillage practice and fertilization level for spring corn in this region. A two-year field experiment was conducted to investigate the effects of three different tillage practices combined with fertilization, namely, conventional farmer pattern (deep ploughing plus low fertilization level, S1), existent highly efficient pattern (no-tillage plus high fertilization level, S2) and innovative highly efficient pattern (sub-soiling plus moderate fertilization level, S3), on water utilization, grain yield and economic benefits of spring corn. The results indicated that water storage of S3 and S2 before sowing were higher than that of S1. Compared with S1, the average 0～200 cm soil water storages during the whole growth period, water use efficiencies and grain yields by S3 and S2 were increased by 23.3 mm and 18.1 mm, 12.3% and 10%, 11.1% and 9.2%, respectively. S3 and S2 performed better than S1 in improvement of water storage, WUE, grain yield and economic benefits. In conclusion, S3 treatment is a proper water and fertilizer management pattern for spring corn in Weibei Highland. |
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