| Effects of fertilizer application rates on soil water use and wheat yield under ridge-furrow practice with plastic mulching of the ridge |
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| DOI：10.7606/j.issn.1000-7601.2016.01.15 |
| Key Words: ridge and furrow rainfall harvesting planting pattern fertilizer application levels soil moisture rainfed wheat yield semiarid areas |
| Author Name | Affiliation | | WANG Ke | The Chinese Institute of Water-saving Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture, Yangling, Shaanxi 712100, China | | WEI Ting | The Chinese Institute of Water-saving Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture, Yangling, Shaanxi 712100, China | | DONG Zhao-yun | The Chinese Institute of Water-saving Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture, Yangling, Shaanxi 712100, China | | ZHANG Peng | The Chinese Institute of Water-saving Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture, Yangling, Shaanxi 712100, China | | JIA Zhi-kuan | The Chinese Institute of Water-saving Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Physi-ecology and Tillage in Northwestern Loess Plateau, Minister of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The objective of this study was to explore the effects of the different chemical fertilizer application levels on soil moisture, grain yield, water use efficiency (WUE) and fertilizer agronomic efficiency(AE) under Ridge-furrow Rainfall Harvesting Planting pattern. A 2-year field experiment was conducted in semi-arid areas of southern Ningxia from Sept. 2012 to June 2014. Two cultivation patterns (R: ridge-furrow cultivation and F: conventional flat cultivation) and four chemical fertilizer rates (H: 270+180 kg·hm-2, M: 180+120 kg·hm-2, L: N+P: 90+60 kg·hm-2, 0) were performed in this study. The results showed that soil water storages at 0～200 cm layers were significantly higher in R treatments than that of B treatments at the early growth stage of winter wheat. Yield, WUE and AE of wheat were larger in R, which were 10.57% (P<0.05), 3.83% and 54.99% (P<0.05) higher than that of B, respectively. Fertilization had significant effect on soil water storage during wheat growth period. At the early growth stage of winter wheat, soil water storage increased as fertilizer level increased. At late growth stage, soil water storage decreased as fertilizer level increased. Under both cultivation patterns, yield and WUE of winter wheat increased with the rising of fertilizer application. However, the increase amplitude of yield and WUE between adjacent fertility gradient became smaller gradually with the increasing of fertilizer application. RH was the recommended treatment in terms of yield and WUE. AE of wheat was the largest in RM which averaged 3.91 kg·kg-1 in two trial years. Therefore, the ridge-furrow rainfall harvesting planting pattern with middle fertilizer application (180+120 kg·hm-2) could significantly increase grain yield and WUE of winter wheat. |
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