| Study on soil moisture effect of double cropping in the dryland of subhumid areas of the Loess Plateau |
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| DOI：10.7606/j.issn.1000-7601.2010.04.27 |
| Key Words: dry fammland double-cropping system soil water water use |
| Author Name | Affiliation | | LI Lu | College of Forestry, Northwest A & F University, Yangling， Shaanxi 712100, China | | YANG Ling | College of Forestry, Northwest A & F University, Yangling， Shaanxi 712100, China | | LIAO Yuncheng | College of Agronomy，Northwest A & F University, Yangling, Shaanxi 712100, China | | WEN Xiaoxia | College of Agronomy，Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In this study, with winter wheat-summer fallow cropping pattern as control, we compared the soil water
dynamics, water consumption and crop yield of different cropping patterns. The purpose of the research was to find out soil water dynamics，water consumption law, and to reveal the influence mechanism of different cropping patterns on the soil water of two crops a year on dry farmland. The result indicated that planting two crops in a year could get better WUE and economic retum, the WUE and economic returm of the 4 multiple gropping pattem increased by 48.4%~107.5% and 62.3%~119.2% . The influence extent of multiple cropping on the soil water state was limited, and the daily water consumption of treatment I，treatment I and treatment IV were only higher by 0.05 mm/d, 0.07 mm/d.
and 0.09 mm/d. Comprehensive analysis of economic benefit and soil water sustainable utilization，the pattem of “wheat-corm”obtained the best economic yield and profit, and the “wheat-soybean”was the second, but this cropping system consumed less soil water than that of “wheat-corn”. |
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