| Effects of different straw mulching quantity on soil water and WUE in semiarid region |
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| DOI：10.7606/j.issn.1000-7601.2009.04.38 |
| Key Words: spring maize straw mulching quantity soil water content water use efficiency |
| Author Name | Affiliation | | WANG Xin | The Agriculture Research Center in Arid and Semiarid Areas of Northwest A & F University, Key Laboratory of Crop Production and Ecology of Agricultural Ministry, Yangling, Shaanxi 712100, China | | JIA Zhikuan | The Agriculture Research Center in Arid and Semiarid Areas of Northwest A & F University, Key Laboratory of Crop Production and Ecology of Agricultural Ministry, Yangling, Shaanxi 712100, China | | HAN Qingfang | The Agriculture Research Center in Arid and Semiarid Areas of Northwest A & F University, Key Laboratory of Crop Production and Ecology of Agricultural Ministry, Yangling, Shaanxi 712100, China | | YANG Baoping | The Agriculture Research Center in Arid and Semiarid Areas of Northwest A & F University, Key Laboratory of Crop Production and Ecology of Agricultural Ministry, Yangling, Shaanxi 712100, China | | NIE Junfeng | The Agriculture Research Center in Arid and Semiarid Areas of Northwest A & F University, Key Laboratory of Crop Production and Ecology of Agricultural Ministry, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The study on the effects of different straw mulching quantity (0, 4 500, 9000 and 13 500 kg/hm2) on soil water and water use efficiency of spring maize was conducted in semiarid area of Ningxia from 2007 to 2008. The results showed that the effects of straw mulching treatments on soil water varied in different crop growth stages and soil layers. Straw mulching treatment of 9 000 kg/hm2 had significant effect on soil water content of 0～40 cm soil layer compared with CK (P<0.05), and the soil water content increased by 14.2%. The treatment of 13 500 kg／hm2 raised soil water content insignificantly compared with treatment of 9 000 kg/hm2. 9 000～13 500 kg/hm2 treatments could increase the yield by 16.9％ (P<0.01), water use efficiency of spring maize increased by 4.3～5.6 kg／(mm·hm2) compared with CK (P<0.01). |
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