| Effects of straw mulching quantity on soil water use and spring maize yield |
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| DOI：10.7606/j.issn.1000-7601.2012.01.19 |
| Key Words: dry farmland of southern Ningxia straw mulching quantity soil moisture yield spring maize |
| Author Name | Affiliation | | GAO Fei | Research Institute of Water saving Agriculture in Chinna’s Arid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, China | | JIA Zhikuan | Research Institute of Water saving Agriculture in Chinna’s Arid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, China | | HAN Qingfang | Research Institute of Water saving Agriculture in Chinna’s Arid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, China | | LI Yongping | Guyuan Institute of Agricultural Sciences, Guyuan, Ningxia 756000, China | | YANG Baoping | Research Institute of Water saving Agriculture in Chinna’s Arid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, China | | HOU Xianqing | Research Institute of Water saving Agriculture in Chinna’s Arid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, China | | LU Wentao | Research Institute of Water saving Agriculture in Chinna’s Arid Areas, Northwest A & F University, Yangling, Shaanxi 712100, China
Key Laboratory of Crop Production and Ecology, Ministry of Agriculture, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to determine the appropriate straw mulching quantity in semiarid areas, a cultivation experiment of spring maize with straw mulching was conducted in the semiarid area of Ningxia. Four different treatm
ents of straw mulching quantities (0 kg/hm2, 4 500 kg/hm2, 9 000 kg/hm2 and 13 500 kg/hm2) were adopted in field experiment, and an analysis of soil water, spring maize yield and water use efficiency (WUE) was made. In the maize growth period of 4 year experiment, compared with CK (no coverage), average soil water storage amount in 0～200 cm soil layers under all straw mulching treatments (follow the amount of straw mulching from high to low) increased by 15.47 mm, 10.79 mm and 6.26 mm (P<0.05) respectively. During the experiment, the lowest precipitation of growth period was in 2009 (266.1 mm), when maize production increased by 13.10％, 17.37％ and 5.40％ (P＜0.05) respectively; and the h
ighest precipitation of growth period was in 2010 (433.6 mm), when maize production increased by 3.91％, 7.58％ (P＜0.05) and 1.70％ respectively. The treatments of 9 000～13 500 kg/hm2 had distinct yield-increasing effect, and the average yield of 4 years increased by 14.23％～12.03％ and water use efficiency increased by 10.64％～8.87％. In the semiarid area of southern Ningxia, the use of straw mulching amount of 9 000 kg/hm2 could play an active role in the preservation of soil moisture, promote a virtuous cycle of soil moisture, and increase maize yield and maize water use efficiency significantly. |
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