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| Effects of planting pattern on soil moisture and drought resistance ability in red soil |
| Zhong Yijun1,2 , Wu Lin1,2 , Huang Qianru1,2 , Liao Mianqing1 , Ye Chuan 1,2 , Cheng Yanhong 1,2 , Sun Yongming 1,2 , Zhang Xinliang1 , Xiong Chungui1 |
1.Jiangxi Institute of Red Soil, 331717,Nanchang,China;
2.National Engineering and Technology Research Center for Red Soil Improvement, 331717,Nanchang,China
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Abstract The effects of different planting patterns on soil moisture and soil drought resistance ability of red soil were studied by runoff plot experiment. The results indicated that, 1) compared with planting Arachis hypogaea, soil organic matter, field capacity, total porosity of the soil when planting Boehmeria sp. were increased by 28.44% , 10.06% , and 5.65% , while soil bulk density was reduced by 7.20% ; 2) the soil moisture variation coefficient of every soil layer and the 0 - 100 cm soil where A. hypogaea was planted was generally higher than that planted with Boehmeria in the whole monitoring period, while the temporal and spatial stability of soil moisture when planting Boehmeria sp. was better than planting A. hypogaea; 3) compared with planting A. hypogaea, the 0 - 40 cm soil with Boehmeria sp. planted can prolong drought resistance time by more than 7 days; however, as the soil layer deepens, the difference tends to be unremarkable; 4) planting Boehmeria sp. can improve drought resistance ability of red soil, especially for the middle and upper layers. From the viewpoint of use of soil water, planting Boehmeria sp. outperforms planting A. hypogaea in red soil, which provides the basis for using deep water in red soil regions.
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Received: 31 May 2013
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