| Effect of root barrier on soil moisture and wheat yield within farmland shelternet |
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| DOI：10.7606/j.issn.1000-7601.2012.01.13 |
| Key Words: farmland shelterbelt root barrier soil moisture wheat yield |
| Author Name | Affiliation | | CHEN Zuozhou | College of Water and Soil Conservation, Beijing Forestry University, Beijing, 100083, China | | ZHANG Yuqing | College of Water and Soil Conservation, Beijing Forestry University, Beijing, 100083, China | | WU Bin | College of Water and Soil Conservation, Beijing Forestry University, Beijing, 100083, China | | LI Zhipei | College of Water and Soil Conservation, Beijing Forestry University, Beijing, 100083, China | | GENG Xiangguo | Hydrochina Kunming Engineering Corporation, Kunming, Yunnan 650051, China | | FENG Jingyu | Hunan Hydro ＆ Power Design Institute, Changsha, Hunan 410007, China | | TIAN Shiyan | College of Water and Soil Conservation, Beijing Forestry University, Beijing, 100083, China | | LEI Na | College of Water and Soil Conservation, Beijing Forestry University, Beijing, 100083, China |
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| Abstract: |
| Root barrier is one of the effective ways to reduce the bad effect of shelterbelt at present. In this experiment, different kinds of root barrier was applied on four sides of shelterbelt within farmland shelternet, aiming at blocking-up tree root which invaded into farmland and decreasing the soil moisture and nutrition competition between trees and crops. Soil volumetric water content was determined after irrigation for 10 d, 15 d and 20 d at wheat filling stage when the competition was serious between shelterbelt and whea
t, and the root barrier effect on farmland shelterbelt system was evaluated with regard to soil volumetric water content and wheat yield. The result indicated that the root barrier effect was different on four sides of shelterbelt within shelternet. The distribution order of soil volumetric water content within shelter
net after irrigation for 20 days was south, east, west and north, the soil water content was higher in root barrier zones than non root barrier zones. Root barrier increased 0.78%～2.33% soil water volumetric content and 1.05%～12.06% wheat yield within 1.0 H near the shelterbelt, and decreased the reduction of output areas from 1.0 H to 0.5 H near shelterbelt. Root barrier can only minish bad effect of shelterbelt, but cannot eliminate competition. Considering both soil moisture and wheat yield, the root barrier from the nearest shelterbelt showed the best effect. |
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