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| Response of aboveground biomass to the standing condition factors in semi-arid region of Loess Plateau |
| Li Ping1, Zhu Qingke1, Liu Zhongqi1,2, Zhao Hui1,3, Kuang Gaoming1, Wang Jing1 |
| 1.Key Laboratory of Soil & Water Conservation and Desertification Combating of Ministry of Education, Beijing Forestry University, 100083, Beijing；2. Shenzhen Techand Ecology and Environment CO., LTD., 518040, Shenzhen；3.China Forest Exploration & Design Institute on Kunming, 650216, Kunming：China |
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Abstract Environmental problems of Loess Plateau in western China, due to its broken terrain, complex hilly-gully system and fragile environment, have been noticed by almost all of ecologists around the world. The biomass is the reaction of energy for the ecosystem, so the aboveground biomass of after 10 years restoration was measured, and its distribution rule under different standing conditions were analyzed. The results showed that the aboveground biomass under different standing conditions decreased with the order of floor of trench, ditch in shady slope, ridge in shady slope, ditch in sunny slope, ridge top and ridge in sunny slope. The aboveground biomass at ditch and ridge slopes presented converse S type along with the elevating of slopes. At ridge slope, the maximum value of aboveground biomass appeared at 20°-25°, and the minimum value at 35°-40°, while at ditch slope, the maximum value appeared at 40°-45°, and the minimum value at 30°-35°. The effects of slope aspect on the aboveground biomass was remarkable (P=0.049), and the effects of other factors were not remarkable. Therefore, it is proposed that the distribution of the aboveground biomass is affected synthetically by soil moisture, light and other factors.
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Received: 12 October 2011
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