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| Experimental study of mixed growing medium using coal wastes in North China |
(1.Guangxi T-energy Engineering Consulting Co., Ltd. ，530023, Nanning, China;
2.College of Soil and Water Conservation, Beijing Forestry University, 100083, Beijing, China;
3.Beijing Golden Five Landscape Engineering Co., Ltd., 100022, Beijing, China;
4.Beijing Capital Highway Development Group Co., Ltd., 100161, Beijing, China;
5.Beijing Forestry and Parks Department of International Cooperation, 100013, Beijing， China) |
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Abstract In order to restore gangue heap ecologically, we used the crushed coal gangue as a main component of the growing media for plants. Soil, super absorbent polymer, controlled-release compound fertilizer and bacterial manure were selected as four factors of the growing media. Each factor has three levels, and a L16(44) orthogonal matrix table was chosen for arranging the levels in each type of growing media in which Amorpha fruticosa seeds were sowed. The optimal growing medium was obtained by analyzing the emergence rate and healthy seedling index of A. fruticosa. The optimum components of the medium were: volume ratio of gangue silt to soil 2∶1, 2kg super absorbent polymer and 680g bacterial manure contained per cubic meter of gangue silt and soil mixture without addition of controlled-release compound fertilizer.
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Received: 28 December 2012
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