XI WORLD FORESTRY CONGRESS Antalya, Turkey, 13 to 22 October 1997
	VOLUME 3, TOPIC 12 SUMMARIES OF VOLUNTARY PAPERS STUDIES ON SOIL DEGRADATION OF POPLAR PLANTATIONS AND TECHNIQUES TO SUSTAIN AND INCREASE THEIR SOIL FERTILITY IN CHINA Sun Cuiling1, Zhu Zhanxue2 and Guo Yuwen3 The effects of single species poplar plantations over one and two rotations and poplar grown in mixed plantations of Poplar with Black Locust (Robinia psudoacacia L.), Sea-buckthorn (Hippophae rhamnoides L.) and Indigobush amorpha (Amorpha frutixosa L.) on soil nutrients, soil microbes and the activities of soil enzymes were studied with data from 48 sample plots in Shandong, Liaoning, Henan and Hebei Provinces and Beijing. The results showed that (1) the soil nutrients of soils under single species plantations tended to be reduced. (2) the soil nutrients and the growth of the second crop forest were evidently reduced compared with those of the first crop forest. (3) the mixed Poplar forest could increase the soil fertility, and is an effective way to prevent soil degradation. Keywords: Poplar, soil degradation, mixed forest. 1 Professor, Ecological and Environmental Research Institute of Forestry, CAF, Beijing, China 100091 2 Doctor, Dept. Of Forest Resources University of New Brunswick, P.O. Box 44555, Fredericton NB, Canada 3 Engineer, Ecological and Enviornmental Research Institute of Forestry, CAF, Beijing, China 100091 Previous Section Next Section   Download the Pdf file for this topic (332 K) What is a Pdf file ?   Back to Top of the page
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