Pedosphere 14(2): 171--176, 2004
ISSN 1002-0160/CN 32-1315/P
©2004 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Effect of continuous vegetable cultivation on phosphorus levels of fluvo-aquic soils
WANG Xin-Min and HOU Yan-Lin
Department of Soil Environmental Science, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 (China). E-mail: kirk123@163.com
ABSTRACT
      Soil P status, inorganic P fractions, and P sorption properties were studied using sandy fluvo-aquic horticultural soils, which are high in organic matter content for vegetable production in comparison with a soil used for grain crop production in Zhengzhou, Henan Province, China. P fractions, Olsen-P, and OM were determined at different depths in the soil profile and sorption isotherm experiments were performed. Most P in excess of plant requirements accumulated in the topsoil and decreased with soil depth. Total P, inorganic P, and OM concentrations increased with continued horticultural use. Olsen-P concentrations in the 0-20 cm depth of horticultural soils were 9 to 25 times higher than those of the grain crop soil. A linear transformation of the Langmuir equation showed that the P adsorption maximum (491.3 mg P kg-1) and the maximum phosphate buffering capacity (162.1 L kg-1) for 80-100 cm were greater in the grain crop soil than the horticultural soils. Thus, the most immediate concern with excess P were in areas where heavy P fertilizer was used for vegetable crops and where soil P sorption capacities were low due to sandy soils and high organic matter content.
Key Words:  fractions, horticultural soils, phosphorus status, sorption
Citation: Wang, X. M. and Hou, Y. L. 2004. Effect of continuous vegetable cultivation on phosphorus levels of fluvo-aquic soils. Pedosphere. 14(2): 171-176.
View Full Text



Copyright © 2024 Editorial Committee of PEDOSPHERE. All rights reserved.
Address: P. O. Box 821, 71 East Beijing Road, Nanjing 210008, China    E-mail: pedosphere@issas.ac.cn
Technical support: Beijing E-Tiller Co.,Ltd.