Pedosphere 15(2): 173--, 2005
ISSN 1002-0160/CN 32-1315/P
©2005 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Fate of urea applied to peanut (Arachis hypogaea L.) on a sloping udic ferrosol in subtropical China
WANG Xing-Xiang, SUN Bo, ZHANG Tao-Lin and HE Yuan-Qiu
Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: xxwang@issas.ac.cn
ABSTRACT
      A field experiment was conducted to study the outcome of N using isotope-labeled urea with a peanut cropping system in a Udic Ferrosol on a 7% slope at the Ecological Experimental Station of Red Soil, Chinese Academy of Sciences. The micro-plots were designed in two sets with three replicates and four N treatments. An iron frame with its edge 10 cm above the ground was used to control soil erosion and runoff in set A, but in set B the upper edge of the frame was level with the ground. Randomly positioned 15N fertilized micro-plots were established along the contour. At harvest on August 13, 2002, which was four months after urea application, the peanuts had absorbed 30.6%-38.0% of the urea, transpired 13.1%-22.4% to the atmosphere, lost 6.4%-8.4% through soil erosion and surface runoff, and maintained 40.7%-48.9% in the 0-60 cm soil layer with 0.5%-5.0% below 60 cm.
Key Words:  15N labeled urea, peanut, sloping upland, soil erosion, Udic Ferrosol
Citation: Wang, X. X., Sun, B., Zhang, T. L. and He, Y. Q. 2005. Fate of urea applied to peanut (Arachis hypogaea L.) on a sloping udic ferrosol in subtropical China. Pedosphere. 15(2): 173-.
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