Fate of Urea Applied to Peanut (Arachis hypogaea L.) on a Sloping Udic Ferrosol in Subtropical China  

作　　者：WANGXing-Xiang SUNBo ZHANGTao-Lin HEYuan-Qiu 

机构地区：[1]InstituteofSoilScience,ChineseAcademyofSciences,Nanjing210008（China）

出　　处：《Pedosphere》2005年第2期173-180,共8页土壤圈（英文版）

基　　金：Project supported by the Key Project of Knowledge Innovation System of Chinese Academy of Sciences (No. KZCX3-SW-417) the National Key Basic Research Support Foundation of China (No. G1999011801).

摘　　要：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 15…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.

关 键 词：N-15 labeled urea PEANUT sloping upland soil erosion Udic Ferrosol 

分 类 号：S157.1[农业科学—土壤学] S565.2[农业科学—农业基础科学]