Pedosphere 4(1): 79--86, 1994
ISSN 1002-0160/CN 32-1315/P
©1994 Soil Science Society of China
Published by Elsevier B.V. and Science Press
N Transformation of Green Manure Incorporated Directly of Returned into Soil After Feeding Pig and Its Efficiency
HEDIAN-YUAN LIAOXIAN-LIN 等
[1]ChangshaInstituteofAgriculturalModernization,AcademiaSinica,Changaho410125,China [2]ChangshaInstituteofA,AcademiaSinica,Changaho410125,China
ABSTRACT
      15N-labelled green manure was used to feed pigs.Its nitrogen recovery by pig body,feces and uring was 23.5%,23.8%and 28.8% respectively,totalling 76.1%.Feces and green manure coordinated respectively with equal amount of CO(NH2)2-N as well as urine alone were applied as basic fertilizer in microplot experiments,The 15N recovery from feces and urine was equivalent to 2.51%and 4.82%by rice grain,and 0.98% and 1.94% by straw respectively,and soil residual ^15N from them took 13.3% and 4.90% of the ^15N in green manure,After feeding pigs with green manure and returning their feces and uringe into soil,the ^15N recovery by pig body and rice grain was 30.8%,and that by pig body,and rice plant as well as soil residual took 52.7% of the 15N in feed.^15N loss was 23.9% in pig feeding and 23.4% in rice planting.When green manure was incorporated directly into soil,its 15N recovery by grain was 26.65%,that by rice plant plus soil residual was 65.2%,and the loss was 34.8%.
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Citation: . 1994. N Transformation of Green Manure Incorporated Directly of Returned into Soil After Feeding Pig and Its Efficiency. Pedosphere. 4(1): 79-86.
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