Pedosphere 4(2): 165--172, 1994
ISSN 1002-0160/CN 32-1315/P
©1994 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Biological Characteristies of Methane Emission of Oryza sativa,Panicum crus-galli and Cyperus difformis Grown on Paddy Soil |
| MIN HANG1, CHEN MEI-CI1, QIAN ZHE-SU1 |
| Deparbeent of Environmental Science, Zhejiang Agricultural University, Hangzhou 310029 (China) |
| ABSTRACT |
| Biological characteristics of methane emission were compared among Oryza saliva, Panicum crus-galli and Cyperus di加rmis grown on paddy soil. The order of the amounts of methane emitted was P. crus-galli>0. saliva>C. difjormis, with the former two 11 and 8 times as much as that of the latter, respectively. And it was just opposite to that of the methane-forn>ing activities of roots of the three plants. The diurnal changes of methane emission of the three plants were relatively consistent with valleys during 11:00-14:00 and midnight and peaks during 8:00-11:00, 14:00-20:00 and about 5:00 early morning. The methanogenic activites in rhizospheric soils were higher than those in nonrhizospheric soils with P. crus-galli and O. saliva, but not with C. diffbrmis. The pathways of methane release of P. crusyalli and 0. saliva were probably through the top gaps near the junctions of nodal plate and leaf sheath; however in C. di fformis top Raps from which methane could escape into atmosphere were not found. |
| Key Words: |
| Citation: Min, H., Chen, M. C. and Qian, Z. S. 1994. Biological Characteristies of Methane Emission of Oryza sativa,Panicum crus-galli and Cyperus difformis Grown on Paddy Soil. Pedosphere. 4(2): 165-172. |
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