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| Temporal changes in aboveground dead material under different grazing conditions in a snow pasture in central Japan |
| YI Ru-han1, Masae Shiyomi2, Shigeo Takahashi3, Tadakatsu Okubo4 |
| 1. Environmental Engineering Department, College of Science and Engineering, Jinan University, Guangzhou 510632 China; 2. Science Department, Ibaraki University, Mito 310-0851, Japan; 3. National Institute of Livestock and Grassland Science, Nasu, 329-2747, Japan; 4. Nasu University, Kuroiso 329-3121, Japan. |
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Abstract In order to understand the relation between primary production, energy flow and carbon recycle in grassland ecosystem, climatic factors and artificial disturbance, a grazing experiment with different grazing management treatments(different grazing intensities and nitrogen applications) was carried out in a snow pasture of the National Grassland Research Institute located in Nishinasuno, the central area of Japan from 1974 to 1994. As a part of these studies, the aim of present study was to assess the temporal changes in aboveground dead material(standing dead and litter) over a 21-year period since 1974. The result showed that the amount of aboveground dead material varied greatly seasonally and yearly, and also tended to have a high positive correlation with the aboveground biomass. The result of an analysis of variance(ANOVA) showed aboveground dead material was influenced strongly by grazing intensity, year, month(p<0.01), the temporal changes of aboveground dead material were independent of the nitrogen application levels.
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Received: 25 August 2004
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