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Written Paper

Influence of stand density on water-holding characteristics of litter layer  [2012]

He Yu, Beijing Forestry University, Beijing (China), School of Soil and Water Conservation Ding Guodong, Beijing Forestry University, Beijing (China), School of Soil and Water Conservation Liang Wenjun, Beijing Forestry University, Beijing (China), School of Soil and Water Conservation

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This paper is to discuss the influence of stand density on litter water-holding characteristics. Take Pine plantations of different stand densities ((650(40a), 1 400(35a),1 850(38a)/hm2)) in Yanshan Mountain as the research object, we set standard plots, measured the depth and accumulation volume of the litter and brought these litters back, and used indoor immersion method to measure litter water-holding characteristics under different stand densities. Litter’s accumulation volume of these pine plantations is 26.62-49.79 t/hm2. If stand age is not the case, litter accumulation and stand density will show a positive correlation in density of 650, 1 400, 1 850 plant/hm2. The natural moisture content of Pinus tabulaeformis forest plantation in this study is around 50% and it does not change significantly with stand density, while saturated water-holding rate does not show any obvious regularity with stand density. Water-holding capacity of litter and soaking time have logarithmic relationship, while the relationship of water absorption rate and soaking time is power function. Litter’s ability to intercept and accumulate rainfall is positively associated with stand density. For those Pinus tabulae formis forest plantation with similar age and standing conditions, both accumulation volume of litter and its capacity of intercepting rainfall will be much greater as stand density increases.

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Journal of Northwest Agriculture and Forestry University

ISSN : 1671-9387

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