应用生态学报2012，Vol.23Issue(12)：3301-3308,8.
三峡库区马尾松人工林凋落物和根系输入对土壤理化性质的影响
Effects of litterfall and root input on soil physical and chemical properties in Pinus massoniana plantations in Three Gorges Reservoir Area, China
摘要
Abstract
An investigation was made on the soil physical and chemical properties in different-aged Pinus massoniana plantations in Three Gorges Reservoir Area under effects of litterfall and roots. The annual litter production in mature stand was 19.4% and 65.7% higher than that in nearly mature and middle-aged stands, respectively. The litter standing amount was in the sequence of mature stand > middle-aged stand > nearly mature stand, while the litter turnover coefficient was in the order of nearly mature stand (0. 51) > mature stand (0.40) > middle-aged stand (0. 36). The total root biomass, live root biomass, and dead root biomass were the highest in middle-aged stand, and the lowest in nearly mature stand. In middle-aged stand, soil total porosity was the highest, and soil bulk density was the lowest. Soil organic matter and total nitrogen contents were in the order of mature stand > middle-aged stand > nearly mature stand, soil nitrate nitrogen occupied a larger proportion of soil mineral N in nearly mature stand, while ammonium nitrogen accounted more in middle-aged and mature stands. In nearly mature stand, litter production was moderate but turnover coefficient was the highest, and soil nutrient contents were the lowest. In middle-aged stand, root biomass and soil total porosity were the highest, and soil bulk density were the lowest. In mature stand, root biomass was lower while soil nutrient contents were the highest. The increase of root biomass could improve soil physical properties.关键词
三峡库区/马尾松人工林/根系/凋落物/土壤理化性质Key words
Three Gorges Reservoir Area/ Pinus massoniana plantation/ root/ litterfall/ soil physical and chemical properties分类
农业科技引用本文复制引用
葛晓改,黄志霖,程瑞梅,曾立雄,肖文发,谭本旺..三峡库区马尾松人工林凋落物和根系输入对土壤理化性质的影响[J].应用生态学报,2012,23(12):3301-3308,8.基金项目
"十二五"国家科技支撑计划项目(2011BAD38B04)和林业公益性行业科研专项(201104008)资助. （2011BAD38B04）
