Impact of Continuous Chinese Fir Monoculture on Soil

编号 zgly0000329402

文献类型 期刊论文

文献题名 Impact of Continuous Chinese Fir Monoculture on Soil

学科分类 220.1040;森林土壤学

作者 YANGYu-Sheng  LIUChun-Jiang:  W.KUTSCH  CHENGuang-Shuit  YUXin-Tuo 

作者单位 CollegeofGeographyScience 

母体文献 Pedosphere;土壤圈: 英文版 

年卷期 2004,14(1)

页码 117-124

年份 2004 

分类号 S152.4  S791.27 

关键词 土壤结构  土壤营养  单一栽培  冷杉  计算机控制  福建 

文摘内容 Soil properties were investigated in sites where three succeeding generations of Chinese fir (Cunninghamia lanceolata (Lambert) Hooker) in Nanping, Fujian, China, were cultivated in order to show the impact of a repeated monoculture on site productivity. Compared with the first generation (FG) stand the soil structure deteriorated in the second generation (SG) and the third generation (TG) stands. For instance, the destruction rate of the peds increased by 55%-115% in the SG and the TG stands compared to the FG stand. Soil nutrient storage and nutrient availability also decreased in the SG and the TG stands. For surface soils of 0-20 cm, the organic matter content, total N and P, and available N and P decreased by 3%-20% relative to those in the FG stand. For many soil parameters, the differences between the FG stand and the SG and the TG stands were statistically significant (LSD test, P<0.05). Furthermore, with each succeeding generation of Chinese fir, the total number of soil microbes declined, the soil enzyme activity weakened, and the soil biological activity decreased. In order to maintain sustainable site productivity, new silvicultural practices need to be developed for management of Chinese fir plantations。