欢迎访问林业科学,今天是

林业科学 ›› 1995, Vol. 31 ›› Issue (6): 485-490.

• 论文及研究报告 • 上一篇    下一篇

不同林地清理方式对杉木人工林地力的影响*

马祥庆,何智英,俞新妥   

  1. 福建林学院 南平 353001
  • 收稿日期:1994-07-28 出版日期:1995-11-25 发布日期:1995-11-25

THE EFFECTS OF DIFFERENT CLEARANCES ON SOIL FERTILITY OF CHINESE FIR TIMBER PLANTATION

Xiangqing Ma,Zhiying He,Xintuo Yu   

  1. Fujian Forestry College Nanping 353001
  • Received:1994-07-28 Online:1995-11-25 Published:1995-11-25

摘要:

建立12个径流场对不同林地清理方式林地肥力变化进行了6年的定位研究。结果表明: 采伐迹地的不同清理方式导致了林地肥力的较大差异。炼山清理迹地具有短期的激肥效应, 经雨水冲刷, 林地肥力急剧下降, 至杉木幼林郁闭, 肥力趋于稳定。其林地肥力变化可分为激肥效应期、肥力下降期和肥力稳定期, 在同一林地上周期性炼山是导致连栽地力衰退的重要原因。不炼山林地6年的肥力变化可分为采伐剩余物分解初期、分解高峰期和分解末期, 经采伐剩余物分解, 其林地养分得到富集, 肥力得到维持。

关键词: 林地清理方式, 炼山, 杉木, 土壤肥力

Abstract:

The dynamic changes of soil fertility of different ground clearances are studied through the fixed position observation of twelve run-off plots for six years. The results show that the great differences between the soil fertility of control burning and that of non-burning are resulted by the different ground clearances. The soil fertility was increased by control burning shortly and decreased rapidly because of the erosion till the stand closed. According to the dymamic changes of soil fertility in control burning site, three soil fertility periods are designiated. Control burning periodically in same land is main factor that causes soil degradation of Chinese fir timber plantation. Where as the nutrient were enriched in surface layer of non-burning land and soil fertility was improved due to the decomposition of site slash.The changes of soil fertility of non-burning land in six years also can be devided into three periods but quite different from that of the control burning.

Key words: Ground clearance, Control burning, Chinese fir, Soil fertility