自然资源学报 ›› 1997, Vol. 12 ›› Issue (4): 343-348.doi: 10.11849/zrzyxb.1997.04.008

• 论文 • 上一篇    下一篇

皆伐炼山对林地养分元素资源迁移影响的研究

张鼎华   

  1. 福建省林业科学研究院, 福州 350012
  • 收稿日期:1997-01-06 修回日期:1997-03-31 出版日期:1997-12-25 发布日期:1997-12-25
  • 作者简介:张鼎华,男,1958年9月生,造林学硕士,现在福建农业大学攻读在职博士。研究方向:森林生态学、林 木栽培学,长期从事林地地力衰退和维护研究,在《林业科学》、《生态学报》等刊物发表论文近30篇。
  • 基金资助:

    福建省教委科研基金;福建省自然科学基金

A STUDY OF THE EFFECT OF CLEAR CUTTING AND PRESCRIBED BURNING ON THE MIGRATION OF THE NUTRIENT ELEMENTRESOURCES OF THE FOREST LAND

Zhang Dinghua   

  1. Fujian Forestry Science Institute, Fuzhou 350012
  • Received:1997-01-06 Revised:1997-03-31 Online:1997-12-25 Published:1997-12-25

摘要: 本文研究了林地皆伐火烧后生物量和养分元素资源迁移状况。结果表明:皆伐后移出林地生物量占林分地上部分总生物量80%以上,移出林地养分元素Ca、Mg占林地地上部分Ca、Mg60%以上,N、P、K则低于50%;采伐剩余物在火烧过程中N损失率高达95%,P、K、Ca、Mg损失相对较少;火烧后表层土壤N、P有一定损失,Ca、K、Mg则有所增加。皆伐火烧基本上将整个林分生长期所积累起来的地上部分生物量和养分元素全部迁移出林地。

关键词: 林地, 生物量, 养分元素资源, 皆伐, 炼山

Abstract: his paper studies the migration of nutrient element resources of the forest land after clear cutting and prescribed burning. The results are as follows: the biomass that migrates out of the forest land after clear cutting is above 80% of the total biomass of the forest land, the migration of Ca and Mg is above 60%, and the migration of N,P and K is below 50%. The nitrogen loss rate of clearing residue during burning is above 95%, and the loss rates of P,K,Ca and Mg are relatively lower. N and P reserves decrease and Ca,K and Mg increase slightly in the surface soil layer after prescribed burning. Almost all the biomass and nutrient elements of the forest land which accumulate during the whole growth stage of the forest stand are migrated out of the forest land after clear cutting and prescribed burning.

Key words: orest land, biomass, nutrient element resources, clear cutting, prescribed burning