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林业科学 ›› 1998, Vol. 34 ›› Issue (4): 14-21.

• 论文及研究报告 • 上一篇    下一篇

集水造林防止人工林植被土壤干化的初步研究*

王克勤,王斌瑞   

  1. 1. 西南林学院 昆明 650224
    2. 北京林业大学 北京 100083
  • 收稿日期:1996-06-10 出版日期:1998-07-25 发布日期:1998-07-25

THE INITIAL STUDIES ON AFFORESTATION BY WATER-HARVESTING TO PREVENT SOIL DESICCATION OF ARTIFICIAL PLANTATION

Keqin Wang,Binrui Wang   

  1. 1. Southwest Forestry College Kunming 650224
    2. Beijing Forestry University Beijing 100083
  • Received:1996-06-10 Online:1998-07-25 Published:1998-07-25

摘要:

本文对采用集水造林措施的两种密度人工刺槐林的产流、土壤水分变化、水量平衡以及林木生长情况与常规造林进行了对比分析,结果表明集水造林能增加植树带径流收获量,提高土壤含水量,使更多的降水渗入到根际区以下的深层土壤,防止了土壤水分长时间持续严重亏缺——土壤干化的发生,以及所导致的林木生长不良等问题。其中,以密度较小的8m2拍光处理的效果最佳,生长季汇集径流量的20%以上将贮留于土壤中,有效地补充了深层土壤水分,促进了林木生长。

关键词: 集水造林, 植树带, 根际区, 深层土壤, 土壤干化

Abstract:

This paper deals comparatively with the runoff-producing, soil-water content, water balance and trees growth of two spacing (9m×2m and 5m×2m) artificial Locust Forest between water-harvesting and conventional treatment. The results showed that afforestation by water-harvesting can increase runoff harvest in the planting strip, raise soil water content, permeate more rain-water into deep soil under the roots range and prevent critical deficit of soil water continuously for a long time——soil desiccation, which results in declination of trees growth. In these treatments, the lowest density (8m2 tamped) is desirable for effect, it is that more than 35% annual runoff yield is stored in soil, deep soil water is replenished effectively and growth of forest tress is promoted.

Key words: Afforestation by water-harvesting, Planting strip, Roots range, Deep soil, Soil desiccaion