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林业科学 ›› 1998, Vol. 34 ›› Issue (5): 120-126.

• 研究简报 • 上一篇    下一篇

侧柏人工幼林年生长动态及其与水热关系研究初报

薄颖生,韩恩贤,罗伟祥   

  1. 陕西省林业科学研究所 杨陵 712100
  • 收稿日期:1997-01-31 出版日期:1998-09-25 发布日期:1998-09-25

A PRELIMINARY STUDY ON THE SEASONAL GROWTH DYNAMICS OF PLATYCLADUS ORIENTALIS AND ITS RELATIONSHIP WITH WATER AND THERMAL CONDITIONS

Yingsheng Bo,Enxian Han,Weixiang Luo   

  1. Shaanxi Forestry Institute of Sciences Yangling 712100
  • Received:1997-01-31 Online:1998-09-25 Published:1998-09-25

关键词: 侧柏, 人工幼林, 生长动态, 水分, 热量, 回归分析

Abstract:

The growing rate curve of young forest has one valley and two peaks and the boundary (the valley point)is in the first and second decade of July.The increments in early stage and on sunny slope are greater than that in the later stage and shady slope respectively.The young trees are more sensitive to water condition than thermal one. The reaction process needs about 10 days.The combined effect of water and heat on the growth is very strong.High temperature can limit the tree growth.The difference of growth between different or ientations of slope is due to different water and thermal conditions.The tree growth on the shady slope is better than that on the sunny slope in weibei loess plateau.

Key words: Platycladus orientalis, Young forests, Growth dynamics, Water, Heat, Regression analysis