摘要
本文主要根据1989年的(?)观测资料,对河北林场的水分生态问题作了初步研究,结果表明,在年生长期中,河北杨的蒸腾强度日变化与气温日变化的关系很密切,但是蒸腾强度日变化与相对湿度日变化,蒸腾强度季节变化与气温季节变化或土壤水分季节变化的相关关系均不明显。此研究为进一步客观认识与合理规划经营人工林提供科学依据。
The research results show that the transpiration instensity of populus hopeiensis was 0.0896±0.0586g/gf'h. The correlation between daily changes in the transpiration intensity and the air temperature was quite significant, but the correlation between the seasonal changes of the former and the latter, and the correlation between the seasonal changes of the former and the relative humidity or the soil water were not significant. The water consumption of the community evapotranspiration was equal to the precipitation roughly during the growing season. The water consumption through tree transpiration accounted for 18.4% of the water consumption by the forest evapotranspiration and 18.5% of the precipitation during the same period. Judged by water cycle, the level of water cycle in soil was quite lower, and great amount of water deficit in soil arose in a dry year of the forest.
出处
《生态学报》
CAS
CSCD
北大核心
1991年第4期313-317,共5页
Acta Ecologica Sinica
关键词
河北杨
杨
水分生态
populus hopeiensis, water ecology, transpiration intensity, soil water equilibrium.
