Effects of Mixed Trees of Farmland Shelterbelts on Transpiration Rate

CUI Jian-guo; WANG Yu; BI Guang-you; YU Dong-xing; LI Shu-sen

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Effects of Mixed Trees of Farmland Shelterbelts on Transpiration Rate

- Effects of Mixed Trees of Farmland Shelterbelts on Transpiration Rate
- Bulletin of Soiland Water Conservation Vol. 28, Issue 4, Pages: 93-97(2009)
- 作者机构：
  
  1. 北京林业大学水土保持学院,北京,100083
  2. 黑龙江省森林与环境科学研究院,黑龙江,齐齐哈尔,161005
- 作者简介：
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- Published：2009
- 稿件说明：
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CUI Jian-guo, WANG Yu, BI Guang-you, et al. Effects of Mixed Trees of Farmland Shelterbelts on Transpiration Rate[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 93-97.
DOI：

CUI Jian-guo, WANG Yu, BI Guang-you, et al. Effects of Mixed Trees of Farmland Shelterbelts on Transpiration Rate[J]. Bulletin of Soiland Water Conservation, 2009, 28(4): 93-97. DOI：

摘要

以黑龙江省西部地区主要农田防护林树种为研究对象，采用快速称重法对樟子松、落叶松和小黑杨纯林，小黑杨和樟子松混交林，小黑杨和落叶松混交林中的各树种蒸腾速率进行了比较研究。结果表明:(1)与小黑杨混交的樟子松和樟子松纯林蒸腾速率日变化差别不大，蒸腾速率的月变化差异最小，各结构防护林树种的蒸腾速率均呈现抛物线变化趋势。(2)与小黑杨混交的落叶松在整个生长季的月平均蒸腾速率为落叶松纯林的76.96%，与落叶松混交的小黑杨的蒸腾速率比小黑杨纯林低17.43%，小黑杨与落叶松混交林能够有效地降低这两个树种的蒸腾速率。(3)农田防护林在多种环境因子的综合作用下，其蒸腾速率受大气温度和太阳总辐射的影响较大，并且蒸腾速率与大气温度、太阳总辐射和土壤水含量均表现出正相关，与相对湿度和风速均表现出负相关。

Abstract

As the main tree species of farmland shelterbelts in North China，the transpiration rates of Pinus sylvestris L.var. mongolica Litv.

Larix gmelinii，Populus sdmondd XP. ndgra

and Populus alba XP. berolinensis were studied comparatively by the method of rapid weighting. Results showed that(1) the diurnal variation of transpiration rate of Pinus sylvestris L.var. mongolicaLitv. mixed with Populussimonii XP. ndgra and Pdnus sylvestrds L.var. mongoldca Litv. was of little difference，monthly variation of transpiration rate for them was the slowest，and the transpiration rates of other structures showed a parabolic trend.(2) Monthly averaged transpiration rate of Lardx gmelinii mixed with Populus sdmondd XP. ndgra accounted for 76. 96%of Larix gmelinii and the averaged transpiration rate of Populus simonii XP. nigra mixed with Larrix gmeldndd was 17.43%lower than that of Populussimonii XP. nigra. The structure mixed with Populus simonii XP. nigra and Populus simonii XP. nigra could decrease the transpiration rate of the two tree species. (3) The transpiration rate of farmland protection forest was seriously affected by atmospheric temperature and solar radiation in a variety of environmental factors in combination. The transpiration rate showed the positive correlation with atmospheric temperature，solar radiation，and soil water content，but negative correlation with relative humidity and wind speed.

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