| 金沙江干热河谷植被恢复树种盆栽苗蒸腾耗水特性的研究 |
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| 引用本文： | 段爱国,张建国,张俊佩,王军辉,李昆,张守攻. 金沙江干热河谷植被恢复树种盆栽苗蒸腾耗水特性的研究[J]. 林业科学研究, 2009, 22(1) |
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| 作者姓名： | 段爱国 张建国 张俊佩 王军辉 李昆 张守攻 |
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| 作者单位： | 中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京,100091;中国林业科学研究院资源昆虫研究所,云南昆明,650224 |
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| 基金项目： | 国家林业局林业重点工程科技支撑项目 |
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| 摘 要： | 采用快速称重法对金沙江干热河谷28种植被恢复树种盆栽苗蒸腾耗水规律进行了研究,结果表明:(1)在干热的3月份,在土壤水分充足的条件下,25个供试树种盆栽苗在典型晴天里全天蒸腾耗水量为171.80～731.00 g,白天蒸腾耗水量为147.10～631.70 g,白天蒸腾耗水量占全天耗水量的78.83%～91.16%,其中,24个树种的盆栽苗白天平均蒸腾耗水速率为0.95～6.91 mmol·m-2·s-1,表明不同盆栽苗的耗水能力存在明显差异.(2)在湿季10月份,14个供试阔叶树盆栽苗全天的蒸腾耗水量为204.06～303.28 g,白天平均耗水速率为0.82～2.12mmol·m-2·s-1.(3)所有供试盆栽苗在干热季节里的蒸腾耗水速率均大于湿季,干热天气加剧了参试盆栽苗的蒸腾作用,加大了蒸腾失水的速度.(4)干热胁迫推迟了大部分树种盆栽苗蒸腾耗水量日变化峰值出现的时间,对绝大多数参试盆栽苗而言,干热胁迫降低了蒸腾量的日变化幅度.(5)充分供水条件下,盆栽苗木蒸腾耗水量及耗水速率日变化的单峰分布特征不受季节变化所引起的大气干旱胁迫程度的影响,随着土壤干旱胁迫加深,苗木蒸腾耗水量的日变化峰值有所提前,单峰态类型有向多峰态类型过渡的趋势.
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| 关 键 词： | 金沙江干热河谷 植被恢复 蒸腾耗水 日变化 季节效应 |
Studies on Transpiration of Seedlings of the Tree Species for Vegetation Restoration in the Dry-hot Valleys of the Jinsha River |
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| DUAN Ai-guo,ZHANG Jian-guo,ZHANG Jun-pei,WANG Jun-hui,LI Kun,ZHANG Shou-gong. Studies on Transpiration of Seedlings of the Tree Species for Vegetation Restoration in the Dry-hot Valleys of the Jinsha River[J]. Forest Research, 2009, 22(1) |
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| Authors: | DUAN Ai-guo ZHANG Jian-guo ZHANG Jun-pei WANG Jun-hui LI Kun ZHANG Shou-gong |
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| Affiliation: | 1.Research Institute of Forestry;CAF;Key Laboratory of Tree Breeding and Cultivation;State Forestry Administration;Beijing 100091;China;2.Research Institute of Resource Insects;Kunming 650224;Yunnan;China |
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| Abstract: | Transpiration of twenty-eight potted afforestation species for vegetation restoration in the dry-hot valleys of the Jinsha River was studied on typical sunny day in different seasons.Five main conclusions were gotten as follows:(1) In dry and hot March,the variation range of water consumption through transpiration in whole day of twenty-five species was 171.80-731.00 g,in which,the water consumption in the day was 147.10-631.70 g,the proportion of water consumption in the day time arrived 78.83%-91.16%;exce... |
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| Keywords: | the dry-hot valleys of the Jinsha River vegetation restoration water consumption by transpiration daily change season effect |
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