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环境科学与资源利用论文_冀西北坝上地区不同植
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摘要:文章目录 1 Introduction 2 Study area 3 The data sources and research methods 3.1 The data sources 3.2 Calculation of ecological water requirements of the vegetation types 3.2.1 Calculation of vegetation evapotranspiration 3.2.2 Calculat
文章目录
1 Introduction
2 Study area
3 The data sources and research methods
3.1 The data sources
3.2 Calculation of ecological water requirements of the vegetation types
3.2.1 Calculation of vegetation evapotranspiration
3.2.2 Calculation of potential evapotranspiration
3.2.3 Determination of vegetation coefficients (Kc)
3.2.4 Determination of soil amendment coefficient
3.2.5 Determination of vegetation ecological water shortage
4 Results and analysis
4.1 Actual evapotranspiration values of different vegetation types
4.2 Actual evapotranspiration water shortage of different vegetation types
4.3 Minimum and optimal ecological water demand quotas of different vegetation types
4.4 Minimum and optimal ecological water shortage values of different vegetation types
5 Discussion
6 Conclusions
文章摘要:为了了解冀西北坝上地区不同植被的生态需水量,为该地区的植被建设提供科学依据,采用实际观测数据及Irmak-Allen公式对张北坝上地区乔木林、灌丛和草地的生态需水量、生态缺水量进行了研究。研究结果表明,冀西北坝上地区3种植被生长季的实际蒸散量由高到低为乔木林、灌丛和草地,分别为401.81 mm、358.78 mm和346.02 mm。生长季乔木林、灌丛和草地的最小生态需水量分别为243.96mm、218.35mm和211.36mm,适宜生态需水量分别为472.99mm、423.34mm和409.77 mm,适宜生态缺水量分别为198.56 mm、148.91 mm和135.34 mm。植被生态缺水量具有明显的季节性,5、6月份缺水量最大,7–10月份较低,甚至还有盈余,5、6月份进行人为补水将有助于缓解植被的干旱胁迫。冀西北坝上地区的降雨量能够满足乔木林最小生态需水量的要求,但与适宜生态需水量差距较大,不足以使乔木林维持良好的生长状态,这是导致坝上地区杨树防护林退化的主要原因。
文章关键词:
论文分类号:X143;TV213.4
文章来源:《西北园艺》 网址: http://www.xbyyzz.cn/qikandaodu/2022/0112/1257.html