摘要
在河西走廊临泽绿洲北部试验区，对春小麦进行３种水分处理并同时观测了全生育期内的蒸发蒸腾（ＥＴ）及环境中各生态因子和植物生理指标。结果表明：当年全生育期内，春小麦ＥＴ在充分供水条件下为５９３ｍｍ；在中等供水条件下为３６５ｍｍ；在少量供水条件下为２８０ｍｍ。其日蒸散量分别为５．５ｍｍ，３．４ｍｍ和２．８ｍｍ。讨论了影响ＥＴ和植物蒸腾的各植物生理指标和环境因子，发现在植物诸指标与蒸腾相关程度的顺序为：叶片水势、气孔导度和叶温（充分供水）及叶片水势、叶温和气孔导度（水分胁迫）。在环境诸因子中与ＥＴ的相关程度顺序是：有效光合辐射、净辐射、２０ｃｍ土温、大气饱和水汽压差、１５ｃｍ土温、气温、１０ｃｍ土温、土壤表面温度及５ｃｍ土温。
Spring wheat(Triticum aestivvm cv·“3 13 1”)was subject to three soil water regimes in the tanks of lysimeter at northern part of Linze Oasis which is located in the Hexi Corridor. The observations of evapotrans- piration(ET),transpiration of single leaf,various ecological factors and some biological parameters were conducted in both typical fine day and overcast day and during the whole life span of wheat.The results showed that the total ET of spring wheat during its life span were 593mm,365mm and 280mm for sufficient water supply,moderate water supply and insufficient water supply,respectively;and the average daily ETs for the three soil regimes were 5.5mm,3.4mm and2.8mm. The possible impacts of various biological and ecological factors on ET and wheat leaf transpiration were presented in the paper· Regression and correlation analysis demonstrated that the order of correlation coefficients of various biological factors with leaf transDiration was leaf water Dotential>leaf stomatal conductance>leaf tem- perature for sufficient water supply,and leaf water potential>leaf temperature>leaf stomatal conductance for other two soil water regimes;and the order of correlation coefficients of various ecological factors with ET is photosynthetically active radiation>net irradiance>soil temperature in 20cm depth,and air water vapor deficit>soil temperature in 15cm depth,while ambient temperature>soil temperature in 10cm,0cm and 5cm depths.
出处
《植物生态学报》
CAS
CSCD
北大核心
1994年第4期362-371,共10页
Chinese Journal of Plant Ecology
基金
国家自然科学基金委员会重大科研项目
"黑河流域地气交换特征研究"资助
关键词
小麦
春小麦
蒸发蒸腾
环境因子
植物因子
Spring wheat
Evapotranspiration
Lysimeter
Ecologicalfactors
Biological factors
