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杨文斌,任建民,贾翠萍.柠条抗旱的生理生态与土壤水分关系的研究.生态学报,1997,17(3):239~244 本文二维码信息
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柠条抗旱的生理生态与土壤水分关系的研究
STUDIED ON THE RELATIONSHIP BETWEEN PHYSIOLOGICAL ECOLOGY OF DROUGHT-RESISTANCE IN CARAGANA KORSHINSKII AND SOIL WATER
投稿时间:1995-05-27  修订日期:1996-01-27
DOI:
关键词清晨叶水势  土壤水势  膨压  
Key Wordswater potential of leave in early morning  water potential of soil  turgor potential  
基金项目
作者单位
杨文斌 内蒙古林业科学研究院 
任建民 内蒙古林业科学研究院 
贾翠萍 内蒙古林业科学研究院 
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摘要:
采用LI-1600气孔计和压力室测试了风沙土上生长的柠条的SPAC系统的水分关系和P-V水分特征曲线,结果表明:当沙土含水率(W)的水分特征曲线的回归方程为:ψs=-40.32196×0.427905W,沙土平均含水率大于45%,柠条固沙林生长正常,叶水势高。沙土含水率小于4.5%时,柠条生长速度显著下降,柠条清晨叶水势(ψm)与沙土含水率(W)的回归方程为:ψm=-0.35926·e6.31144/W,风沙土上生长的柠条的“经济水阈”大约在4.5%左右,“生命水阈”大约在3.5%左右。
Abstract:
The paper has investigeted the physio-ecologicl water relationship of the SPACsystem and water parameters of P-V curver of Caragana korshiskii growing in aeolian sandysoil. When the relationship between water content(W) and water potential(ψs) in the aeoliansandy soil is: ψs=- 40. 32196 ×0.42795w, W= 4. 5 %, is just the poit that convert the slowlyfall into the fast one. When W>4. 5 % , C. korshinskii grows very well. And when W is bellowto 4. 5%, the growth has been affected by W. The leave water potential...
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