摘要： 通过大型非称重式蒸渗仪方法和小型称重式蒸渗仪法,对太行山典型草地黄背草群落蒸散进行研究,结果得出大型非称重式蒸渗仪法整个生长季黄背草总蒸散量为730.4mm。小型蒸渗仪法整个生长季总蒸散量为753.6mm。由相关分析得出蒸散与叶面积指数呈显著相关,建立关系式为ET=31.672LAI-47.424,R=0.616。通过两种方法进行比较,调整叶面积指数后,测定黄背草的两种方法呈显著性相关,相关系数R=0.854,回归方程为ETm=0.803ETl+10.916,R=0.854。
关键词:
蒸散,
黄被草群落,
蒸渗仪
Abstract: This paper study evapotranspiration(ET)of typical grassland(Themeda japonica community)using largescalenon-weighing lysimeter and micro-lysimeter in Taihang Mountains .The results showed that the total ET was 730.4mm by large-scale non-weighing lysimeter during entire growing season .But ET of micro-lysimeter was 753.6 mm .Byanalysis between ET and leaf area index(LAI), correlation of ET and LAI is significant at the 0.05 level(2 -tailed)forThemeda japonica community ,The questions of ET and LAI was :ET =31.672LAI -47.424 , R =0.616 。Comparisonwith two measure , correlation of ET of per unit LAI among two measures is significant at the 0.05 level(2 -tailed), questionsof two measures was :ETm=0.803ETl+10.916 ,R =0.854
Key words:
Evapotranspiration,
Themeda Japonica,
Community lysimeter
中图分类号:
YANGFan, ZHANGWan-jun. Study on Evapotranspiration of Themeda japonica Community[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.7668/hbnxb.2007.S1.041.