摘要
试验研究冬小麦田间蒸散和棵间蒸发变化规律及其影响因子结果表明 ,播种～返青期冬小麦棵间蒸发占蒸散比例 (E ET)最大 ,抽穗～灌浆期最小。整个生长期间棵间蒸发占蒸散量 31 .4 % ,棵间蒸发占蒸散比例 (E ET)与冬小麦叶面积指数 (LAI)有一定关系 ,E ET =0 .36 93× (LAI) - 0 .74 93(R2 =0 .82 36 )。
The changing laws and affecting factors of the diurnal evapotranspiration and aoil evaporation between plants in the winter wheat field are studied in this paper. The results show that the ratio of evaporation to evapotranspiration is the most from seeding to recovering and it is the least from tasseling to grain filling; the ratio of evaporation to evapotranspiration in the winter wheat field is about 31.4% during the whole periods; the equation of the relationship between the ratio of evaporation to evapotranspiration ( E/ET ) and LAI is E/ET=0.3693×(LAI) -0.7493 (R 2=0.8236) .
出处
《中国生态农业学报》
CAS
CSCD
2004年第3期62-64,共3页
Chinese Journal of Eco-Agriculture
基金
中国科学院知识创新工程重要方向性项目 (KZCX SW 3 17 0 2 )
国家高技术发展 ( 863 )计划项目 ( 2 0 0 2AA2Z42 3 1)
"河北平原典型地区农业节水示范与地下水资源可持续利用"项目 ( 0 12 2 0 70 3D)共同资助
