摘要
应用热脉冲技术对河套灌区农田防护林小美旱杨 ( Populus popular s)树干液流速度进行了研究。结果表明 ,在正常生长状态下 ,小美旱杨树干单位面积液流通量为 0 .0 88L·cm- 2· d- 1;形成层以下不同深度的树液流速具有相同的日变化趋势 ,在中午前后各深度流速值均达到最大 ,各深度流速差值亦达到最大。最大液流速度相对位点距形成层相对距离 1 0mm处 ;在不同水分条件下 ,灌水时液流速度小于未灌水时液流速度 ;萌生苗液流速度大于扦插苗液流速度。
In the paper,the heat pulse technique was applied to study the stem sap flow of Populus populars in May and June of 1998.The results show that,in the natural conditions,the intensity of sap flow of Populus populars was 0.088 L·cm -2 ·d -1 .The velocity of sap flow at different depths below the cambium showed the same temporal changes of Populus populars .At noon it reached the maximum,and its difference did so.In the different soil moisture content conditions,the velocity of sap flow of Populus populars was higher at irrigated then non irrigated.The velocity of sap flow of sprouted seedling was higher then cuttaged seedling.
出处
《西北植物学报》
CAS
CSCD
2001年第4期644-649,共6页
Acta Botanica Boreali-Occidentalia Sinica
基金
内蒙古自治区科委"九五"攻关资助项目
关键词
热脉冲技术
树干液流
小美旱杨
heat pulse technique
stem sap flow
Populus populars
