摘要
以陕北黄土丘陵沟壑区的盛果期山地苹果为研究对象,2008—2010年连续3年监测其树冠外大气降水、树冠穿透降水和树干径流,分析不同降水因子对树冠截留能力的影响.结果表明:研究区苹果树干径流率为0.8%,树冠截留率为8.9%,且株间的截留量高于行间,距树干越近,截留量越高.苹果树冠在雨季截留量较大而截留率较低,旱季截留量较小但截留率较高.苹果树冠截留量随降水量、降水强度、降水历时、降水间隔的增大而增加,为幂函数或对数函数关系;截留率随降水量、降水强度、降水历时的延长而降低,随降水间隔的延长而增加,呈幂函数关系.不同降水因素中,降水量对苹果树冠截留能力的影响最大.
Taking the apple trees at their full-fruit stage in the loess hilly and gully region of Shaanxi as test objects,a three-year consecutive monitoring was conducted on the precipitation outside the tree crown,the through fall of the crown,and the stem flow from 2008 to 2010,with the effects of different precipitation factors on the crown interception analyzed.In the study region,the stem flow rate and crown interception rate of the trees accounted for 0.8% and 8.9% of the precipitation,respectively,the inter-plant interception was higher than the inter-row interception,and the interception increased with the decreasing distance to the stem.In rainy season,the crown interception was greater while the interception rate was smaller;in drought season,it was in adverse.The crown interception increased with increasing precipitation amount,precipitation intensity,precipitation duration,and precipitation interval,and the relationships followed power function or logarithmic function.The interception rate was negatively correlated with precipitation amount,precipitation intensity,and precipitation duration,but positively correlated with precipitation interval,and the relationships were in power function.Among the precipitation factors,precipitation amount had the greatest effects on the crown interception capability of the apple trees.
出处
《应用生态学报》
CAS
CSCD
北大核心
2013年第2期379-387,共9页
Chinese Journal of Applied Ecology
基金
国家"十二五"科技支撑计划项目(2011BAD31B05)资助
关键词
苹果树冠
降水因子
截留能力
apple tree crown
precipitation factor
interception capability.
