林木抗旱性与其根次生构造关系的研究  

Study of the Relation Between Antidrought Capability of Trees and Their Secondary Root Structure

作　　者：王均明[1] 孟丽[1] 孙金花[1] 郭向阳 

机构地区：[1]河南农业大学 [2]郑州市中牟林场

出　　处：《中国水土保持》1999年第6期20-22,共3页Soil and Water Conservation in China

摘　　要：按照林木一年生根系的次生构造，特别是根横切面木质部与韧皮部面积之比，导管与木质部面积之比以及导管与根径面积之比，对林木的抗旱性进行综合评价，从遗传特征上揭示各种林木抗旱性的差别。按照这３个指标对８个常见造林树种的抗旱性进行综合评价，从强到弱依次是：刺槐＞旱柳＞紫穗槐＞臭椿＞毛白杨＞白榆＞白蜡＞沙棘。The antidrought capability of trees is comprehensively evaluated according to secondary structures of oneyear root system, specifically the ratio of xylem area to phloem area of tree root cross section, the ratio of duct area to xylem area as well as the ratio of duct to root diameter area, in order to reveal the difference of drought resistance of various trees. The three mentioned index are applied in the comprehensive evaluation of drought resistance of 8 popular varieties of trees which resulted in the following sequences from the strongest to weakest antidrought capability: Black Locust, Hankow Willow, Shrubby Falseindigo, Treeofheaven Ailanthus, Chinese White Poplar,Siberian Elm, Chinese Ash,Common Seabuchthorn.

关 键 词：次生解剖构造 抗旱性 水土保持 林木 

分 类 号：S714.7[农业科学—林学]