绵毛优若藜在我国干旱区的适应性  

Ecological Adaptation of Ceratoides Lanata in Arid Region of China

作　　者：刘虎俊[1] 王继和[1] 张国良 李德禄[1] 李爱德[1] 安富博[1] 乌云塔娜[3] 

机构地区：[1]甘肃省荒漠化防治重点实验室,甘肃省治沙研究所,甘肃武威733000 [2]蓄集峡水利枢纽工程筹建处,青海德令哈817000 [3]中南林学院,长沙410004

出　　处：《牧草与饲料》2007年第2期39-42,共4页Journal of Forage & Feed

基　　金：国家“948”项目[2001-50（1）]

摘　　要：绵毛优若藜是北美洲的特有种，被引种到我国的干旱区后，其生物学特性和生态适应性都有所变化。在引种地，绵毛优若藜的物候期较原产地推迟，夏秋季所生的簇生叶保持绿色，表现为准常绿灌木。绵毛优若藜的年生长呈单峰型，其高生长和径向生长的高峰期均在7-8月。绵毛优若藜的生态幅较宽，在气温10-30℃之间，种子都可发芽。绵毛优若藜耐土壤贫瘠、耐沙埋，喜欢偏碱性土壤，在养分条件较差的沙丘和pH值为7．0-9．0的沙壤土上均能生长，在透气性较好的沙土上生长量较粘土大。当沙土的土壤含水率为1．69％。3．30％，粘土的土壤含水率为9．04％。16．14％时，绵毛优若藜萎蔫。TheCeratoides Lanata（Pursh） Howellis a unique evergreen shrub in North America, and was introduced the arid region of China, then its biological property and adaptation shown change at a few parts in introduced places. The phenological time of Ceratoides lanata was latter than that of in resource place. The fasciation leaves, that were born in summer and autumn, kept evergreen, and the shrub was a sub-evergreen. The yearly growth of Ceratoides lanata shown a single peak during growing season, and the time of fastigium of high and diameter of stem is in July and August. The ecological amplitude of Ceratoides lanata is large. When the temperature was 10 - 30℃, the breedling of Ceratoides lanata could be done. Ceratoides lanata can tolerate poverty of soil and buried by sand, and likes to grow on partial alkali soil; it could grow well in sand dune with poverty nutrition and sand-loam soil with pH of 7.0 - 9.0, in addition the growth amount was much bigger on sandy soil than that of on clay soil. Ceratoides lanata withers at 1.69% - 3.30% of soil moisture on sandy soil and 9.04% - 16.14% of clay soil.

关 键 词：干旱区 绵毛优若藜 生物学表现 适应性 

分 类 号：Q948.118[生物学—植物学]