摘要
通过盆栽试验,测定了不同水分条件下21种苗木的根系活力状况,结果表明:各种苗木可以在一定的土壤干旱范围内适应环境变化.但当土壤含水量低于一定的临界值后,苗木根系将逐步丧失其活力和功能,最终地上部分死亡.苗木的根系活力不仅与土壤含水量有关,而且能在短时间内适应干旱,从而维持较高的根活力水平.在试验苗木当中,耐旱性较强的树种有:山杏、软枣、核桃、枣树、桑树等 经济树种 和国槐 阔叶树种 、侧柏 针叶树种 及紫穗槐、大叶黄杨 灌木 等,其中山杏、软枣、核桃、桑树、侧柏则表现更为突出.
Method of pot experiment was used to test root vigor of twentyone seedlings under different moisture conditions,the results showed that all the seedlings adapt the environment,within a certain limit of soil drought.However,when the soil moisture was lower than a limit value,seedlings of them would lose their root vigor gradually,so that the seedlings would die.Root vigor of the seedlings was affected not only by the degree of soil moisture,but also adapt the drought in short time and the root vigor had a high level.Among the seedlings tested,the biggest drought endurance seedlings are:the industrial tree species,such as Prunus armeniaca,Diospyros lotus,Juglans cathayensis,Zizyphus jujuba,Morus alba etc.,Sophora japonica (broadleaved tree),Platycladus orientalis (coniferous tree) and the bushes,such as Amorpha fruticosa,Evonymus japonicus etc.Among these,Prunus armeniaca,Diospyros lotus,Juglans cathayensis,Morus alba and Platycladus orientalis are the most outstanding.
出处
《西北植物学报》
CAS
CSCD
2003年第10期1688-1694,共7页
Acta Botanica Boreali-Occidentalia Sinica
基金
陕西省科技攻关项目( 2002K02-G9-04 )
关键词
根系活力
树种
土壤含水量
root vigor
tree species
soil moisture
