文献类型：期刊文献

中文题名：盐分胁迫对杨树苗期生长和土壤酶活性的影响

英文题名：Effects of salinity stress on poplars seedling growth and soil enzyme activity

作者：张建锋[1] 张旭东[1] 周金星[1] Franz Makeschin[2]

机构：[1]中国林业科学研究院林业研究所,国家林业局林木培育实验室;[2]Soil Institute of Dresden Technological University,01737 Tharandt,Germany

年份：2005

卷号：16

期号：3

起止页码：426-430

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：MEDLINE(收录号：15943350);CSTPCD;;Scopus(收录号：2-s2.0-25844438775);北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；PubMed;

基金：国家"十五"科技攻关重点项目 ( 2 0 0 4BA5 1 6A1 3);国家自然科学基金资助项目 ( 30 4 4 0 0 34) .

语种：中文

中文关键词：杨树;盐分胁迫;生长;酶活性

外文关键词：Poplar, Salinity stress, Growth, Enzyme activity

分类号：Q948.113

摘要：通过盐分胁迫下杨树 2个无性系的盆栽试验 ,发现盐分对苗木的生长有一定的抑制作用 .随着盐分浓度的提高 ,苗高、地上与地下部分生物量都呈下降趋势 ;当盐分浓度为 0 2 %、0 4 %、0 6 %和 0 8%时 ,P1、P2 的新稍生长量分别比对照下降 2 3 2 4 %、4 8 56 %、70 76 %、83 33%和 71 77%、83 2 5%、86 2 8%、91 39% ;P2 地上生物量分别比对照下降 72 4 4%、82 92 %、92 82 %和 94 4 1 % .回归分析发现 ,盐分浓度与叶片叶绿素含量之间存在线性相关关系 ,与脯氨酸含量之间存在抛物线形相关关系 .土壤中盐分的增加不仅影响到植物的生长发育 ,而且对土壤自身的物理、化学性状也产生不良效应 .同时测定了盆栽土壤中葡萄糖苷酶和左旋天门冬酰胺酶活性的变化 .结果表明 ,两种酶活性都随土壤中盐分浓度的提高而下降 .当盐分浓度为 0 2 %、0 4 %、0 6 %和 0 8%时 ,P1土壤中葡萄糖苷酶活性分别比对照下降了1 0 96 %、2 0 0 7%、30 96 %和 37 4 4% ;而P2 土壤中葡萄糖苷酶活性分别比对照下降 1 1 2 1 %、1 8 94 %、34 89%和 4 1 31 % ,说明盐分对土壤的理化性状和肥力状况都产生了不良影响 .参试的 2个无性系中 ,P1的耐盐能力强于P2 .
A pot culture experiment with two clones of poplars (P 1 and P 2) showed that soil salinity had a definite inhibitory effect on the establishment and growth of seedlings.The survival rate,seedling height and weight,and root weight were all declined with increasing soil salinity.When the salinity was 0.2%,0.4%,0.6% and 0.8%,the shoot growth of P 1 and P 2 decreased by 23.24%,48.56%,70.76% and 83.33%,and 71.77%,83.25%,86 28% and 91.39%,respectively,in comparing with the control.Regressive analyses showed that soil salinity had a linear relationship with chlorophyll content,and a binomial relationship with leaf proline content. The activities of soil β glucosidase and L asparaginase were decreased with increasing soil salinity.When the salinity was 0 2%,0 4%,0.6% and 0 8%,the β glucosidase activity in P 1 and P 2 soils decreased by 10.96%,20.07%,30.96% and 37.44%,and 11.21%,18.94%,34.89% and 41.31%,respectively.The salinity tolerance of P 1 was better than that of P 2.