盐分胁迫对杨树苗期生长和土壤酶活性的影响

应用生态学报 ›› 2005, Vol. 16 ›› Issue (3): 426-430.

盐分胁迫对杨树苗期生长和土壤酶活性的影响

张建锋¹, 张旭东¹, 周金星¹, Franz Makeschin²

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, 北京, 100091;
2. Soil Institute of Dresden Technological University, 01737 Tharandt, Germany

收稿日期:2004-03-10 修回日期:2004-07-05 出版日期:2005-03-15 发布日期:2005-03-15
通讯作者: 张旭东
基金资助:
国家"十五"科技攻关重点项目(2004BA516A13)和国家自然科学基金资助项目(30440034).

Effects of salinity stress on poplars seedling growth and soil enzyme activity

ZHANG Jianfeng¹, ZHANG Xudong¹, ZHOU Jinxing¹, Franz Makeschin ²

1. Silvicultural Laboratory of Forestry, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;
2. Soil Institute of Dresden Technological University, Tharandt 01737, Germany

Received:2004-03-10 Revised:2004-07-05 Online:2005-03-15 Published:2005-03-15

摘要/Abstract

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23.24%、48.56%、70.76%、83.33%和71.77%、83.25%、86.28%、91.39%;P₂地上生物量分别比对照下降72.44%、82.92%、92.82%和94.41%.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10.96%、20.07%、30.96%和37.44%;而P₂土壤中葡萄糖苷酶活性分别比对照下降11.21%、18.94%、34.89%和41.31%,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.

关键词: 杨树, 盐分胁迫, 生长, 酶活性

Abstract: A pot culture experiment with two clones of poplars (P₁ and P₂) 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 P₁ and P₂ 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 P₁ and P₂ 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 P₁ was better than that of P₂.

Key words: Poplar, Salinity stress, Growth, Enzyme activity

中图分类号:

Q948.113

张建锋, 张旭东, 周金星, Franz Makeschin. 盐分胁迫对杨树苗期生长和土壤酶活性的影响[J]. 应用生态学报, 2005, 16(3): 426-430.

ZHANG Jianfeng, ZHANG Xudong, ZHOU Jinxing, Franz Makeschin . Effects of salinity stress on poplars seedling growth and soil enzyme activity[J]. Chinese Journal of Applied Ecology, 2005, 16(3): 426-430.

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