摘要
通过设置钙元素不同的浓度梯度(缺乏、低量和过量),调查养分胁迫对桉树幼苗生长的影响。试验结果表明:CK(未浇灌营养液)处理桉树幼苗各生长指标和叶绿素含量均最低,1(完全营养液)处理其值最高,根系状况的变化趋势则相反,分枝数各处理差异不大;培养初期,各指标差异较小,随培养时间的增加,各指标差异逐渐变大;培养前期,桉树幼苗对养分低量胁迫较敏感,培养后期,对养分过量胁迫较敏感。
Different concentration gradients （deficiency, low volume and overdose） of calci- um element were set up to study the influence of nutrient stress on the growth of Eucalyptus seedling. The results indicated that the growth index and the chlorophyll content of Eucalyptus seedlings of CK （clear water） were the lowest, and that of treatment 1 （complete nutrition solu- tion） were the highest, and the changing trend of root status was reverse. The branch number in the two treatments had not significant difference. The measured indexes showed little difference at the beginning of the culture stage, but finally showed bigger difference. In the early stage of cul- ture, Eucalyptus seedlings were more sensitive to low nutrient stress, but later were more sensitive to nutrient excess.
出处
《农业研究与应用》
2012年第4期1-5,共5页
Agricultural Research and Application
基金
广西林科院基本科研业务费项目(林科200804号)
关键词
桉树
养分胁迫
苗高
生物量
Eucalyptus
nutrient stress
seedling height
biomass
