文献类型：期刊文献

中文题名：不同营养元素缺乏对火力楠幼苗生长的影响

英文题名：Effects of nutrient deficiency on the growth of Michelia macclurei seedlings

作者：李清莹[1] 文珊娜[1] 姜清彬[1] 仲崇禄[1] 陈羽[1] 张勇[1] 魏永成[1]

第一作者：李清莹

机构：[1]中国林业科学研究院热带林业研究所热带林业研究国家林业局重点实验室

年份：2017

卷号：36

期号：3

起止页码：664-669

中文期刊名：生态学杂志

外文期刊名：Chinese Journal of Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：林业公益性行业科研专项项目(201204304-02);中央公益性院所基金项目(RITFYWZX201506)资助

语种：中文

中文关键词：火力楠;缺素培养;幼苗生长;根系活力

外文关键词：Michelia macclurei; culture with nutrient deficiency; seedling growth; root activity

分类号：S641.201

摘要：采用温室营养液培养法,设置全素、缺氮、缺磷、缺钾、缺钙、缺镁、缺硫、缺铁、缺微量元素9个处理,通过观察幼苗症状,并对生长状况、叶面积、叶绿素、根活力和生物量等进行测定,研究不同营养元素缺乏对火力楠(Michelia macclurei)幼苗生长的影响。结果表明:火力楠幼苗缺氮时症状出现最早,表现最为明显,各缺素症状主要为植株矮小,长势较弱,叶片偏小且呈淡黄色;缺氮对上述各项指标均与对照存在显著差异,对火力楠幼苗的苗高、地径影响最大且均显著低于全素对照,其他缺素对火力楠幼苗在苗高、地径、根活力与叶绿素等差异不显著,但叶面积、生物量和根冠比等存在显著差异。可见,氮素是限制火力楠幼苗生长的主要影响因子。本研究结果可为火力楠幼苗的缺素诊断和合理施肥提供技术参考。
A greenhouse experiment was conducted to understand the effects of nutrient deficiency on the growth of Michelia macclurei. Seedlings were subjected to nine nutrient treatments,i.e.complete nutrient mixture（ CK）,minus nitrogen（ N）,minus phosphorus（ P）,minus potassium（ K）,minus calcium（ Ca）,minus magnesium（ Mg）,minus sulfur（ S）,minus iron（ Fe） and minus trace elements（ Te）. Symptoms were observed and the growth,leaf area,chlorophyll,root activity and biomass were assessed. The results showed that the effect of N deficiency was the most obvious and significantly different from that of the CK. The symptoms included the slower growth and weaker seedlings with small and yellowish leaf blades. Deficiency of other elements did not affect height,diameter,root activity and chlorophyll,but there were significant differences in leaf area,biomass and root / shoot ratio compared to the CK. Therefore,N was the main factor affecting M. macclurei seedling growth. The results of this study provide a theoretical basis for efficient cultivation of M. macclurei.