桉树幼苗缺素症状的研究  

The Symptoms of Nitrogen,Phosphorus and Potassium Deficiency in Eucalyptus Seedlings

作　　者：理永霞[1] 茶正早[1] 罗微[1] 贝美容[1] 林清火[1] 

机构地区：[1]中国热带农业科学院橡胶研究所农业部热带作物栽培生理学重点开放实验室,海南儋州571737

出　　处：《土壤通报》2009年第2期290-293,共4页Chinese Journal of Soil Science

基　　金：科技部农业科技成果转化资金项目"桉树营养诊断指导施肥技术的转化与推广(04EFN214600244)

摘　　要：通过砂培法对桉树U6幼苗氮、磷、钾缺乏时表现症状进行了研究,旨在为生产中直观判断养分的丰缺提供理论依据。结果表明:形态和生长状况方面,缺K处理前期表现生长良好,但后期最先表现出缺素焦枯症状,其次是缺N、缺P处理,说明桉树苗木前期需钾肥相对较少;生理指标、叶绿素含量、光合速率、根系活力以及干重中均是缺N的表现最低,其次是缺K,缺P的表现相对较高,这说明N、P、K三种元素缺乏都能对桉树幼苗造成伤害,N元素表现尤其明显。The sand culture were used to studied the symptoms on eucalyptus U6 seedlings due to the deficiency of nitrogen, phosphorus and potassium. The results showed the K deficiency in later period had significant effects on morphology of eucalyptus seedlings, followed by the lack of N and P. Physiological indicators （chlorophyll content, photosynthetic rate, live roots edge and dry weight） were greatly affected by N lack, next were deficiency of K and P. The deficiency of N, P and K could lead to injury of eucalyptus seedlings.

关 键 词：桉树幼苗 氮 磷 钾 缺素症 

分 类 号：S792.39[农业科学—林木遗传育种]