P肥对邓恩桉生长与叶片养分状况的影响  

Effects of phosphorus fertilizations on tree growth and leaf nutrient status of Eucalyptus dunnii plantation

作　　者：张宁南[1] 吴炜 徐大平[1] 李建文 李树忠 杨曾奖[1] 

机构地区：[1]中国林业科学研究院热带林业研究所,广东广州510520 [2]福建永安林业集团公司,福建永安366000

出　　处：《中南林业科技大学学报》2010年第6期32-37,42,共7页Journal of Central South University of Forestry & Technology

基　　金：十一五"科技支撑项目"桉树相思速生纸浆林可持续经营管理技术研究"(2006BAD32B02);"桉树速生丰产林长期生产力维护与持续经营技术研究"(2006BAD24B0203)的部分研究内容

摘　　要：研究了施用不同梯度P肥对邓恩桉生长、叶片养分及相关性的影响。福建永安的试验表明:施P肥能在幼林期促进邓恩桉树高和胸径的生长,提高叶片P的浓度,但随时间推移施肥作用22个月时达到最大,此后作用减弱,46个月后P供应充足时这种促进作用仍然明显。由于施P肥提高了邓恩桉的保存率,所以也显著地提高了邓恩桉林的蓄积量。低P处理时,树木保存率低,林分过于空旷也影响林分生长。施P肥还增加了叶片N、P和K的养分浓度,B的供应不足会抑制P、K吸收。The effects of P fertilization on tree growth and leaf nutrient status of Eucalyptus dunnii plantation were studied in Yong＇an,Fujian.The results show that P fertilization increased tree growth and leaf nutrient content,the low survival rate in low P treatments could increase tree growth in late stage of the plantation,and the insignificant effect of P treatments at three years old was partly due to the change of survival rate in different P treatments.Leaf and soil sample analysis further proves that P fertilization promoted tree growth in the early stage.

关 键 词：邓恩桉 梯度施肥 蓄积量 初展叶 

分 类 号：S792.39[农业科学—林木遗传育种]