文献类型：期刊文献

中文题名：磷肥对闽楠苗木生长及叶片氮磷钾浓度的影响

英文题名：Effects of phosphorus fertilization on growth and foliar nutrient( N,P,K) of Phoebe bournei seedlings

作者：王东光[1] 尹光天[1] 杨锦昌[1] 李荣生[1] 邹文涛[1] 贾瑞丰[1]

第一作者：王东光

机构：[1]中国林业科学研究院热带林业研究所

年份：2014

卷号：38

期号：3

起止页码：40-44

中文期刊名：南京林业大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：中国林科院基本科研业务费专项资金项目(CAFYBB2011005-8);"十二五"国家科技支撑计划(2012BAD01B04);广东省林业科技创新项目(2010KJCX002-01)

语种：中文

中文关键词：闽楠;磷素;生长表现;叶片养分含量

外文关键词：Phoebe bournei;phosphorus;growth performance;leaf nutrient concentration

分类号：Q945.12

摘要：为了确定闽楠苗木的适宜施磷量，测定了8个水平施磷（0、7．5、15、22．5、30、40、60、90 mg/株）处理下闽楠苗木的生长特性和叶片养分状况。结果表明：（1）随着磷素供应水平的升高，闽楠苗高和总生物量均呈先升高后稳定的趋势，而地径呈增长-稳定-降低的趋势，拐点磷素供应量为22．5 mg/株；（2）随着磷素供应量的增加，闽楠苗木叶片氮和磷含量呈升高趋势，而钾含量先升高后降低；当供磷量大于22．5 mg/株时，生物量未发生显著变化，说明此时植株对氮磷钾为奢侈消耗；（3）闽楠苗木叶片氮磷钾的临界含量分别为16．04、1．36和21．93 g/kg，最适含量范围分别为16．04～27．45、1．36～3．01和21．93～36．40 g/kg。综合分析认为，对闽楠苗木的最适施磷量为22．5～30？0 mg/株。
To determine the optimal phosphorus need of Phoebe bournei seedlings, a pot trial was conducted with fertili-zation at levels of 0,7.5,15,22.5,30,40,60,90 mg per seedling. And the growth characteristics and foliar nutrient status of Ph. bournei seedlings were measured. The results indicated that：（ 1） Height and total biomass of Ph. bournei seedlings displayed growth-stability, with the increase of phosphorus supply,the ground diameter firstly went up, then was stable, finally decreased.（2） The leaf N and P concentrations grew up, but K display accelerated then went down as the phos-phorus addition increased. The total dry biomass did not significantly change when phosphorus was above 22. 5 mg per plant. So it suggested that the N, P and K were luxury consumed. （3） The critical values of N, P and K in leaf of Phoe-be bournei seedlings were 16. 04, 1. 36 and 21. 93 g/kg, respectively, while their optimum concentration range were 16.04-27？45,1.36-3.01 and 21.93-36.40 g/kg,respectively. Therefore,the optimal phosphorus amount for Ph. bournei seedlings might be 22.5-30？0 mg per seedling.