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磷肥对闽楠苗木生长及叶片氮磷钾浓度的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年03期
Page:
40-44
Column:
研究论文
publishdate:
2014-05-15

Article Info:/Info

Title:
Effects of phosphorus fertilization on growth and foliar nutrient(N,P,K) of Phoebe bournei seedlings
Article ID:
1000-2006(2014)03-0040-05
Author(s):
WANG DongguangYIN Guangtian*YANG JinchangLI RongshengZOU WentaoJIA Ruifeng
Research Institute of Tropical Forestry, Chinese Academy of Forestry,Guangzhou 510520,China
Keywords:
Phoebe bournei phosphorus growth performance leaf nutrient concentration
Classification number :
Q945.12
DOI:
10.3969/j.issn.1000-2006.2014.03.008
Document Code:
A
Abstract:
To determine the optimal phosphorus need of Phoebe bournei seedlings, a pot trial was conducted with fertilization 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 phosphorus 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 Phoebe 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.

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Last Update: 2014-05-15