[1]李靖,马永禄,罗杰,等. 黄土丘陵沟壑区不同林龄刺槐林养分特征与生物量研究[J].西北林学院学报,2013,28(03):7-12.[doi:10.3969/j.issn.1001-7461.2013.03.02]
　LI Jing,MA Yong-lu,LUO Jie,et al. Nutrients and Biomass of Different-aged Robinia pseudoacacia Plantations in the Loess Hilly Region[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2013,28(03):7-12.[doi:10.3969/j.issn.1001-7461.2013.03.02]
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 黄土丘陵沟壑区不同林龄刺槐林养分特征与生物量研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第28卷
期数:
2013年03期
页码:
7-12
栏目:
出版日期:
2013-05-30

文章信息/Info

Title:
 Nutrients and Biomass of Different-aged Robinia pseudoacacia Plantations in the Loess Hilly Region
文章编号:
1001-7461(2013)03-0007-06
作者:
 李靖; 马永禄; 罗杰; 李红; 罗志斌
 （1. 西北农林科技大学 生命科学学院，陕西 杨陵 712100；2. 西北农林科技大学 植物保护学院，陕西 杨陵 712100；3. 西北农林科技大学 林学院，陕西 杨陵 712100）
Author(s):
 LI Jing ;  MA Yong-lu; LUO Jie; LI Hong; LUO Zhi-bin
 (1.College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.College of Plant Protection,Northwest A&F University, Yangling, Shaanxi 712100， China; 3.College of Forestry,Northwest A&F University, Yangling, Shaanxi 712100, China)
关键词:
 ; 人工刺槐林; 土壤养分; 营养元素; 生物量; 黄土丘陵区
Keywords:
Robinia pseudoacacia plantation;  soil nutrient;  nutrient element;  biomass;  Loess hilly region
分类号:
S792.26
DOI:
10.3969/j.issn.1001-7461.2013.03.02
文献标志码:
A
摘要:
 以农田为对照，分析了黄土丘陵沟壑区不同林龄人工刺槐林表层土壤有机碳、氮、磷、钾含量、林木根茎叶中N、P、K含量和生物量。结果表明，各林龄刺槐林土壤有机碳、全氮和全钾含量均高于农田地，土壤有机碳和全氮含量依次为15 a＞20 a＞10 a＞5 a；全钾含量为20 a＞15 a＞5 a＞10 a。农田地全磷含量是各林龄刺槐林地磷含量的3.2～3.9倍。刺槐根和叶中N、P含量随着林龄的增加而增加，K含量则表现出相反趋势；茎中N、P、K含量变化不大。不同林龄刺槐生物量的器官分配比例虽有所不同，但均以茎所占的比例最大，根次之，叶最小。可见在造林15 a后，该地区土壤养分情况得到了明显的改善。
Abstract:
 To investigate nutrient status of different-aged Robinia pseudoacacia plantations in the Loess hilly region of China, soil organic carbon (SOC), total nitrogen (N), phosphorus (P) and potassium (K) in soils and in root, stem and leaf tissues, and plant biomass were analyzed. SOC contents, soil N and K concentrations were higher under the plantations compared to those in the farmland. The order of SOC and soil N concentrations was 15 a>20 a>10 a>5a and of soil K was 20 a>15 a>5 a>10 a. Soil P concentration of the farmland was 3.2 to 3.9 times higher than those of plantations. Concentrations of N and P in roots and leaves elevated with the increases of the age of plantations, but the opposite pattern was found for K concentrations in roots and leaves. Concentrations of N, P and K in stem remained unchanged across different-aged plantations. Among biomass of different tissues in different-aged plantations, the order of biomass allocation was stems>roots>leaves. These results indicate that afforestation significantly improves soil nutrients.

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备注/Memo

备注/Memo:
 收稿日期：2013-01-12  修回日期：2013-03-01
基金项目：国家重点基础研究发展计划（“973”计划）项目（2012CB416902）；中国科学院知识创新工程重要方向项目(KZCX2-YW-443)；教育部新世纪优秀人才支持计划项目（NCET-08-0468）。
作者简介：李靖，男，在读硕士，研究方向:植物生态生理。 E-mail: lijing1020@163.com
*通信作者：罗志斌，男，教授，博士生导师，研究方向:植物生态生理与分子生理。E-mail: luozhibin@nwsuaf.edu.cn
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