Ana lysis on Nutr ient Character istics in the Root System ofAbies georgei var. sm ith ii in Mount Sejila of Tibet

XIN Xue-bing; KONG Qing-yun; FANG Jiang-ping

The distribution of total nutrient content in the root system direction of Abies georgei var. sm ithii was inthe order of south >west > east > north, ofwhich the contents ofN、K、Fe、Mn were obvious difference among directions, and that of nutrientswas of great difference among variouswidth class of roots, the sequence of the total nutrient content in the rootswas in the order of slender roots >middle ones > thick ones. The total nutrient content in theslender rootswas 1. 46 times that in thick ones, in particular, the contents ofN,Mg, Fe, andMn had an evident rulethat in the roots of tree the total nutrient content increased with their length, and there was the obvious tendency especially in slender roots. The amount of nutrient stored in the root system of tree was influenced by biomass and nutrient content in the roots. The amount of nutrient stored in the rootswas seriallymiddle roots > thick ones > slenderones, and the amount of element stored in the roots was N > K >Mg > Ca >Mn > P > Cu >Na > Fe > Zn with therange of 1. 13～165. 21 g. The amount of abundant nutrient in the root system of fir tree per unit showed that the Nstorage wasmore than that of armand p ine ( Pinus arm andi) , while that the storage ofMgmore than that of armandp ine or Chinese p ine ( Pinus tabulaeform is) , and of the other elementswas less with the contrast to that of armandp ine, sharp tooth oak (Quercus aliena var. acutesena ta) and Chinese p ine.

1. Experimental Centre of Forestry in North China, CAF,Beijing　102300, China

2. Research Institute of Plateau Ecosystem, Agricultural and Stockbreeding College of Tibet, Linzhi　860000, Tibet, China

Received Date: 2006-05-23

Abstract: The distribution of total nutrient content in the root system direction of Abies georgei var. sm ithii was inthe order of south >west > east > north, ofwhich the contents ofN、K、Fe、Mn were obvious difference among directions, and that of nutrientswas of great difference among variouswidth class of roots, the sequence of the total nutrient content in the rootswas in the order of slender roots >middle ones > thick ones. The total nutrient content in theslender rootswas 1. 46 times that in thick ones, in particular, the contents ofN,Mg, Fe, andMn had an evident rulethat in the roots of tree the total nutrient content increased with their length, and there was the obvious tendency especially in slender roots. The amount of nutrient stored in the root system of tree was influenced by biomass and nutrient content in the roots. The amount of nutrient stored in the rootswas seriallymiddle roots > thick ones > slenderones, and the amount of element stored in the roots was N > K >Mg > Ca >Mn > P > Cu >Na > Fe > Zn with therange of 1. 13～165. 21 g. The amount of abundant nutrient in the root system of fir tree per unit showed that the Nstorage wasmore than that of armand p ine ( Pinus arm andi) , while that the storage ofMgmore than that of armandp ine or Chinese p ine ( Pinus tabulaeform is) , and of the other elementswas less with the contrast to that of armandp ine, sharp tooth oak (Quercus aliena var. acutesena ta) and Chinese p ine.

HTML

Reference (16)

[1]	马钦彦. 中国油松生物量的研究[A]. 见:周晓峰. 中国森林生态系统定位研究[M]. 哈尔滨: 东北林业大学出版社, 1994: 500～508
[2]	单建平,陶大立,王淼,等. 长白山阔叶红松林细根周转的研究[J]. 应用生态学报, 1993, 4 (3) : 241～245
[3]	张硕新,雷瑞德,刘广全. 秦岭火地塘林区主要森林类型的营养循环[J]. 西北林学院学报, 1996, 11 (增) : 115～120
[4]	叶功富,黄宝龙. 木麻黄林生态系统营养元素的地球化学循环[J]. 南京林业大学学报, 1998, 22 (1) : 5～8
[5]	刘茜,项文化,蔡宝玉,等. 湿地松人工林养分循环及密度关系的研究[J]. 林业科学, 1998, 34 (3) : 11～17
[6]	刘增文,李雅素. 黄土丘陵区柠条林地养分状况及其循环规律[J]. 生态学杂志, 1997, 16 (6) : 27～29
[7]	刘增文,李玉山,刘秉正,等. 黄土残塬沟壑区刺槐人工林生态系统的养分循环与动态模拟[J]. 西北林学院学报, 1998, 13 ( 2) :34～40
[8]	陈辉. 经济林木生物量与养分循环规律和营养研究概述[J]. 经济林研究, 1999, 17 (3) : 47～49
[9]	李志辉,李跃林,谢耀坚. 巨尾桉人工林营养元素积累、分布和循环的研究[J]. 中南林学院学报, 2000, 20 (3) : 11～19
[10]	Edward A G, Pamela A M. Net p rimary p roductivity and nutrientcycling across a mesic to wet p recip itation gradient in Hawaiianmontane forest[J]. Oecologia, 2001, 128: 431～442
[11]	Attiwill PM , Guthrie H B,Leuning R. Nutrient cycling in a Eucalyptus obliqua forest I. litter p roduction and nutrient return [J].Australian Journal of Botany, 1978, 26 (1) : 79～91
[12]	Sayer1 E J, Tanner1 E V J, Cheesman A W. Increased litterfallchanges fine root distribution in a moist trop ical forest [J]. Plantand Soil, 2006, 281 (1 - 2) : 5～13
[13]	林德喜,刘开汉,罗永发. 尾叶桉营养元素动态和循环分析[J].应用与环境生物学报, 2002, 8 (2) : 148～153
[14]	肖祥希. 马尾松人工林生态系统养分特性的研究[J]. 福建林业科技, 2000, 27 (4) : 14～18
[15]	张金文. 尾叶桉养分循环研究[J]. 西南林学院学报, 2000, 20(1) : 3～7
[16]	林开敏,洪伟,俞新妥,等. 杉木成熟林林下植物生物量及其取样技术研究[J]. 福建林学院学报, 2001, 21 (1) : 28～31

Ana lysis on Nutr ient Character istics in the Root System ofAbies georgei var. sm ith ii in Mount Sejila of Tibet

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Proportional views