|本期目录/Table of Contents|

[1]樊后保,刘文飞** 苏兵强.马尾松林下栽植闽粤栲对生态系统养分循环的影响*[J].应用与环境生物学报,2008,14(05):610-615.
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马尾松林下栽植闽粤栲对生态系统养分循环的影响*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
14卷
期数:
2008年05期
页码:
610-615
栏目:
研究论文
出版日期:
2008-09-15

文章信息/Info

作者:
樊后保1 2 刘文飞1** 苏兵强3
(1南昌工程学院生态与环境科学研究所南昌 330099)(2福建农林大学林学院福州 350002; 3福建省国有林场管理局福州 350003)
关键词:
马尾松闽粤栲林下栽植养分归还养分利用系数养分循环
文献标志码:
A
摘要:
通过定位监测和取样分析,研究了马尾松林下栽植闽粤栲对生态系统养分循环的影响. 结果表明:林木各组分养分含量排列顺序表现为叶>枝>皮>根>干.总体而言,在马尾松林下套种阔叶树后,除N、Ca 元素外,各组分其它养分含量普遍高于纯林. 土壤养分元素含量排列顺序为K>Mg>Ca>N>P,混交林土壤中N、P元素含量要高于纯林. 马尾松混交林中,林木5种元素总量为3 801.45 kg hm-2 ,比纯林高71.57% ;养分元素的年净积累量为267.74 kg hm-2 a-1 , 是纯林养分净积累量的2.30 倍;养分总归还量为426.27 kg hm-2 ,是纯林的1.69 倍. 混交林养分利用系数为:N (0.14),P
(0.10),K (0.49),Ca (0.16),Mg (0.20) ;周转时间(a) 为:N (15.52),P (94.70),K (2.66),Ca (9.87),Mg (7.53). 纯林养分利用系数为:N (0.13),P (0.06),K (0.31),Ca (0.16),Mg (0.20) ;周转时间(a) 为:N (16.83),P (105.27),K (3.95),Ca (8.69),Mg (6.91). 林下栽植阔叶树使林木的N、P、K元素的周转期缩短,养分利用系数增加. 因此,将现有的马尾松纯林改造成混交林是解决目前马尾松纯林地力衰退的一个非常好的途径. 表6 参20

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更新日期/Last Update: 2008-12-11