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	福建东山短枝木麻黄小枝氮磷含量及其再吸收率季节动态; Seasonal dynamics of nitrogen and phosphorus concentrations,and nutrient resorption efficiencies of Casuarina equisetifolia branchlets in Dongshan County,Fujian
	叶功富 ; 张立华 ; 林益明 ; 王亨 ; 周海超 ; 曾琦
	2009
关键词	短枝木麻黄 氮 磷 养分再吸收率 养分再吸收程度 Casuarina equisetifolia nitrogen phosphorus nutrient resorption efficiency nutrient resorption proficiency
英文摘要	对福建东山赤山林场短枝木麻黄纯林小枝中的n和P含量、n∶P比、养分再吸收率的季节动态进行研究。结果表明,随着小枝的成熟和衰老,各季节n和P的含量依次降低,其中衰老小枝中n和P含量分别为(3.97±0.21)~(8.64±0.58)Mg·g-1和(0.04±0.03)~(0.10±0.03)Mg·g-1,基本上表现为n和P的完全再吸收。成熟小枝n∶P比的季节动态介于(18.67±3.24)~(37.98±1.32)之间,均高于16,表明木麻黄的生长受到不同程度的P限制。n、P再吸收率的季节变化分别为(51.02±4.66)%~(63.00±8.61)%和(81.24±5.08)%~(91.78±5.84)%,P再吸收率显著高于n。n和P的再吸收率之间以及成熟叶中n、P含量与二者再吸收率之间没有显著相关性,但在衰老叶中存在显著负相关,表明养分再吸收程度越高,其再吸收率就越高。因此,木麻黄通过小枝衰老过程中的养分再吸收,减少养分的损失,从而适应贫瘠的立地条件。; Seasonal dynamics of nitrogen and phosphorus concentrations,N∶P ratios and nutrient resorption efficiency of Casuarina equisetifolia branchlets was studied at Chishan Forestry Center of Dongshan County,Fujian Province,China.The results showed that N and P concentrations were highest in young branchlets and decreased with maturity and senescence.N and P concentrations of senescent branchlets ranged from (3.97±0.21) to (8.64±0.58) mg g-1 and (0.04±0.03) to (0.10±0.03) mg g-1,respectively.N∶P ratios of mature branchlets ((18.67±3.24)--(37.98±1.32)) were all above 16 through the year,showing P was more limiting than N.Nitrogen resorption efficiency (REN) and phosphorus resorption efficiency (REP) were from (51.02±4.66)% to (63.00±8.61)% and from (81.24±5.08)% to (91.78±5.84)% through the year,respectively,and REP was significantly higher than REN.There is no significant correlation between REN and REP.REN is not correlated with either N concentration or N:P ratios in mature branchlets,no correlation was also found between REP and either P concentration or N∶P ratios in mature branchlets.While the significant negative correlation was observed in senescent branchlets.; 国家“十一五”科技支撑计划资助项目(2006BAD03A14-01);福建省科技重大资助项目(2006NZ0001-2);国家林业局南方山地用材林培育重点实验室资助项目
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/118873]
专题	生命科学－已发表论文
推荐引用方式 GB/T 7714	叶功富,张立华,林益明,等. 福建东山短枝木麻黄小枝氮磷含量及其再吸收率季节动态, Seasonal dynamics of nitrogen and phosphorus concentrations,and nutrient resorption efficiencies of Casuarina equisetifolia branchlets in Dongshan County,Fujian[J],2009.
APA	叶功富,张立华,林益明,王亨,周海超,&曾琦.(2009).福建东山短枝木麻黄小枝氮磷含量及其再吸收率季节动态..
MLA	叶功富,et al."福建东山短枝木麻黄小枝氮磷含量及其再吸收率季节动态".(2009).

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