A study on Ecological Stoichiometric Characteristics of C,N and P in three kinds of plant leaves and their community litters in Shimeiwan of Hainan island

doi:10.13466/j.cnki.lyzygl.2020.04.010

Abstract

Abstract:

It is important to study the contents and quantitative comparisons of carbon(C),nitrogen(N) and phosphorus(P) in plant leaves and litters.In order to elucidate plant community physiological processes and maintain nutrient balance in the ecosystem,this paper is infended for the study of wanning city vatica Forest,casuarina forests and mangroves.By measuring the C,N,and P in the leaves and their community litters of Vatica mangachapoi,Casuarina equisetifolia,and Laguncularia racemosa,the stoichiometric characteristics and differences of C,N,and P in the leaves and their communities of three kinds of plants are analyzed.The results show that the contents of C,N and P in the leaves of the three plants are significantly higher than those of litters(P<0.05).On the contrary,their stoichiometric ratios are significantly lower than those of litters.The nutrients resorption efficiencies of N and P are different,ranging in 18.96%~34.37%,and 44.49%~62.63%,respectively.Among them,P is larger than N,indicating that the nutrient reabsorption capacity of element P is strong.The ratio of N:P of the three plants was V.mangachapoi(16.03)>C.equisetifolia(15.18)>L.racemosa(8.04).The V.mangachapoi tend to be restricted by phosphors(P),C.equisetifolia tends to be restricted by phosphors(P) and nitrogen(N),and the L.racemosa tend to be restricted by nitrogen(N).The results can provide scientific basis for the sustainable development of forest ecosystem in coastal zone.

Key words: vegetation types, litter, nutrient concentration, ecological stoichiometry characteristics

CLC Number:

S718.5

CHEN Yiqing, CHEN Zongzhu, CHEN Xiaohua, LEI Jinrui, WU Tingtian, LI Yuanling. A study on Ecological Stoichiometric Characteristics of C,N and P in three kinds of plant leaves and their community litters in Shimeiwan of Hainan island[J]. FOREST RESOURCES WANAGEMENT, 2020, 0(4): 66-73.

Figures/Tables 6

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植物群落-建群种	项目类型		养分质量分数
植物群落-建群种	项目类型		C		N	P
青皮林 (青皮Vatica mangachapoi)	叶片	(478.00±5.51)A		(17.80±0.06)Aa		(1.80±0.00)Aa
青皮林 (青皮Vatica mangachapoi)	表层凋落物	(448.63±14.65)Bb		(14.43±1.46)Ba		(0.69±0.07)Ba
木麻黄林 (木麻黄Casuarina equisetifolia )	叶片	(515.50±48.59)A		(16.70±0.51)Ab		(1.52±0.24)Ab
木麻黄林 (木麻黄Casuarina equisetifolia )	表层凋落物	(479.22±29.98)Ba		(11.71±1.01)Bb		(0.57±0.14)Bb
红树林 (拉关木Laguncularia racemosa)	叶片	(503.00±8.79)A		(9.03±0.42)Ac		(0.98±0.01)Ac
红树林 (拉关木Laguncularia racemosa)	表层凋落物	(383.50±1.64)Bc		(5.65±0.36)Bc		(0.53±0.10)Bb

植物群落-建群种	养分再吸收效率
植物群落-建群种	N	P
青皮林(青皮Vatica mangachapoi)	18.96	61.88
木麻黄林(木麻黄Casuarina equisetifolia)	29.87	62.63
红树林(拉关木Laguncularia racemosa)	34.37	44.49

项目	指标	C	N	P	C:N	C:P	N:P
叶片	C	1
	N	0.01	1
	P	0.22	0.923^**	1
	C:N	0.14	-0.983^**	-0.853^**	1
	C:P	0.02	-0.982^**	-0.961^**	0.957^**	1
	N:P	-0.01	0.999^**	0.908^**	-0.988^**	-0.976^**	1
表层凋落物	C	1
	N	0.503^**	1
	P	0.07	0.475^**	1
	C:N	-0.456^**	-0.972^**	-0.403^**	1
	C:P	0.26	-0.22	-0.907^**	0.146	1
	N:P	0.448^**	0.574^**	-0.411^**	-0.628^**	0.649^**	1