Ecological Stoichiometry Characteristics of C,N and P of Different Components in Premature Aging Plantation Forests of Hippophae rhamnoides ssp.sinensis

doi:10.13466/j.cnki.lyzygl.2023.04.008

Abstract

Abstract:

Sprouting regeneration is one of the main ways in which trees recover from harsh environments or disturbances.In order to understand the nutrient allocation pattern of each component of premature aging in Chinese buckthorn plantations,and to explore the relative accumulation rate of nutrients between rejuvenated offspring and aging mother plants.The stoichiometric characteristics of carbon(C),nitrogen(N)and phosphorus(P)of different components of 15a stands with premature aging characteristics were analyzed.The results showed that:1)The C,N and P content of each components ranged from 255.07~563.68,7.34~24.68 and 0.23~0.68 mg/g,and the C∶N,C∶P and N∶P ratios were 19.63~39.86,648.31~1 188.26 and 26.88~45.47,which differed among the components.2)The accumulation rate of C in the leaves,horizontal roots,and vertical roots of the mother plant was less than that of N or P.The accumulation rate of C in the trunk of the daughter plant was greater than that of N and P,and the accumulation rate of N in the horizontal roots was greater than that of P.3)In the combined change of C,N and P content,trunk of daughter plants,leaves of daughter plants and vertical roots contributed the most,while leaves of mother plants and horizontal roots contributed the least.It follows that:the carbon,nitrogen,and phosphorus accumulation capacity of Chinese buckthorn and its stoichiometric ratio differed among the components,with a greater role played by offspring compared to mother plants and vertical roots compared to horizontal roots.The main nutritional characteristics of premature aging plantations are low carbon accumulation capacity and low C∶N and C∶P ratios in mother plant leaves and horizontal roots,which means that "carbon limitation" or "carbon starvation" is the main nutritional reason for premature aging in plantations.

Key words: carbon, nitrogen and phosphorus, ecological chemometric characteristics, structure differences, premature decline, Hippophae rhamnoides ssp.sinensis plantation forest

CLC Number:

S718.45

LI Zhongmu, NIE Kaihong, TIAN Dengjuan, LIU Shenghong, LU Sai, LI Genqian. Ecological Stoichiometry Characteristics of C,N and P of Different Components in Premature Aging Plantation Forests of Hippophae rhamnoides ssp.sinensis[J]. FOREST RESOURCES WANAGEMENT, 2023, 0(4): 62-70.

Figures/Tables 4

Fig.1

Tab.1

Tab.2

Allometric growth analysis of different components C,N and P

参数	构件	R²	P	斜率	斜率置信区间		截距	截距置信区间		P_-1_.₀	类型
参数	构件	R²	P	斜率	下限	上限	截距	下限	上限	P_-1_.₀	类型
logC&logN	母株叶片	0.748	0.000	0.777 0	0.549 4	1.098 9	1.625	1.230	2.021	0.139	I
	母株枝条	0.751	0.000	1.115 0	0.789 0	1.574 0	1.287	0.839	1.735	0.507	I
	母株树干	0.907	0.000	0.902 7	0.729 6	1.116 8	0.619	1.429	1.808	0.312	I
	垂直根	0.727	0.000	0.568 6	0.396 5	0.815 3	2.049	1.798	2.299	0.005	A
	水平根	0.673	0.001	0.540 7	0.365 2	0.800 6	2.132	1.864	2.400	0.005	A
	子株叶片	0.795	0.000	0.822 9	0.601 4	1.125 9	1.531	1.171	1.891	0.200	I
	子株枝条	0.776	0.000	0.834 5	0.601 2	1.158 4	1.620	1.314	1.926	0.253	I
	子株树干	0.934	0.000	1.599 0	1.336 0	1.915 0	1.019	0.754	1.285	0.000	A
logC&logP	母株叶片	0.892	0.000	0.770 3	0.612 1	0.969 3	2.826	2.806	2.847	0.030	A
	母株枝条	0.871	0.000	0.888 0	0.691 0	1.141 1	2.992	2.882	3.103	0.320	I
	母株树干	0.679	0.001	0.946 2	0.641 0	1.396 8	3.032	2.819	3.245	0.764	I
	垂直根	0.904	0.000	0.596 7	0.480 7	0.740 7	2.917	2.875	2.958	0.000	A
	水平根	0.686	0.001	0.848 4	0.577 2	1.247 1	3.018	2.930	3.106	0.373	I
	子株叶片	0.926	0.000	0.986 9	0.815 7	1.194 0	2.813	2.783	2.844	0.881	I
	子株枝条	0.890	0.000	0.921 9	0.731 1	1.162 4	2.835	2.764	2.905	0.455	I
	子株树干	0.766	0.000	1.408 0	1.008 0	1.968 0	3.304	3.023	3.584	0.045	A
logN&logP	母株叶片	0.733	0.000	0.991 3	0.694 0	1.416 0	1.546	1.504	1.587	0.959	I
	母株枝条	0.770	0.000	0.796 7	0.571 7	1.110 3	1.530	1.397	1.662	0.162	I
	母株树干	0.618	0.002	1.048 0	0.687 0	1.599 0	1.566	1.309	1.822	0.814	I
	垂直根	0.707	0.001	1.049 0	0.723 0	1.524 0	1.527	1.399	1.655	0.784	I
	水平根	0.799	0.000	1.569 0	1.150 0	2.140 0	1.639	1.509	1.769	0.008	A
	子株叶片	0.689	0.001	1.199 0	0.817 0	1.760 0	1.559	1.483	1.635	0.324	I
	子株枝条	0.634	0.002	1.105 0	0.730 0	1.672 0	1.455	1.301	1.610	0.613	I
	子株树干	0.685	0.001	0.880 6	0.598 8	1.295 1	1.428	1.225	1.632	0.489	I

Tab.2

Tab.3

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构件	含量的变异系数/%				化学计量比的变异系数/%
构件	C	N	P	平均值	C∶N	C∶P	N∶P	平均值
母株叶片	1.17	3.22	2.97	2.45	6.88	5.27	3.64	5.26
母株枝条	2.30	1.51	3.35	2.39	3.89	5.98	4.75	4.87
母株树干	3.50	1.12	2.82	2.48	5.44	2.49	3.73	3.89
垂直根	1.22	5.39	2.98	3.20	9.96	4.77	4.87	6.53
水平根	3.16	4.63	3.01	3.60	10.59	8.24	2.23	7.02
子株叶片	0.50	5.18	2.55	2.74	8.92	3.83	6.79	6.51
子株枝条	0.83	4.62	2.96	2.80	8.39	4.58	5.35	6.11
子株树干	4.05	1.66	3.78	3.16	2.22	6.89	3.77	4.29
平均值	2.09	3.42	3.05	2.85	7.04	5.26	4.39	5.56

指标		主成分		主成分得分			排序
指标		F₁	F₂	F₁	F₂	合计	排序
母株叶片	C	-0.084	0.996	-0.014 6	0.044 6	0.030 1
	N	-0.191	-0.982	0.002 3	-0.041 4	-0.039 1	8
	P	-0.986	-0.165	-0.041 6	0.002 0	-0.039 6
母株枝条	C	0.136	0.991	-0.004 8	0.042 3	0.037 5
	N	-0.977	-0.211	-0.040 7	-0.000 1	-0.040 8	4
	P	0.994	-0.107	0.044 9	-0.014 0	0.030 9
母株树干	C	0.998	0.068	0.043 2	-0.006 4	0.036 8
	N	-0.998	-0.065	-0.043 2	0.006 5	-0.036 7	6
	P	0.905	-0.426	0.044 5	-0.027 3	0.017 2
垂直根	C	0.973	-0.233	0.045 3	-0.019 4	0.025 9
	N	-0.403	0.915	-0.027 7	0.044 1	0.016 3	2
	P	0.660	0.751	0.020 9	0.026 8	0.047 7
水平根	C	0.940	0.342	0.037 6	0.006 2	0.043 8
	N	-0.809	-0.588	-0.029 2	-0.018 3	-0.047 4	7
	P	-0.980	-0.197	-0.041 0	0.000 6	-0.040 4
子株叶片	C	0.255	0.967	0.000 7	0.040 1	0.040 8
	N	-0.938	-0.348	-0.037 5	-0.006 5	-0.043 9	3
	P	0.107	0.994	-0.006 2	0.042 7	0.036 6
子株枝条	C	-0.285	0.958	-0.023 0	0.044 9	0.021 8
	N	-0.593	-0.805	-0.017 3	-0.029 8	-0.047 1	5
	P	0.426	0.905	0.008 9	0.035 8	0.044 7
子株树干	C	0.867	0.498	0.032 7	0.013 7	0.046 5
	N	0.475	0.880	0.011 3	0.034 2	0.045 5	1
	P	0.715	-0.699	0.039 1	-0.037 5	0.001 6
特征值		12.892	11.108
方差贡献率/%		53.715	47.285
累积方差贡献率/%		53.715	100.00