Response of radial growth of early and late wood of planted Pinus tabuliformis to climate variables

doi:10.17521/cjpe.2023.0206

Abstract

Abstract:

Aims Under the background of global warming, the plantation of Pinus tabuliformis is highly sensitive to climate change. However, the impacts of climate change on the radial growth of the earlywood and latewood are still less understood. Therefore, it is important for predicting the productivity and vegetation dynamics of the plantations to understand the responses of radial growth of earlywood and latewood to climate change.

Methods Based on dendrochronology, we established the standard chronology of earlywood and latewood tree rings from five sampling sites in the northern and northwest China. Furthermore, we analyzed the relationship between annual ring width index and climate variables, and investigated the relative influence of climate variables on the growth of P. tabuliformis.

Important findings Air temperature showed a significant increasing trend from 1980 to 2020, and regional climate was becoming warmer and drier. The ring widths of P. tabuliformis at Kangle (KL), Tianshui (TS) and Lingshou (LS) were higher than those at Xunyi (XY) and Chunhua (CH). Compared with CH and XY, the total ring width and earlywood width at TS, KL and LS showed a smaller decreased trend. The chronology of earlywood of P. tabuliformis showed positive correlations with precipitation in last September and during the pre-growing season of current year. The latewood largely showed a positive correlation with air temperature throughout the whole year. The radical growth in P. tabuliformis was positively correlated with averaged air temperature and maximum air temperature from March to April, especially in LS, KL and TS. It is indicated that the radial growth of earlywood and latewood was significantly correlated with climate factors during the growing season. The responses of radial growth to climate variables between earlywood and latewood were different. The relative influence of air temperature on the width change of the latewood increased by 21.89%, 8.63%, 3.31% and 7.25% compared to the earlywood in LS, CH, TS and KL, respectively. The latewood was more sensitive to air temperature than earlywood. Therefore, considering the difference in response to climate change between early and late wood chronology is helpful for improving the quality of regional climate reconstruction in the future.

Key words: Pinus tabuliformis, earlywood, latewood, climate change, relative influence

SHI Qian, TONG Xiao-Juan, XU Ling-Ling, MENG Ping, YU Pei-Yang, LI Jun, YANG Ming-Xin. Response of radial growth of early and late wood of planted Pinus tabuliformis to climate variables[J]. Chin J Plant Ecol, 2024, 48(8): 988-1000.

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Figures/Tables 7

References 53

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样地 Site	经纬度 Longitude and latitude	海拔 Altitude (m)	胸径(平均值±标准差) DBH (mean ± SD) (cm)	树高(平均值±标准差) Tree height (mean ± SD) (m)	株数 Number of plants	密度 Density (Ind.·hm^-2)	气象时间序列 Meteorological series
旬邑县 XY	35.07° N, 108.50° E	1 647	20.64 ± 5.64	11.90 ± 1.23	183	976	1973-2020
淳化县 CH	34.83° N, 108.65° E	1 189	16.56 ± 3.38	14.40 ± 1.65	83	1 328	1980-2020
天水市小陇山 TS	35.32° N, 106.43° E	1 633	21.66 ± 4.93	13.56 ± 1.93	104	549	1977-2020
康乐县太子山 KL	35.25° N, 103.42° E	2 493	23.79 ± 4.79	13.49 ± 1.89	112	581	1975-2020
灵寿县五岳寨 LS	38.67° N, 103.85° E	997	22.14 ± 6.31	10.26 ± 6.22	94	501	1961-2020

样地 Site	经纬度 Longitude and latitude	海拔 Altitude (m)	胸径(平均值±标准差) DBH (mean ± SD) (cm)	树高(平均值±标准差) Tree height (mean ± SD) (m)	株数 Number of plants	密度 Density (Ind.·hm^-2)	气象时间序列 Meteorological series
旬邑县 XY	35.07° N, 108.50° E	1 647	20.64 ± 5.64	11.90 ± 1.23	183	976	1973-2020
淳化县 CH	34.83° N, 108.65° E	1 189	16.56 ± 3.38	14.40 ± 1.65	83	1 328	1980-2020
天水市小陇山 TS	35.32° N, 106.43° E	1 633	21.66 ± 4.93	13.56 ± 1.93	104	549	1977-2020
康乐县太子山 KL	35.25° N, 103.42° E	2 493	23.79 ± 4.79	13.49 ± 1.89	112	581	1975-2020
灵寿县五岳寨 LS	38.67° N, 103.85° E	997	22.14 ± 6.31	10.26 ± 6.22	94	501	1961-2020

采样点 Site	样芯数 Number of core sample	时间序列 Period	类型 Type	平均敏感度 MS	信噪比 SNR	一阶自相关系数 AR	样本总体代表性 EPS
CH	43	1980-2020	整轮 Total ring width	0.396	8.067	0.580	0.890
			早材 Earlywood width	0.418	7.060	0.570	0.876
			晚材 Latewood width	0.567	11.501	0.358	0.920
XY	127	1973-2020	整轮 Total ring width	0.264	12.794	0.673	0.928
			早材 Earlywood width	0.310	13.555	0.679	0.931
			晚材 Latewood width	0.353	11.975	0.347	0.923
TS	124	1977-2020	整轮 Total ring width	0.245	10.465	0.673	0.913
			早材 Earlywood width	0.224	8.778	0.690	0.898
			晚材 Latewood width	0.374	21.569	0.371	0.956
KL	132	1975-2020	整轮 Total ring width	0.239	30.446	0.622	0.968
			早材 Earlywood width	0.282	35.760	0.610	0.973
			晚材 Latewood width	0.363	23.433	0.246	0.959
LS	128	1962-2020	整轮 Total ring width	0.429	10.767	0.444	0.915
			早材 Earlywood width	0.409	9.883	0.457	0.908
			晚材 Latewood width	0.570	8.716	0.315	0.897
ALL	553	1962-2020	整轮 Total ring width	0.429	20.236	0.474	0.953
			早材 Earlywood width	0.409	16.176	0.501	0.942
			晚材 Latewood width	0.570	21.754	0.307	0.956

采样点 Site	样芯数 Number of core sample	时间序列 Period	类型 Type	平均敏感度 MS	信噪比 SNR	一阶自相关系数 AR	样本总体代表性 EPS
CH	43	1980-2020	整轮 Total ring width	0.396	8.067	0.580	0.890
			早材 Earlywood width	0.418	7.060	0.570	0.876
			晚材 Latewood width	0.567	11.501	0.358	0.920
XY	127	1973-2020	整轮 Total ring width	0.264	12.794	0.673	0.928
			早材 Earlywood width	0.310	13.555	0.679	0.931
			晚材 Latewood width	0.353	11.975	0.347	0.923
TS	124	1977-2020	整轮 Total ring width	0.245	10.465	0.673	0.913
			早材 Earlywood width	0.224	8.778	0.690	0.898
			晚材 Latewood width	0.374	21.569	0.371	0.956
KL	132	1975-2020	整轮 Total ring width	0.239	30.446	0.622	0.968
			早材 Earlywood width	0.282	35.760	0.610	0.973
			晚材 Latewood width	0.363	23.433	0.246	0.959
LS	128	1962-2020	整轮 Total ring width	0.429	10.767	0.444	0.915
			早材 Earlywood width	0.409	9.883	0.457	0.908
			晚材 Latewood width	0.570	8.716	0.315	0.897
ALL	553	1962-2020	整轮 Total ring width	0.429	20.236	0.474	0.953
			早材 Earlywood width	0.409	16.176	0.501	0.942
			晚材 Latewood width	0.570	21.754	0.307	0.956