环境因子对不同种类人工乔木林分蒸腾耗水的影响

doi:10.13866/j.azr.2023.08.12

Abstract

Abstract:

This study aims to explore the transpiration response of different artificial arbor stands to environmental factors in arid areas and provide a theoretical basis for selecting transplanted artificial vegetation and maintaining the ecological environment in mining areas. In this study, the EMS81 Sap flow meter stemflow monitoring system and Watch Dog soil moisture sensor were used to monitor trunk sap flow in artificial Populus tomentosa and Pinus tabulaeformis stands in the Shengli East No. 2 mining area of Xilinhot, as well as the soil moisture near their respective roots. Meteorological data from the local national meteorological station were incorporated to analyze the variations in transpiration between the Populus tomentosa and Pinus tabulaeformis stands. Stepwise regression modeling was employed to assess the transpiration of Populus alba and Pinus tabulaeformis stands across different months and various environmental factors. During the first ten days of May, Populus tomentosa and Pinus tabulaeformis exhibited similar change trends in daily transpiration. However, for the remaining period, Populus tomentosa exhibited a more intense change in daily transpiration than Pinus tabulaeformis. During the periods with no significant changes in soil moisture, the soil moisture content near the roots of Pinus tabulaeformis at depths of 30 cm, 50 cm, 70 cm, and 90 cm was significantly higher than that near the roots of Populus alba at the same depths. The maximum transpiration value of poplar stands and the corresponding soil water changes at different root depths were correlated in May, July, and September, while those of Chinese pine stands were correlated in June and August. The number of entry factors and the contribution rate of stepwise regression models varied across different time intervals. Under natural conditions, the changes in transpiration of Populus tomentosa and Pinus tabulaeformis stands in arid areas differ significantly between months and are affected to varying degrees by changes in soil moisture. Moreover, the soil water holding capacity of Pinus tabulaeformis roots was better than that of Populus tomentosa roots during periods of minimal or insignificant changes in soil water. Monthly stepwise regression provides an improved fit for stand transpiration.

Key words: artificial trees, stand transpiration, environmental factors, soil moisture, stepwise regression

LI Jiannan, SHI Haibin, MIAO Qingfeng, SHAN Dan, RONG Hao, WEN Yaqin. Effect of environmental factors on the transpiration water consumption of various artificial arbor stands[J].Arid Zone Research, 2023, 40(8): 1312-1321.

Figures/Tables 7

Tab. 1

Fig. 1

Fig. 2

Tab. 2

Correlation between TY， TS and environmental factors"

环境因子	$T Y$		$T S$
环境因子	相关性	显著性（双侧）	相关性	显著性（双侧）
$R s$	0.251^**	0.002	0.213^**	0.009
$R H$	-0.080	0.332	-0.129	0.12
$T m e a n$	0.437^**	0	0.392^**	0
$u 6$	-	-	0.032	0.701
$u 9$	-0.530	0.525	-	-
$P$	-0.202^*	0.014	-0.090	0.277
$θ Y 5$	0.380^**	0	-	-
$θ Y 15$	0.449^**	0	-	-
$θ Y 30$	0.412^**	0	-	-
$θ Y 50$	0.428^**	0	-	-
$θ Y 70$	0.438^**	0	-	-
$θ Y 90$	0.446^**	0	-	-
$θ S 5$	-	-	0.256^**	0.002
$θ S 15$	-	-	0.358^**	0
$θ S 30$	-	-	0.337^**	0
$θ S 50$	-	-	0.419^**	0
$θ S 70$	-	-	0.407^**	0
$θ S 90$	-	-	0.500^**	0

Tab. 2

Tab. 3

Correlation between T Y, T S and maximum daily change of soil moisture in each layer"

月份	土壤深度 /cm	$T Y$		$T S$
月份	土壤深度 /cm	相关性	显著性（双侧）	相关性	显著性（双侧）
5	5	0.206	0.267	-0.105	0.574
	15	0.675^**	0.000	0.182	0.327
	30	-0.084	0.653	0.037	0.845
	50	-0.039	0.836	0.051	0.784
	70	0.086	0.647	0.155	0.404
	90	-0.518^**	0.003	0.009	0.962
6	5	-0.088	0.643	-0.426^*	0.019
	15	-0.070	0.712	-0.240	0.200
	30	-0.068	0.720	-0.137	0.471
	50	-0.057	0.766	-0.064	0.736
	70	-0.059	0.756	-0.056	0.767
	90	-0.045	0.813	-0.084	0.660
7	5	-0.479^**	0.006	-0.198	0.286
	15	-0.490^**	0.005	-0.046	0.807
	30	-0.421^*	0.018	0.347	0.056
	50	-0.426^*	0.017	0.047	0.803
	70	-0.344	0.058	0.247	0.180
	90	-0.247	0.181	0.339	0.062
8	5	-0.066	0.725	-0.193	0.298
	15	0.026	0.888	0.162	0.384
	30	0.137	0.462	0.404^*	0.024
	50	0.141	0.449	0.054	0.775
	70	-0.065	0.730	-0.097	0.604
	90	-0.029	0.875	-0.050	0.790
9	5	-0.147	0.484	-0.141	0.503
	15	-0.131	0.531	-0.265	0.200
	30	-0.159	0.448	-0.044	0.835
	50	-0.654^**	0.000	0.235	0.259
	70	-0.401^*	0.047	-0.077	0.714
	90	0.686^**	0.000	0.321	0.117

Tab. 3

Tab. 4

Multivariate stepwise linear regression model of TY, TS and environmental factors in each month"

月份	因变量	进入顺序	进入因子	逐步回归方程	R²
5	$T Y$	1	$T m e a n$	$T Y$ =1.228+0.05T_mean	0.288
	$T S$	1	$T m e a n$	$T S$ =0.923+0.014T_mean	0.255
		2	$θ Y$	$T S$ =0.298+0.016T_mean+8.337θ_Y	0.414
6	$T Y$	1	$R H$	$T Y$ =3.582-0.019RH	0.393
		2	$θ Y$	$T Y$ =2.969-0.019RH+3.943θ_Y	0.520
	$T S$	1	$R H$	$T S$ =1.83-0.011RH	0.314
		2	$θ S$	$T S$ =1.518-0.01RH+3.534θ_S	0.446
		3	$R s$	$T S$ =0.331-0.006RH+4.07θ_S+0.4R_s	0.564
7	$T Y$	1	$R s$	$T Y$ =0.754+0.069R_s	0.398
		2	$θ Y$	$T Y$ =0.485+0.074R_s+1.855θ_Y	0.479
	$T S$	1	$θ S$	$T S$ =0.746+6.388θ_S	0.193
8	$T Y$	1	$P$	$T Y$ =2.639-0.069P	0.320
		2	$T m e a n$	$T Y$ =1.86-0.058P+0.048T_mean	0.476
		3	$θ Y$	$T Y$ =1.972-0.058P+0.048T_mean-3.193θ_Y	0.550
	$T S$	1	$T m e a n$	$T S$ =0.101+0.066T_mean	0.725
9	$T Y$	1	$θ Y$	$T Y$ =5.49-73.964θ_Y	0.188
		2	$T m e a n$	$T Y$ =5.199-84.678θ_Y+0.052T_mean	0.408
		3	$R s$	$T Y$ =8.082-130.646θ_Y+0.067T_mean-0.055R_s	0.516
	$T S$	1	$T m e a n$	$T S$ =0.768+0.028T_mean	0.363
		2	$R H$	$T S$ =1.004+0.027T_mean-0.003RH	0.486
		3	$P$	$T S$ =1.209+0.023T_mean-0.006RH-0.01P	0.595

Tab. 4

Tab. 5

Multivariate stepwise linear regression model of TY, TS and environmental factors in the study period"

因变量	进入顺序	进入因子	逐步回归方程	R²
$T Y$	1	$T m e a n$	$T Y$ =1.51+0.042T_mean	0.191
	2	$θ Y$	$T Y$ =0.581+0.045T_mean+11.558θ_Y	0.335
	3	$P$	$T Y$ =0.637+0.045T_mean+11.147θ_Y-0.013P	0.366
$T S$	1	$θ S$	$T S$ =0.789+5.667θ_S	0.171
	2	$T m e a n$	$T S$ =0.421+6.212θ_S+0.019T_mean	0.358
	3	$θ S y$	$T S$ =0.387+7.131θ_S+0.018T_mean-6.699θ_Sy	0.382
	4	$R H$	$T S$ =0.387+7.131θ_S+0.018T_mean-6.699θ_Sy-0.002RH	0.408

Tab. 5

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编号	高度/m	胸径/cm	树皮和韧皮部厚度/cm	距地面1.5 m处周长/cm	冠幅
Y1	8.8	18.94	0.5	59.5	2.32 m×2.13 m
S1	3.2	12.01	0.4	37.7	1.39 m×1.68 m
Y2	8.3	17.52	0.45	55	2.08 m×1.97 m
S2	3.8	13.47	0.4	42.3	1.43 m×1.73 m

Effect of environmental factors on the transpiration water consumption of various artificial arbor stands

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