Development of Trunk Sap Flow Monitoring System

doi:10.13304/j.nykjdb.2021.0934

Abstract

Abstract:

Trunk sap flow rate is a key indicator for judging the strength of root water absorption and transpiration， and is widely used in the study of tree transpiration water consumption. At present， the plant sap flow meters are generally imported equipment with high prices and a single type of sampling data. Therefore， it is urgent to develop a domestic tree trunk sap flow monitoring system that integrates multiple factors. This paper established a trunk sap flow monitoring system based on tree trunk sap flow and meteorological and soil factors. The TDP sap flow meter based on thermal diffusion technology was used to monitor the branch and trunk sap flow， and the meteorological and soil factor data were collected using multiple types of sensors.The system platform adopt PHP+HTML+MySQL as development language and design tool. Compared with the CK plant sap flow meter， the correlation coefficients of the voltage difference and sap flow rate were 0.834 3 and 0.876 5， respectively. Correlation analysis was carried out on the magnolia sap flow rate during the whole day， daytime and night time by selected environmental factors. The results showed that the environmental factors had different influences on the sap flow rate in different time periods. In addition， a multiple linear regression model of liquid flow rate and environmental factors was established， and the regression model of the whole day time period was well fitted with an R² of 0.674. Compared with foreign equipment， the system had the characteristics of high cost performance， many monitoring indicators， and data visualization of each indicator， So it could be used to study the temporal and spatial variation of tree sap flow rate and environmental factors.

Key words: sap flow, TDP, environmental factors, Magnolia denudata Desr

摘要：

树干液流速率是判断根系水分吸收和蒸腾作用强弱的关键指标，被普遍应用于树木蒸腾耗水研究，常用的植物液流仪普遍是价格高昂、采样数据类型单一的进口设备，因此亟待研发集多因素于一体的树干液流监测系统。基于树干液流及气象和土壤因子建立树干液流监测系统，其采用基于热扩散技术的TDP液流计监测枝干液流，采用多类型传感器实现气象和土壤因素数据的收集，系统平台采用PHP+HTML+MySQL作为开发语言和设计工具。与对照植物液流仪对比，二者电压差、液流速率相关系数分别为0.834 3、0.876 5。选取环境因子对全天、日间、黑夜时段的白玉兰液流速率进行相关性分析，发现不同时段环境因子对液流速率的影响程度不同。此外，建立液流速率与环境因子的多元线性回归模型，其中全天时段的回归模型拟合程度较好，R²为0.674。该系统具有性价比高、监测指标多、各指标数据可视化等特点，可用于研究林木液流速率和环境因子的时空变化规律。

关键词: 树干液流, 热扩散液流探针, 环境因子, 白玉兰

CLC Number:

S758

Biao ZHANG, Dongmei ZHANG, Lang ZHANG, Zhongke FENG, Linhao SUN. Development of Trunk Sap Flow Monitoring System[J]. Journal of Agricultural Science and Technology, 2022, 24(11): 121-129.

张标, 张冬梅, 张浪, 冯仲科, 孙林豪. 树干液流监测系统的研制[J]. 中国农业科技导报, 2022, 24(11): 121-129.

Figures/Tables 9

Fig. 1 Monitoring system of tree sap flow

Fig. 2 System hardware design

Fig. 3 Stem flow sensor

Fig. 4 Voltage difference， sap flow density day dynamic curve comparison

Fig. 5 Daily dynamic curve of meteorological factors

Fig. 6 Daily dynamic curve of soil factors

Table 1 Correlation analysis table of environmental factors of Magnolia sap flow rate

时段 Time	指标 Factor	相关系数 Correlation coefficient
时段 Time	指标 Factor	Ta	RH	WS	Rs	C0₂	VPD	St	Sh	pH
全天 Whole day	Sf	0.675^**	-0.608^**	0.242^**	0.592^**	-0.539^**	0.647^**	0.152^**	0.202^**	-0.145
日间 Daytime	Sf	0.465^**	-0.430^**	0.159	0.445^**	-0.135	0.439^**	-0.155	0.258^*	-0.122
夜间 Night	Sf	0.012	0.226^*	0.070	0.346^**	-0.160	-0.206	-0.052	0.264^*	0.042

Fig. 7 Daily dynamic curve of Magnolia sap flow rate and main influencing factors

Table 2 Multivariate linear regression model of Magnolia sap flow rate in three periods

时段 Period	回归 Multiple linear regression model	拟合优度R²
全天 Whole day	$F s = 0.394 T a - 0.136 R H + 0.001 R s - 0.002 C O 2 - 3.061 V P D + 4.391$	0.674
日间 Day	$F s = 0.320 T a - 0.142 R H + 0.001 R s - 3.015 V P D + 6.160$	0.556
夜间 Night	$F s = 0.014 R H + 0.009 R s + 0.025 S h - 1.830$	0.349

Table 2 Multivariate linear regression model of Magnolia sap flow rate in three periods

时段 Period	回归 Multiple linear regression model	拟合优度R²
全天 Whole day	$F s = 0.394 T a - 0.136 R H + 0.001 R s - 0.002 C O 2 - 3.061 V P D + 4.391$	0.674
日间 Day	$F s = 0.320 T a - 0.142 R H + 0.001 R s - 3.015 V P D + 6.160$	0.556
夜间 Night	$F s = 0.014 R H + 0.009 R s + 0.025 S h - 1.830$	0.349

References 32

1	马鑫,秦富仓,李龙,等.黄土丘陵区山杏人工林蒸腾速率与环境因子的关系[J].中国农业科技导报,2020,160(12):146-154.
	MA X, QIN F C, LI L, et al.. Relationship between transpiration rate of Armeniaca sibirica plantation and environmental factors in loess hill district [J]. J. Agric. Sci. Tecnhol., 2020,160(12):146-154.
2	DALEY M J, PHILLIPS N G. Interspecific variation in nighttime transpiration and stomatal conductance in a mixed New England deciduous forest [J]. Tree Physiol., 2006,26(4): 411-419.
3	尹立河,黄金廷,王晓勇,等.陕西榆林地区旱柳和小叶杨夜间树干液流变化特征分析[J].西北农林科技大学学报(自然科学版), 2013,41(8): 85-90.
	YIN L H, HUANG J T, WANG X Y, et al.. Characteristics of night time sap flow of Salix matsudana and Populus simonii in Yulin,Shaanxi [J]. J. Northwest A&F Univ. (Nat. Sci.), 2013,41(8): 85-90.
4	豆胜, 马成仓, 陈登科. 4种常见双子叶植物蒸腾作用与叶温关系的研究[J]. 天津师范大学报(自然科学版), 2008(2): 11-13.
	DOU S, MA C C, CHEN D K. On the relationship between the transpiration rate and the leaf temperature of four dicotyledon plants [J]. J. Tianjin Norm. Univ. (Nat. Sci.), 2008(2): 11-13.
5	MCDONALD E P, ERICKSON J E, KRUGER E L. Research note: Can decreased transpiration limit plant nitrogen acquisiton in elevated CO₂ [J]. Funct. Plant Biol., 2002,29(9): 1115-1120.
6	WULLSCHLEGER S D, MEINZER F C, VERTESSY R A. A review of whole-plant water use studies in tree [J]. Tree Physiol., 1998,18(8-9): 499-512.
7	WULLSCHLEGER S D, NORBY R. Sap velocity and canopy transpiration in a sweetgum stand exposed to free-air CO₂ enrichment (FACE) [J]. New Phytol., 2001,150(2): 489-498.
8	王志超,许宇星,竹万宽,等.雷州半岛尾叶桉和湿加松人工林的蒸腾耗水规律[J].生态学报, 2019,39(6): 2147-2155.
	WANG Z C, XU Y X, ZHU W K, et al.. The transpiration water consumption of two common fast-growing forests in Leizhou Peninsula [J]. Acta Ecol. Sin., 2019,39(6): 2147-2155.
9	徐利岗,苗正伟,杜历,等.干旱区枸杞树干液流变化特征及其影响因素[J].生态学报, 2016,36(17): 5519-5527.
	XU L G, MIAO Z W, DU L, et al.. Analysis of variation in and factors influencing sap flow in stems of Lycium barbarum in an arid area [J]. Acta Ecol. Sin., 2016,36(17): 5519-5527.
10	贾天宇,刘廷玺,段利民,等.半干旱沙丘草甸过渡带人工杨树蒸腾耗水规律[J].生态学杂志, 2020,39(10): 3255-3264.
	JIA T X, LIU T X, DUAN L M, et al.. Transpiration and water consumption of poplar trees in semi-arid dune meadow transition zone [J]. Chin. J. Ecol., 2020,39(10): 3255-3264.
11	杜峰,梁宗锁,山仑,等.利用称重法测定植物群落蒸散[J].西北植物学报,2003,23(8): 1411-1415.
	DU F, LIANG Z S, SHAN L, et al.. Evapotranspiration measurements of community using weighting using weighting method [J]. Acta Bot. Boreal-Occident. Sin., 2003,23(8): 1411-1415.
12	李广德,贾黎明,富丰珍.不同方法测定三倍体毛白杨整树蒸腾的比较[J].林业科技开发, 2014,28(5): 41-44.
	LI G D, JIA L M, FU F Z. Comparison on the whole-tree water use of hybrid triploid of Chinese white poplar between the whole tree potometer and thermal dissipation probe [J]. Appl. Res., 2014,28(5): 41-44.
13	MARSHALL D C. Measurement of sap flow in conifers by heat transport [J]. Plant Physiol., 1958,33(6): 385-396.
14	李海涛,陈灵芝.应用热脉冲技术对棘皮桦和五角枫树干液流的研究[J].北京林业大学学报, 1998,20(1): 4-9.
	LI H T, CHEN L Z. A study on the volume and velocity of stem-sapflow of Betulad ahurica and Acer mono forests by the heat-pulse technique [J]. J. Beijing Forestry Univ., 1998,20(1): 4-9.
15	金红喜,刘左军,王继和,等.热平衡茎流计在荒漠灌木植物耗水研究中的应用[J].防护林科技, 2004(6): 9-13.
	JIN H X, LIU Z J, WANG J H, et al.. Messurement of shrub’s water consumption with stem heat balance (SHB) in the desert and arid area [J]. Protection Forest Sci. Technol., 2004(6): 9-13.
16	严昌荣, DOWNEY A, 韩兴国, 等. 北京山区落叶阔叶林中核桃楸在生长中期的树干液流研究[J].生态学报, 1999,19(6): 793-797.
	YAN C R, DOWNEY A, HAN X G, et al.. A study on sap flow of Juglans mandshurica of growth season in deciduous broad-leaf forest Beijing Mountain area [J]. Acta Ecol. Sin., 1999,19(6): 793-797.
17	GRANIER A. A new method of sap flow measurement in tree stems [J]. Ann. Des. Sci. Forestieres, 1985,42(2): 193-200.
18	有祥亮,张冬梅,张浪,等.基于树干茎流速率变化的白玉兰大树栽植养护技术研究[J].园林, 2021,38(7): 96-103.
	YOU X L, ZHANG D M, ZHANG L, et al.. Study on the cultivation and maintenance technology of Yulania denudata based on the variation of stem flow rate [J]. Gardens, 2021,38(7): 96-103.
19	赵春彦,司建华,冯起,等.树干液流研究进展与展望[J].西北林学院学报, 2015,30(5): 98-105.
	ZHAO C Y, SI J H, FENG Q, et al.. Stem sap flow reserach: progress and prospect [J]. J. Northwest Forestry Univ., 2015,30(5): 98-105.
20	涂洁,胡良,刘琪璟,等.江西千烟洲杉木生长季树干液流特征及影响因子[J].浙江农林大学学报, 2015,32(2): 257-263.
	XU J, HU L, LIU Q J, et al.. Sap flow characteristic during the growing season for Cunninghamia lanceolata in red soil areas of Jiangxi Province [J]. J. Zhejiang A&F Univ., 2015,32(2): 257-263.
21	刘崴,魏天兴,朱清科.半干旱黄土丘陵区河北杨和油松生长季树干液流特征[J].浙江农林大学学报, 2018,35(6): 1045-1053.
	LIU W, WEI T X, ZHU Q K. Growing season sap flow of Populus hopeiensis and Pinus tabulaeformis in the semi-arid loess plateau, China [J]. J. Zhejiang A&F Univ., 2018,35(6): 1045-1053.
22	EDWARDS W, BOOKER R E. Radial variation in the axial conductivity of populus and its significance in heat pulse velocity measurement [J]. J. Exp. Bot., 1984,35(153): 551-561.
23	孙慧珍,李海朝.梨园不同尺度耗水量对比研究[J].生态学杂志, 2009,28(4): 768-770.
	SUN H Z, LI H C. Comparison of water conumption in a pearorchard estimated by heatpulse method and infrared gas analyzer [J]. Chin. J. Ecol., 2009,28(4): 768-770.
24	GRANIER A. Evaluation of transpiration in a douglas-fir stand by means of sap flow measurements [J]. Tree Physiol., 1987,3(4): 309-320.
25	李浩,胡顺军,朱海,等.基于热扩散技术的梭梭树干液流特征研究[J].生态学报, 2017,37(21): 7187-7196.
	LI H, HU S J, ZHU H, et al.. Characterization of stem sapflow Haloxylon ammodendron by using thermal dissipation technology [J]. Acta Ecol. Sin., 2017,37(21): 7187-7196.
26	ALDUCHOV O A, ESKRIDGE R E. Improved magnus form approximation of saturation vapor pressure [J]. J. Appl. Meteorol., 1996, 35(4): 601-609.
27	孟秦倩,王健,张青峰,等.黄土山地苹果树树体不同方位液流速率分析[J].生态学报, 2013,33(11): 3555-3561.
	MENG Q Q, WANG J, ZHANG Q F, et al.. Directional flow rate determination in trunks of apple trees in China’s Loess Mountain [J]. Acta Ecol. Sin., 2013,33(11): 3555-3561.
28	蒋文伟,郭运雪,杨淑贞,等.天目山柳杉古树的树干液流速率时空变化[J].浙江农林大学学报, 2012,29(6): 859-866.
	JIANG W W, GUO Y X, YANG S Z, et al.. Temporal and spatial changes for sap flow velocity of Cryptomeria fortunei stems in national nature reserve of Mount Tianmu [J]. J. Zhejiang A&F Univ., 2012,29(6): 859-866.
29	李波,郑思宇,魏新光,等.东北寒区日光温室葡萄液流特征及其主要环境影响因子研究[J]. 农业工程学报, 2019,35(4): 185-193.
	LI B, ZHENG S Y, WEI X G, et al.. Study on sap flow characteristics of grape and it’s environment influencing factors in cold regions of northeastern China [J]. Trans. Chin. Soc. Agric. Eng., 2019,35(4): 185-193.
30	李广德,张亚雄,邓坦,等.树干液流及其主要影响因子对摘芽强度的响应[J].农业工程学报, 2021,37(5): 131-139.
	LI G D, ZHANG Y X, DENG D, et al.. Responses of tree stem sap flow and it's main influencing factors to bud pruning [J]. Trans. Chin. Soc. Agric. Eng., 2021,37(5): 131-139.
31	黄雅茹,李永华,辛智鸣,等.乌兰布和沙漠人工梭梭夏季茎干液流变化特征及其与气象因子的关系[J].中国农业科技导报, 2020,22(7): 155-165.
	HUANG Y R, LI Y H, XIN Z M, et al.. Sap flow variation characteristics and it’s relationship with meteorological factors of artificial Haloxylon ammodendron (C. A. Mey.) Bunge in summer in Ulan Buh desert [J]. J. Agric. Sci. Technol., 2020,22(7):155-165.
32	王檬檬,党宏忠,李钢铁,等. 晋西黄土区苹果树液流特征及其与环境因子的关系[J].中国农业科技导报,2020,22(7): 140-147.
	WANG M M, DANG H Z, LI G T, et al.. Sap flux density characteristics of apple orchards and their relationship with environmental factors in gully region of loess plateau [J]. J. Agric. Sci. Technol., 2020,22(7): 140-147.

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