scholarly journals Assessing water requirement of orange trees using sap flow measurements in Narkhed-Pandhurna critical zone observatory (CZO) in central India

2021 ◽  
Vol 23 (1) ◽  
pp. 14-20
Author(s):  
ASHUTOSH KUMAR MISHRA ◽  
PARAS R. PUJARI ◽  
SHALINI DHYANI ◽  
PARIKSHIT VERMA ◽  
RAMESH JANIPELLA ◽  
...  
Keyword(s):  
Water Uptake ◽  
Sap Flow ◽  
Short Interval ◽  
Central India ◽  
Water Requirement ◽  
Thermal Dissipation ◽  
Sap Flux ◽  
Flow Measurements ◽  
Sap Flow Measurements ◽  
Orange Trees

We used thermal dissipation method for sap flux measurements in orange trees to assess its water requirement in Narkhed-Pandhurna region. Thermal Dissipation Probe (TDP) sensors were installed in 5-year old (young) and 15-year old (mature) orange trees to measure the diurnal sap flux variations in trees during November 21, 2019, to January 31, 2020 (71 days). The results show that the maximum daily water uptake by the 5-year old tree was 1.1 L observed on 39th day of measurement (December 29, 2019) and in the 15-year old tree it was 5.0 L, and it observed on 38th day (December 28, 2019) of measurement. The cumulative water uptake during the study period by the 5-year old tree was 49.0 L, and the 15-year old tree consumed 257.4 L of water. The results were compared with the recommended irrigational values of Indian Horticulture Board (IHB), Government of India (GoI) and Groundwater Survey and Development Agency (GSDA), Government of Maharashtra (GoMH) for orange orchards. The initial investigation shows that recommended guidelines for irrigation of orange trees are exorbitantly high and needs to be revised. The sap flow methods are more precise that can measure sap flow at a very short interval and can generate a time series of data. It can be used to revise the guidelines with the aim to conserve water and propose precision water irrigation for the study area in particular and different agro-climatic zones of the country in general.

Determination of zero-flow for the thermal dissipation method of sap flow measurements in Mediterranean climates

2020 ◽  
pp. 29-36
Author(s):  
S. Haberstroh ◽  
M.C. Caldeira ◽  
R. Lobo-do-Vale ◽  
M. Dubbert ◽  
C. Werner
Keyword(s):  
Sap Flow ◽  
Thermal Dissipation ◽  
Flow Measurements ◽  
Sap Flow Measurements ◽  
Zero Flow

Modeling of plant water uptake in two distinct forest stands using whole-plant capacitance approach

2021 ◽  
Author(s):  
Veronika Skalova ◽  
Michal Dohnal ◽  
Jana Votrubova ◽  
Tomas Vogel ◽  
Miroslav Tesar
Keyword(s):  
Soil Water ◽  
Water Uptake ◽  
Sap Flow ◽  
Meteorological Data ◽  
Water Pressure ◽  
Thermal Dissipation ◽  
Richards Equation ◽  
Soil Drought ◽  
Flow Measurements ◽  
Whole Plant

<p>Soil-plant-atmosphere interactions are studied to improve the estimation of actual transpiration – the key part of the catchment water balance. The one-dimensional soil water flow model S1D, involving vertically distributed macroscopic root water uptake and whole-plant hydraulic capacitance, was used. The model is based on the numerical solution of Richards' equation coupled with a transient transpiration stream algorithm.</p><p>The study focuses on the catchment Liz located in the Bohemian Forest, Czech Republic. The catchment is covered with Norway spruce (Picea abies) and European beech (Fagus sylvatica). In 2020, sap flow measurements by thermal dissipation probes were conducted at both forest environments. Soil water pressure head, soil water content, and soil temperature data, as well as complete meteorological data from the nearby meteorological station, were also available for the whole period of interest.</p><p>The registered sap flow and simulated transpiration fluxes are compared with a particular attention to the different behavior of isohydric (spruce) and anisohydric (beech) trees. The model reasonably well reproduces the plant responses caused by both the high midday potential transpiration demand and the occasional soil drought.</p><p>The research is supported by the Czech Science Foundation Project No. 20-00788S.</p>

Examination and parameterization of the root water uptake model from stem water potential and sap flow measurements

2012 ◽  
pp. n/a-n/a ◽  
Author(s):  
Yuting Yang ◽  
Huade Guan ◽  
John L. Hutson ◽  
Hailong Wang ◽  
Caecilia Ewenz ◽  
...  
Keyword(s):  
Water Potential ◽  
Water Uptake ◽  
Sap Flow ◽  
Root Water Uptake ◽  
Stem Water Potential ◽  
Flow Measurements ◽  
Stem Water ◽  
Sap Flow Measurements

scholarly journals CO<sup>2</sup> uptake of a mature <i>Acacia mangium</i> plantation estimated from sap flow measurements and stable carbon isotope discrimination

2014 ◽  
Vol 11 (5) ◽  
pp. 1393-1411 ◽  
Author(s):  
H. Wang ◽  
P. Zhao ◽  
L. L. Zou ◽  
H. R. McCarthy ◽  
X. P. Zeng ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Carbon Isotope ◽  
Sap Flow ◽  
Carbon Isotope Discrimination ◽  
Stable Carbon Isotope ◽  
Co2 Uptake ◽  
Sap Flux ◽  
Stable Carbon ◽  
Flow Measurements ◽  
Sap Flow Measurements

Abstract. A simple, nondestructive method for the estimation of canopy CO2 uptake is important for understanding the CO2 exchange between forest and atmosphere. Canopy CO2 uptake (FCO2) of a subtropical mature \\textit{A. mangium} plantation was estimated by combining sap flow measurements and stable carbon isotope discrimination (Δ) in Southern China from 2004 to 2007. The mechanistic relationship linking FCO2, Δ in leaf sap, and sap flow-based canopy stomatal conductance (Gs) was applied in our study. No significant seasonal variations were observed in Δ or in the ratio of the intercellular and ambient CO2 concentrations (Ci/Ca), although diurnal Ci/Ca varied between sunlit and shaded leaves. A sensitivity analysis showed that estimates of FCO2 were more sensitive to dynamics in Gs than in Ca and Δ. By using seasonally and canopy averaged Ci/Ca values, we obtained an acceptable estimate of FCO2 compared to other estimates. FCO2 exhibited similar diurnal variation to that of Gs. Large seasonal variation in FCO2 was attributed to the responsiveness of Gs to vapor pressure deficit, photosynthetically active radiation, and soil moisture deficit. Our estimate of FCO2 for a mature A. mangium plantation (2.13 ± 0.40 gC m−2 d−1) approached the lower range of values for subtropical mixed forests, probably due to lower mean canopy stomatal conductance, higher Ci/Ca, and greater tree height than other measured forests. Our estimate was also lower than values determined by satellite-based modeling or carbon allocation studies, suggesting the necessity of stand level flux data for verification. Qualitatively, the sap flux/stable isotope results compared well with gas exchange results. Differences in results between the two approaches likely reflected variability due to leaf position and age, which should be reduced for the combined sap flux and isotope technique, as it uses canopy average values of Gs and Ci/Ca.

scholarly journals CO<sub>2</sub> uptake of a mature <i>Acacia mangium</i> plantation estimated from sap flow measurements and stable carbon isotope discrimination

2013 ◽  
Vol 10 (7) ◽  
pp. 11583-11625 ◽  
Author(s):  
H. Wang ◽  
P. Zhao ◽  
L. L. Zou ◽  
H. R. McCarthy ◽  
X. P. Zeng ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Stable Isotope ◽  
Carbon Isotope ◽  
Sap Flow ◽  
Carbon Isotope Discrimination ◽  
Stable Carbon Isotope ◽  
Sap Flux ◽  
Stable Carbon ◽  
Flow Measurements ◽  
Sap Flow Measurements

Abstract. Canopy CO2 uptake (FCO2) of a subtropical mature \\textit{A. mangium} plantation was estimated by combining sap flow measurements and stable carbon isotope discrimination (Δ) in Southern China from 2004 to 2007. The mechanistic relationship linking FCO2, Δ in leaf sap, and sap flow based canopy stomatal conductance (Gs) was applied in our study. No significant seasonal variations were observed in Δ or in the ratio of the intercellular and ambient CO2 concentrations (Ci/Ca), although diurnal Ci/Ca varied between sunlit and shaded leaves. A sensitivity analysis showed that estimates of FCO2 were more sensitive to dynamics in Gs than in Ca and Δ. By using seasonally and canopy averaged Ci/Ca values, an acceptable estimate of FCO2 was obtained. FCO2 exhibited similar diurnal variation to that of Gs. Large seasonal variation in FCO2 was attributed to the responsiveness of Gs to vapour pressure deficit, photosynthetically active radiation, and soil moisture deficit. Our estimate of FCO2 for a mature A. mangium plantation (2.13 ± 0.40 g C m−2 day−1) approached the lower range of values for subtropical mixed forest, probably due to lower mean canopy stomatal conductance, higher Ci/Ca, and greater tree height than other measured forests. Our estimate was also lower than values determined by satellite-based modeling or component carbon analysis, suggesting the necessity of stand level flux data for verification. Qualitatively, the sap flux/stable isotope results compared well with gas exchange results. Differences in results between the two approaches reflected variability due to leaf position and age, which could be reduced for sap flux/stable isotope, which uses canopy average values of Gs and Ci/Ca.

scholarly journals Sap flow in ‘Tommy Atkins’ mango trees under regulated deficit irrigation

2019 ◽  
Vol 14 (3) ◽  
pp. 1
Author(s):  
Carlos Elizio Cotrim ◽  
Marcelo Rocha dos Santos ◽  
Maurício Antônio Coelho Filho ◽  
Eugênio Ferreira Coelho ◽  
João Abel da Silva
Keyword(s):  
Sap Flow ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Thermal Dissipation ◽  
Phase Iii ◽  
Regulated Deficit Irrigation ◽  
Flow Measurements ◽  
Mango Tree ◽  
Irrigated Perimeter ◽  
Sap Flow Measurements

Knowledge of transpiration is of fundamental importance for improving irrigation management. This study measured sap flow of the 'Tommy Atkins' mango tree using Granier’s thermal dissipation probe method under regulated deficit irrigation. The work was conducted in a 10-year-old ‘Tommy Atkins’ mango orchard, irrigated by micro sprinkler, located in the Irrigated Perimeter of Ceraíma, in Guanambi, Bahia, Brazil. Sap flow measurements were carried out on three consecutive days in plants under regulated deficit irrigation, with reductions of 30 and 60% of crop evapotranspiration in three phases of fruit development; beginning of flowering to early fruit growth (Phase I), fruit expansion (Phase II) and physiological maturation of fruits (Phase III). Regulated deficit irrigation led to reduced sap flow in ‘Tommy Atkins’ mango tree.

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