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Frontiers of Agricultural Science and Engineering

ISSN 2095-7505

ISSN 2095-977X(Online)

CN 10-1204/S

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Front. Agr. Sci. Eng.    2020, Vol. 7 Issue (4) : 490-504    https://doi.org/10.15302/J-FASE-2019310
RESEARCH ARTICLE
Comparison of evapotranspiration and energy partitioning related to main biotic and abiotic controllers in vineyards using different irrigation methods
Lei GAO1,2, Peng ZHAO1,2, Shaozhong KANG1,2(), Sien LI1,2, Ling TONG1,2, Risheng DING1,2, Hongna LU1,2
1. Center for Agricultural Water Research in China, China Agricultural University, Beijing 100083, China
2. Wuwei Experimental Station for Efficient Water Use in Agriculture, Ministry of Agriculture and Rural Affairs, Wuwei 733000, China
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Abstract

Knowledge of evapotranspiration (ET) and energy partitioning is useful for optimizing water management, especially in areas where water is scarce. A study was undertaken in a furrow-irrigated vineyard (2015) and a drip-irrigated vineyard (2017) in an arid region of north-west China to compare vineyard ET and energy partitioning and their responses to soil water content (SWC) and leaf area index (LAI). ET and soil evaporation (E) and transpiration (T) were determined using eddy covariance, microlysimeters, and sap flow. Seasonal average E/ET, T/ET, crop coefficient (Kc), evaporation coefficient (Ke), and basal crop coefficient (Kcb) were 0.50, 0.50, 0.67, 0.35, and 0.29, respectively, in the furrow-irrigated vineyard and 0.42, 0.58, 0.57, 0.29, and 0.43 in the drip-irrigated vineyard. The seasonal average partitioning of net radiation (Rn) into the latent heat flux (LE), sensible heat flux (H) and soil heat flux (G) (LE/Rn, H/Rn, and G/Rn), evaporative fraction (EF) and Bowen ratio (β) were 0.57, 0.26, 0.17, 0.69 and 0.63, respectively, in the furrow-irrigated vineyard and 0.46, 0.36, 0.17, 0.57 and 0.97 in the drip-irrigated vineyard. The LE/Rn, H/Rn, EF, and β were linearly correlated with LAI. The E, Kc, Ke, E/ET, LE/Rn, LEs/Rn (ratio of LE by soil E to Rn), H/Rn, EF and β were closely correlated with topsoil SWC (10 cm depth). Responses of ET and energy partitioning to the LAI and SWC differed under the two irrigation methods. Drip irrigation reduced seasonal average E/ET and increased average T/ET. From the perspective of energy partitioning, seasonal average H/Rn increased whereas LE/Rn, especially LEs/Rn, decreased. Compared with furrow irrigation, drip irrigation decreased the proportion of unproductive water consumption thereby contributing to enhanced water use efficiency and accumulation of dry matter.

Keywords crop coefficient      eddy covariance      microlysimeter      sap flow      soil evaporation      transpiration     
Corresponding Author(s): Shaozhong KANG   
Just Accepted Date: 25 February 2020   Online First Date: 13 April 2020    Issue Date: 06 November 2020
 Cite this article:   
Lei GAO,Peng ZHAO,Shaozhong KANG, et al. Comparison of evapotranspiration and energy partitioning related to main biotic and abiotic controllers in vineyards using different irrigation methods[J]. Front. Agr. Sci. Eng. , 2020, 7(4): 490-504.
 URL:  
https://academic.hep.com.cn/fase/EN/10.15302/J-FASE-2019310
https://academic.hep.com.cn/fase/EN/Y2020/V7/I4/490
Year Month Ta/ºC Rs/(MJ·m–2·d–1) VPD/kPa P/mm SWC/(m3·m–3) LAI/(m2·m–2)
2015 Late Apr.–May 16.58 20.42 1.38 5.10 0.13 0.31
Jun. 19.27 19.84 1.17 43.00 0.15 1.53
Jul. 21.02 21.18 1.22 53.40 0.15 2.05
Aug. 20.25 19.66 1.30 8.60 0.11 1.55
Sep. 14.52 14.07 0.71 36.40 0.14 1.43
Late Apr.–Sep. 18.24 19.14 1.17 161.80 0.14 1.31
2017 Late Apr.–May 17.05 21.11 1.38 3.06 0.13 0.40
Jun. 20.20 21.24 1.38 21.80 0.13 1.06
Jul. 22.87 20.50 1.40 39.60 0.14 1.07
Aug. 20.62 17.39 0.99 44.40 0.17 1.19
Sep. 17.84 15.49 1.05 6.20 0.12 0.97
  Late Apr.–Sep. 19.67 19.19 1.24 133.40 0.14 0.93
Tab.1  Monthly mean air temperature (Ta), solar radiation (Rs), vapor pressure deficit (VPD), monthly total precipitation (P), soil water content (SWC, 10 cm depth), and leaf area index (LAI) in the furrow-irrigated vineyard studied in 2015 and the drip-irrigated vineyard studied in 2017
Fig.1  Seasonal variation in daily (a, b) mean air temperature (Ta), (c, d) mean solar radiation (Rs), (e, f) mean vapor pressure deficit (VPD), and (g, h) total precipitation (P) in the furrow-irrigated vineyard studied in 2015 (left) and the drip-irrigated vineyard studied in 2017 (right).
Fig.2  Seasonal variation in daily evapotranspiration (ET) measured by eddy covariance and reference evapotranspiration (ETo) in the furrow-irrigated vineyard studied in 2015 (left) and the drip-irrigated vineyard studied in 2017 (right). Leaf area index (LAI), irrigation (I) and precipitation (P) are shown.
Year Month ETo/(mm·d–1) ET/(mm·d–1) E/(mm·d–1) T/(mm·d–1) E/ET T/ET Kc Ke Kcb
2015 Late Apr.–May 4.23 1.42 0.96 0.53 0.56 0.44 0.34 0.21 0.15
Jun. 3.97 2.94 1.62 1.19 0.50 0.50 0.74 0.38 0.31
Jul. 4.16 3.96 2.07 1.59 0.49 0.51 0.92 0.47 0.38
Aug. 3.73 2.33 0.71 1.30 0.31 0.69 0.62 0.20 0.34
Sep. 2.46 2.08 1.26 0.74 0.62 0.38 0.82 0.51 0.28
Late Apr.–Sep. 3.75 2.48 1.30 1.04 0.50 0.50 0.67 0.35 0.29
2017 Late Apr.–May 4.58 1.30 0.99 0.55 0.49 0.51 0.30 0.22 0.28
Jun. 4.31 2.47 1.07 1.58 0.41 0.59 0.57 0.25 0.36
Jul. 4.34 2.77 0.98 1.52 0.31 0.69 0.57 0.20 0.35
Aug. 3.42 3.14 1.66 1.79 0.50 0.50 0.89 0.48 0.55
Sep. 2.80 1.60 0.61 1.43 0.45 0.55 0.55 0.26 0.54
  Late Apr.–Sep. 3.91 2.23 1.06 1.36 0.42 0.58 0.57 0.29 0.43
Tab.2  Monthly mean values of reference evapotranspiration (ETo), evapotranspiration (ET), evaporation (E), transpiration (T), E/ET, T/ET, crop coefficient (Kc), soil evaporation coefficient (Ke), and basal crop coefficient (Kcb) during the growing season in the furrow-irrigated vineyard studied in 2015 and the drip-irrigated vineyard studied in 2017
Fig.3  Seasonal variation in daily evapotranspiration (ET) partitioning (E/ET, T/ET) in the furrow-irrigated vineyard studied in 2015 (upper) and the drip-irrigated vineyard studied in 2017 (lower). E/ET, the ratio of soil evaporation (E) to ET; and T/ET, the ratio of transpiration (T) to ET.
Fig.4  Relationships between (a) E/ET and (b) E and relative soil water content (RSWC, 10 cm depth) in the furrow-irrigated vineyard studied in 2015 and the drip-irrigated vineyard studied in 2017. E, evaporation; and ET, evapotranspiration. ***, P<0.001.
Fig.5  Seasonal variation in daily (a, b) crop coefficient (Kc), (c, d) evaporation coefficient (Ke) and topsoil soil water content (SWC, 10 cm depth), (e, f) basal crop coefficient (Kcb) in the furrow-irrigated vineyard studied in 2015 (left) and the drip-irrigated vineyard studied in 2017 (right).
Fig.6  Relationships between (a) daily crop coefficient (Kc) and (b) evaporation coefficient (Ke) and relative soil water content (RSWC, 10 cm depth) in the furrow-irrigated vineyard studied in 2015 and the drip-irrigated vineyard studied in 2017. ***, P<0.001.
Fig.7  Seasonal variation in the proportional daily energy partitioning H/Rn, LE/Rn, G/Rn, EF, and b in the furrow-irrigated vineyard studied in 2015 (left) and the drip-irrigated vineyard studied in 2017 (right). LE/Rn, H/Rn, and G/Rn are the partitioning of net radiation (Rn) into latent heat flux (LE), sensible heat flux (H) and soil heat flux (G). EF, evaporative coefficient; and b, Bowen ratio.
Year Month Rn/(MJ·m–2·d–1) LE/(MJ·m–2·d–1) H/(MJ·m–2·d–1) G/(MJ·m–2·d–1) H/Rn LE/Rn G/Rn EF β
2015 Late Apr.–May 8.75 3.19 3.55 2.02 0.41 0.35 0.23 0.45 1.49
Jun. 10.25 6.65 2.10 1.51 0.20 0.65 0.15 0.76 0.34
Jul. 11.50 8.96 1.28 1.26 0.13 0.75 0.12 0.84 0.21
Aug. 9.23 5.28 2.40 1.55 0.27 0.55 0.18 0.69 0.52
Sep. 6.34 4.69 1.26 0.39 0.20 0.68 0.12 0.79 0.30
Late Apr.–Sep. 9.20 5.60 2.21 1.39 0.26 0.57 0.17 0.69 0.63
2017 Late Apr.–May 8.74 3.03 5.68 0.04 0.59 0.29 0.11 0.35 2.23
Jun. 10.12 5.54 3.40 1.19 0.32 0.51 0.17 0.64 0.62
Jul. 10.10 5.61 3.00 1.49 0.31 0.45 0.25 0.57 0.90
Aug. 9.14 7.11 1.25 0.78 0.16 0.64 0.20 0.81 0.26
Sep. 6.88 3.42 2.79 0.67 0.39 0.46 0.15 0.57 0.84
  Late Apr.–Sep. 9.00 4.91 3.27 0.81 0.36 0.46 0.17 0.57 0.97
Tab.3  Monthly mean energy fluxes of net radiation (Rn), latent heat flux (LE), sensible heat flux (H), and soil heat flux (G), proportional energy partitioning H/Rn, LE/Rn, G/Rn, evaporative fraction (EF) and Bowen ratio (β) in the furrow-irrigated vineyard studied in 2015 and the drip-irrigated vineyard studied in 2017
Fig.8  Relationships between proportional daily energy partitioning LE/Rn, H/Rn, EF, β and relative leaf area index (RLAI) in the furrow-irrigated vineyard studied in 2015 and the drip-irrigated vineyard studied in 2017. LE/Rn and H/Rn are the partitioning of net radiation (Rn) into latent heat flux (LE) and sensible heat flux (H). EF, evaporative coefficient; and β, Bowen ratio. ***, P<0.001.
Fig.9  Relationships between proportional daily energy partitioning LEs/Rn, LE/Rn, H/Rn, EF, b and relative soil water content (RSWC, 10 cm depth) in the furrow-irrigated vineyard studied in 2015 and the drip-irrigated vineyard studied in 2017. LEs/Rn, LE/Rn, and H/Rn are the partitioning of net radiation (Rn) into the latent heat flux by soil evaporation (LEs), latent heat flux (LE) and sensible heat flux (H). EF, evaporative coefficient; and b, Bowen ratio. ***, P<0.001.
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