Water Consumption by Transpiration of Landscape Trees in Beijing

LU Shao-wei; DING Jie; LI Shao-ning; YANG Chao; CHEN Bo; LU Sen

doi:10.19303/j.issn.1008-0384.2017.07.010

Volume 32 Issue 7

Oct. 2017

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LU Shao-wei, DING Jie, LI Shao-ning, YANG Chao, CHEN Bo, LU Sen. Water Consumption by Transpiration of Landscape Trees in Beijing[J]. Fujian Journal of Agricultural Sciences, 2017, 32(7): 739-745. doi: 10.19303/j.issn.1008-0384.2017.07.010

Citation:

LU Shao-wei, DING Jie, LI Shao-ning, YANG Chao, CHEN Bo, LU Sen. Water Consumption by Transpiration of Landscape Trees in Beijing[J]. Fujian Journal of Agricultural Sciences, 2017, 32(7): 739-745. doi: 10.19303/j.issn.1008-0384.2017.07.010

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Water Consumption by Transpiration of Landscape Trees in Beijing

doi: 10.19303/j.issn.1008-0384.2017.07.010

LU Shao-wei^{1, 2, 3
,},
DING Jie⁴,
LI Shao-ning^{1, 2, 3
,
,},
YANG Chao⁴,
CHEN Bo^{1, 2, 3},
LU Sen⁵

1.
Forestry and Pomology Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China
2.
Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees, Beijing 100093, China
3.
Beijing Yanshan Forest Ecosystem Research Station, Beijing 100093, China
4.
College of Forestry, Hebei Agricultural University, Baoding, Hebei 071000, China
5.
Flowers Management Center of Hebei, Shijiazhuang, Hebei 050051, China

Received Date: 2017-03-18
Rev Recd Date: 2017-05-04
Publish Date: 2017-07-01

Abstract

Abstract

A pot experiment was conducted to study the photosynthesis and the transpiration of 5 landscape trees commonly found in Beijing, Pinus bungeana, Fraxinus chinensis, Ginkgo biloba, Prunus davidiana, and Lycium chincnse. The results showed that, with ample supply of water, the rates of photosynthesis (Pn), transpiration (Tr), and stomatal conductance (Gs) on leaves of the nursery stocks in a day consistently changed in an M-shape curve with a "lunch break" at noon time. The changes on vapor pressure deficit (VPD) exhibited a single peak curve. Tr linearly correlated with Gs as well as VPD. The correlation coefficient (R²) between Tr and Gs of P. bungeana was 0.9795; and, that between Tr and VPD, 0.9884. Tr of the 5 species ranked L. chincnse (3.33 mmol·m^-2·s^-1) > F. chinensis (3.22 mmol·m^-2·s^-1) > P. davidiana (3.22 mmol·m^-2·s^-1)=G. biloba (3.21 mmol·m^-2·s^-1) > P. bungeana (2.21 mmol·m^-2·s^-1). The water consumptions for the trees were L. chincnse (0.090 g·cm^-2·d^-1) > F.chinensis (0.080 g·cm^-2·d^-1) > Prunus davidiana (0.076 g·cm^-2·d^-1)=G. biloba (0.076 g·cm^-2·d^-1)>P. bungeana (0.032 g·cm^-2·d^-1). The monthly water consumptions of F. chinensis and G. biloba exhibited in a V-shape curve; while, P. bungeana, P. davidiana and L. chincnse, an M-shape curve with twin peaks. Seasonally, the water consumptions of the trees decrease in the order of July (0.083 g·cm^-2·d^-1) > September (0.078 g·cm^-2·d^-1) > August (0.075 g·cm^-2·d^-1) > June (0.071 g·cm^-2·d^-1) > October (0.060 g·cm^-2·d^-1) > May (0.057 g·cm^-2·d^-1). And, P. bungeana consumed the greatest amount of water in autumn, while others in summer. On draught resistance, P. davidiana and G. biloba were more tolerant to the stress than L. chincnse, F. chinensis or P. bungeana.
- landscape trees,
- transpiration,
- water consumption,
- Beijing

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References(17)

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