Water consumption of Populus alba trees in tree shelterbelt systems in Central Asia – a case study in the Chui Valley, South Eastern Kazakhstan

Thevs, Niels; Baibagysov, Azim; Strenge, Eva; Aliev, Kumar; Eraaliev, Maksat; Lang, Petra

doi:10.29258/cajwr/2018-ri.v4-1/48-62.eng

Cited by 7 publications

(10 citation statements)

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“…The values are in the range of daily water consumptions of 4 mm/d and 3.9 mm/d as published by [26] and [27], respectively, both for P. gansuensis in Northwest China. [22] reported daily average water consumptions of P. alba in the Chui Valley in Kazakhstan of 2.6 -4.8 mm/d. Furthermore, [28] reported similar daily water consumptions of 3.6 mm/d in average with a maximum of 4.8 mm/d for P. trichocarpa × deltoides from Washington State, U.S. As the three poplar trees sampled in this study were not surrounded by equally tall trees, their water consumption might be higher compared to a situation in a contiguous plantation, because the trees are exposed to higher wind speed due to the absence of neighboring trees.…”

Section: Discussionmentioning

confidence: 99%

“…These daily sap flow velocities were plotted against daily mean VPD values to establish relationships that allowed to fill data gaps in the sap flow measurements, in particular for the 2018 and 2020 tree rings of paulownia, which had been monitored by sap flow sensors for only short time spans. [22] reports that in Populus alba, VPD exhibited the closest relationship to sap flow compared to other climate features such as temperature, humidity, radiation, or wind speed. The data stems from on a location in Kazakhstan situated between the two sites of this study.…”

Section: Quantifying Sap Flowmentioning

confidence: 99%

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Water Productivity of Poplar and Paulownia on Two Sites in Kyrgyzstan, Central Asia

Thevs¹,

Baier²,

Aliev³

2021

JWARP

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As Central Asia is a region with wide spread water scarcity as a result of excessive irrigation of agriculture, land use changes deserve research about potential impacts on the already strained water resources. Poplars have a long tradition as agroforestry tree across Central Asia, while paulownia is new to the region, but has been gaining extreme attention as a potential plantation and/or agroforestry tree. Therefore, the water productivity of those two tree species is investigated here on 3-year-old trees, in order to provide insights in how far the newly introduced Paulownia could put additional strain on water resources compared to paulownia. Poplar (P. deltoides × nigra) increased the stem biomass by 5.4 kg at an average water consumption of 4.18 l/d (water productivity 6.79 g/l). Paulownia's (Paulownia tomentosa × fortunei) stem biomass grew by 4.81 kg at 2.36 l/d in average (water productivity 11.9 g/l). Expanding paulownia would not exert more pressure on Central Asia's water resources than an expansion of poplar.

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Section: Discussionmentioning

confidence: 99%

Section: Quantifying Sap Flowmentioning

confidence: 99%

Water Productivity of Poplar and Paulownia on Two Sites in Kyrgyzstan, Central Asia

Thevs¹,

Baier²,

Aliev³

2021

JWARP

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“…The water consumption of the tree wind breaks was also included on this model. Tree water consumption was measured through the sapflow method put forth by [23] and as used in [24][25][26][27] for sites covered by this study. The tree water consumption for poplars in a single row wind break was measured in Chek in 2017 [25].…”

Section: Methodsmentioning

confidence: 99%

Tree Wind Breaks in Central Asia and Their Effects on Agricultural Water Consumption

Thevs¹,

Gombert

Strenge

et al. 2019

Land

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Across Central Asia, agriculture largely depends on irrigation due to arid and semi-arid climatic conditions. Water is abstracted from rivers, which are largely fed by glacier melt. In the course of climate change, glaciers melt down so that a reduced glacier volume and reduced water runoffs are expected to be available for irrigation. Tree wind breaks are one option to reduce water consumption in irrigated agriculture and build resilience against climate change. This paper therefore assesses the water consumption of major crops in Kyrgyzstan and adjacent areas, i.e., cotton (Gossypium hirsutum L.), wheat (Triticum aestivum L.), corn (Zea mays L.), rice (Oryza sativa L.), potato (Solanum tuberosum L.), and barley (Hordeum vulgare L.) in combination with tree wind breaks. Crop water consumption was assessed through the Penman Monteith approach. Tree wind break types investigated were single rows from poplars (Populus spec.) and multiple rows with understory vegetation by elm (Ulmus minor L.) and poplar, respectively. Tree water consumption was determined through sapflow measurements. The seasonal reference evapotranspiration (ETo) for field crops was 876–995 mm without wind breaks and dropped to less than half through multiple row wind breaks with understory vegetation (50 m spacing). Tree water consumption was 1125–1558 mm for poplar and 435 mm for elm. Among the wind break crop systems, elm wind breaks resulted in the highest reductions of water consumption, followed by single row poplars, at spacing of 50 and 100 m, respectively. However, elm grows much slower than poplar, so poplars might be more attractive for farmers. Furthermore, single row wind breaks might by much easier to be integrated into the agrarian landscape as they consume less space.

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“…The water consumption of the tree wind breaks was included on this model, too. Tree water consumption was measured after [21] as used in [24,23,25,26] for sites covered by this study. Tree water consumption for poplar in a single row wind break was measured in Chek in 2017 [25].…”

Section: Methodsmentioning

confidence: 99%

“…Tree water consumption for poplar in a single row wind break was measured in Chek in 2017 [25]. Tree water consumption for poplar and elm in a multiple row wind break was measured by [24] and [26] in were grown adjacent to the tree wind break (Fig. 2).…”

Section: Methodsmentioning

confidence: 99%

Tree Wind Breaks in Central Asia and Their Effects on Agricultural Water Consumption

Thevs¹,

Gombert²,

Strenge³

et al. 2019

Preprint

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Across Central Asia, agriculture largely depends on irrigation due to arid and semi-arid climatic conditions. Water is abstracted from rivers, which are largely fed by glacier melt. In the course of climate change, glaciers melt down so that a reduced glacier volume and reduced water runoffs are expected being available for irrigation. Tree wind breaks are one option to reduce water consumption in irrigated agriculture and build resilience against climate change. This paper therefore assessed water consumption of major crops (cotton, wheat, corn, rice, potato, and barley) in Kyrgyzstan and adjacent areas in combination with tree wind breaks. Crop water consumption was assessed through the Penman Monteith approach. Tree wind break types investigated were single rows from poplars and multiple rows with undergrowth by elm and poplar, respectively. Tree water consumption was determined through sapflow measurements. Seasonal ETo for field crops was 876 mm to 995 mm without wind breaks and dropped to less than half through multiple row wind breaks with undergrowth (50 m spacing). Tree water consumption was 1125 mm to 1558 mm for poplar and 435 mm for elm. Among the wind break crop systems, elm wind breaks resulted in highest reductions of water consumption, followed by single row poplars, at spacing of 50 m and 100 m, respectively. Yet, elm grows much slower than poplar so that poplars might be more attractive for farmers. Furthermore, single row wind breaks might by much easier to be integrated into the agrarian landscape, as they consume less space.

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Water consumption of Populus alba trees in tree shelterbelt systems in Central Asia – a case study in the Chui Valley, South Eastern Kazakhstan

Cited by 7 publications

References 0 publications

Water Productivity of Poplar and Paulownia on Two Sites in Kyrgyzstan, Central Asia

Water Productivity of Poplar and Paulownia on Two Sites in Kyrgyzstan, Central Asia

Tree Wind Breaks in Central Asia and Their Effects on Agricultural Water Consumption

Tree Wind Breaks in Central Asia and Their Effects on Agricultural Water Consumption

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