The peculiar Euphrates poplar


Euphrates poplar can sprout seedlings from its roots, can tolerate arid environment in desert, and has strong tolerance to salt and alkali.Bark pale grayish brown, lower frayed;Branches slender, rounded, smooth or slightly villous.Buds elliptic, smooth, brown, ca. 7 mm long.Leaves linear-lanceolate or narrowly lanceolate, entire or irregularly sparsely undulate-dentate margin on long branches and seedlings and saplings;Branchlets of adult trees yellowish mud, with short hairs or glabrous, salty branches, salty bite
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Leaves variously ovoid, ovate-lanceolate, triangular-ovoid, or reniform, 25 cm long, 3 cm wide, apex with 2 to 4 pairs of coarse-dentate teeth, base cuneate, broadly cuneate, rounded or truncate, with 2 glandular spots, both surfaces of the same color;Sparsely subcordate or broadly wedged;Petiole 1 ~ 3 cm long smooth, slightly flat, about as long as leaf blade, petiole very short, only 1 cm long, with short villi or smooth.Leaf edge still has a lot of notch, resemble maple leaf a bit again, leaf leather qualitative change, long hair on the branch, even young leaf is like willow leaf, in order to reduce the evaporation of moisture, reason it has again "change leaf poplar", "different leaf poplar" say
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Dioecious, rhombus;Bracts rhomboid, often serrate, early falling;Male inflorescence fine cylindrical, 2-3 cm long, axis with short villi, stamens 15-25, anthers purplish red, disk membranous, margin with irregular teeth;Bracts slightly rhomboid, ca. 3 mm long, upper teeth sparsely dentate;Female inflorescence ca. 2.5 cm long, fruiting up to 9 cm, rachis short tomentose or glabrous, ovary sessile, stigma broad, purplish red, long ovate, tomentose or glabrous, ovary stipe ca. As long as ovary, stigma 3,2 lobed, bright red or yellowish green.Capsule ovoid, 10-12 mm long, 2-3 lobed, glabrous.Flowering in May, fruit in July - August.
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Euphrates poplar is a kind of tree in arid continental climate.Light, heat resistance, anti - atmospheric drought, anti - salt, anti - sand.Poor growth in hot and humid climates and on sticky soils.Euphrates poplars want sandy soil and follow desert rivers wherever they go.But the change of desert river is quite frequent, so, Euphrates poplar left the trace that once stopped everywhere in the desert.With the support of its roots and a water table no lower than 4 meters underground, Euphrates poplar can live at ease.After the water table drops to 6~9 meters, Euphrates poplar appears to be depressed;Lower the water table, the Euphrates poplar will die.
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Euphrates poplar is a typical Mesozoic to Mesozoic plant in desert areas of Asia and Africa.Strong ability to adapt to large temperature changes, like light, like soil moisture, resistant to atmospheric drought, high temperature, but also more resistant to cold;It is suitable for desert climate in warm temperate zone with accumulated temperature between 2000 ℃ and 4500℃ above 10℃, and grows best on fine sand-sandy soil along desert rivers and floodplain in warm temperate zone with accumulated temperature above 4000℃.Can withstand the extreme maximum temperature 45℃ and extreme minimum temperature -40℃ attack.The salt-alkali tolerance of populus euphratica was strong, and it grew well when the total soil salt content was less than 1% within 1 meter.When the total salt content was 2 ~ 3%, the growth was inhibited.When the total amount of salt exceeds 3%, it dies in patches
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Euphrates poplar is highly adaptable to large temperature changes.It grows mainly by diving or river flooding, so it has roots that extend to shallow water, strong root pressure, and leaves containing sodium bicarbonate, which makes it resistant to drought and salt.Euphrates poplar is the only tree species living in the desert.Although it has retreated to the desert riparian region, it is still the soul of life in the desert known as the "sea of death".In the desert, the presence of water can be judged by the sight of fresh or dried Euphrates poplars in rows.Because of this, some people call Euphrates poplar an "irresponsible mother". It leaves its offspring everywhere, regardless of whether they die or live.In fact, this is a kind of helplessness to environmental restriction.
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Euphrates poplar is a unique and valuable forest resource in desert areas.Often growing in the desert, it is resistant to cold, drought, salt, anti - sand, has a strong vitality.Poplar forest is a unique and precious forest resource in the desert area. Its primary function is to prevent wind and solidify sand, create a suitable oasis climate and form fertile soil.Euphrates poplar is also known as the "patron saint of the desert".Euphrates poplar plays an important role in stabilizing the ecological balance of desert river zone, preventing wind and fixing sand, regulating oasis climate and forming fertile forest soil.It is the natural barrier for the development of agriculture and animal husbandry in desert areas.


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01.01.2020 16:57
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