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Water sources of Nitraria sibirica and response to precipitation in two desert habitats
Ist Teil von
Ying yong sheng tai xue bao, 2017-07, Vol.28 (7), p.2083-2092
Ort / Verlag
China
Erscheinungsjahr
2017
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
Nitraria sibirica usually exists in a form of nebkhas, and has strong ecological adaptability. The plant species has distinctive function for wind prevention and sand fixation, and resistance drought and salt. However, the water condition is still a limiting factor for the plant survival and development. In order to understand the water use strategy of the plant in different desert habitats, we selected the N. sibirica growing in sandy desert habitat and gravel desert habitat to study the seaso-nal variation of plant water sources and response to precipitation at the edge of the oasis of Linze in the Hexi Corridor. We measured the oxygen stable isotope of the plant stem water and the different potential water sources (precipitation, soil water and ground water), and used the IsoSource model to calculate the proportion of water sources from the potential water. The results showed that there were significant seasonal variation characteristics of δ
O value and water source of stem water for the plant in the two