Water requirement and water use efficiency in Eucalyptus flocktoniae (Maiden) Maiden and E. leucoxylon F. Muell.

تحقیقات جنگل و صنوبر ایران

Mohammad Hadi Rad¹  Mohammad Hasan Assareh²  Mehdi Soltani³ 

[1] Assistant Prof, Research Division of Natural Resources, Yazd Agricultural and Natural Resource Research and Education Center, AREEO, Yazd, Iran;Prof., Research Institute of Forests and Rangelands, Agricultural Research Education and Extension Organization (AREEO), Tehran, Iran;Research Expert, Research Division of Natural Resources, Yazd Agricultural and Natural Resource Research and Education Center, AREEO, Yazd, Iran;

关键词: Evapotranspiration;    drought stress;    Field capacity;    yield;   

DOI  :  10.22092/ijfpr.2017.112878

来源: DOAJ

【 摘 要 】

The response of plants to water available for strategy codification of water resources and irrigation is very important. In this study, evapotranspiration, crop coefficient, yield and water use efficiency in two species of Eucalyptus (Eucalyptus flocktoniae (Maiden) Maiden, E. leucoxylon F. Muell.) through lysimeter experiments were determinated under different soil moisture levels (100%, 70% and 40% of field capacity). The research was designed as a factorial experiment on a completely randomized design with three replications in Yazd climatic conditions. The results showed that with increasing soil moisture in both species, evapotranspiration increased, so that there were significant differences between the different levels of soil moisture treatments (p < 0.001). E. flocktoniae and E. leucoxylon had water requirement in 100% of field capacity treatment, 1185 mm and 1617 mm with 0.65 and 0.88 crop coefficients, respectively. Dry matter produced in all parts and the water use efficiency (WUE) of E. leucoxylon were significantly higher than that of E. flocktoniae, Water use efficiency measured in E. flocktoniae and E. leucoxylon, were 1.22 g/lit and 1.41 g/lit, respectively. Although the growth rate of E. leucoxylon is faster than E. flocktoniae , therefore its water requirement is higher , but considering an appropriate mechanisms for drought adaptation, it could be introduced for afforestation and wood production in arid and semi-arid regions.

【 授权许可】

Unknown