| Drought resistance of pear jujube under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2014.04.007 |
| Key Words: drought stress pear jujube Loess Plateau wilting coefficient drought lethal point |
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| Abstract: |
| In order to explore the drought-resistant ability of pear jujube (Ziziphus jujuba Mill.cv.Lizao) in Loess Plateau region of northern Shaanxi, a pot experiment was conducted with 2-year old seedlings as the material, and its process from wilting to death was investigated under continuously unirrigated condition. The degenarative process of pear jujube under unirrigated condition was classified into four periods: temporary wilting, initial wilting, apparent permanent wilting and drought caused death. The results showed that the initial wilting coefficient of pear jujube was between 2.017% and 3.054% with an average of 2.494%; the apparent permanent wilting coefficient was between 1.199% and 1.998% with an average of 1.489%; the permanent wilting coef
ficient was between 1.250% and 1.489%; the drought lethal point was 1.250% and the lethal time was 135±11 days. It was concluded that pear jujube was a kind of drought-resistant fruit tree, and it could not become dead of drought in semi-arid loess hilly regions. |
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