| Variability of Young jujube tree sap flow under different irrigation amount |
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| DOI：10.7606/j.issn.1000-7601.2016.01.04 |
| Key Words: irrigation amount tree pit irrigation young jujube tree sap flow rate environmental factors |
| Author Name | Affiliation | | LI Hong | Xinjiang Academy of Forestry Sciences, Urumqi, Xinjiang 830000, China | | LIU Bang | Forestry and Horticulture College, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | CHENG Ping | Xinjiang Academy of Forestry Sciences, Urumqi, Xinjiang 830000, China | | HAN Ying-ying | Xinjiang Normal University, Urumqi, Xinjiang 830054, China | | ZHANG Zhi-gang | Forestry and Horticulture College, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | WANG Zhen-zhen | Forestry and Horticulture College, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | WU Yu | Xinjiang Normal University, Urumqi, Xinjiang 830054, China | | MIAO Qian-qian | Forestry and Horticulture College, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | LI Huan | Xinjiang Uygur Autonomous Region Forestry Department, Urumqi, Xinjiang 830000, China |
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| Abstract: |
| This study aims to explore the influence of different irrigation water (W1,32 L; W2,48 L; W3, 64 L; W4,80 L) on stem flow rate of four years jujube tree, using Flow-32 package type stem to determine the stem flow rate and a HOBO microclimate instrument to monitor solar radiation, temperature, air humidity and wind speed and other meteorological data. The results showed that: Under different irrigation water, jujube stem flow rate exhibited an unimodal type curve, increasing with the increase of irrigation water and showing average peak of 516.63, 819.04 g·h-1 and 974.86 g·h-1 for W1, W2 and W3, respectively; Cumulative dynamics of stem flow showed a clear “S” shape, with W1, W2, W3 and W4 having the value of 4.98 L and 7.02 L and 9.10 L and 8.63 L, respectively. Correlation analysis revealed that flow rate was positively related with the solar radiation, temperature and wind speed at significant level, the highest correlation coefficients existing with the sun's radiation. By contrast, air humidity was negatively correlated with sap flow. |
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