| Effects of water and fertilizer supply on physiology, growth and yield of drip-irrigation jujube in the southern Xinjiang sandy area |
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| DOI：10.7606/j.issn.1000-7601.2018.04.24 |
| Key Words: water and fertilizer supply southern Xinjiang sandy area drip-irrigation jujube physiology growth yield |
| Author Name | Affiliation | | BIAN Qing-yong | College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China | | WANG Zhen-hua | College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China；Key Laboratory of Modern Water-saving Irrigation Corp,Shihezi University,Shihezi, Xinjiang 832000,China | | HU Jia-shuai | College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China | | HE Xin-lin | College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China；Key Laboratory of Modern Water-saving Irrigation Corp,Shihezi University,Shihezi, Xinjiang 832000,China | | LI Chao-yang | College of Water Resources and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| To explore the effects of supplying water and fertilizer on yield, physiology and growth of drip-irrigation jujube in the southern Xinjiang sandy area, “Jun-jujube of the 8 years” was used for field experiment. A three-level-complete-treatment plot experiment of two factors of water and nitrogen under drip irrigation was conducted. Results showed that irrigation had significant (P<0.05) or highly significant (P<0.01) effect on jujube leaves’ photosynthetic characteristics (net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), intercellular CO2 concentration (Ci), water use efficiency (WUE), shoots diameter, length increment of jujube and irrigation water use efficiency (iWUE). Water and fertilizer interaction had significant (P<0.05) or highly significant (P<0.01) effect on photosynthetic characteristics, shoots diameter and length increment, yield and irrigation application use efficiency (iWUE). Fertilization had no significant effect on the above indices (P>0.05). Too high or too low irrigation level were unfavorable to photosynthesis,growth and yield increase of jujube. Low fertilizer level could promote jujube’s physiology and growth and increase jujube yield. Pn(8.94 μmol·m-2·s-1), Tr(3.86 mmol·m-2·s-1), Gs(0.49 μmol·m-2·s-1), Ci(707.41 μmol·m-2·s-1) with W2F1 treatment were at the maximum value, which increased by 23.00%,22.54%,58.06% and 58.08%,respectively, compared with the minimum value in all treatments; WUE value (2.56 μmol·mmol-1) was the highest under W3F3 treatment;The maximum increment in shoots diameter and tip length was in W2F2 treatment (6.31 mm) and W3F2 treatment (64 cm), respectively, with an increase of 51.32% and 33.33% compared with minimum treatment. A yield of 7 256 kg·hm-2 under W2F1 treatment, which was 55.67% higher than the minimum yield of all treatments. had the highest yield-increasing effect (33.14%). Irrigation application use efficiency (iWUE) under W1F3 treatment was at the maximum value, but showed no significant difference compared with W2F1 (P>0.05). Pn was closely related to transpiration rate and stomatal conductance. The correlation between yield and diameter increment of jujube was good. Diameter increment correlated with the jujube yield to some extent. According to the results, the preliminary conclusion could be reached that irrigation of 820 mm and fertilizer of N-P2O5-K2O:200-100-150 kg·hm-2(W2F1 treatment) was the best water-fertilizer supply model saving water and fertilizer in the southern Xinjiang sandy area. |
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