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| Soil Moisture Variation after Irrigation in Ziziphus jujuba Field in the Lower Reachs of Tarim River |
| Du Hulin1, Ma Wenyi1,2, Feng Qi1, Shi Xuebin3, Ma Zhenyong1,2 |
1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Water Resource Bueau, Second Agricultural Division, Xinjiang PLA Production Corps, Kurle 841000, Xinjiang, China |
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Abstract Based on the contrast experiments of root irrigation and flooding irrigation of Ziziphus jujuba, we monitor the soil water variation processes with TDR instrument. The soil water conditions were analyzed, the growing period, soil water distribution state and variation characteristics were known. The results show that the first 10 h after the irrigation was a sharp increase period of soil water; during the soil water depletion period the mean decrease rate was 0.69%; the suitable soil water content for the growth of Z. jujuba should be maintained more than 75% of soil saturation water content, ranging from 37%-45%; the minimum soil irrigation water requirement should not be lower than 68% of the saturated water content, namely not lower than 33.6%. According to the analysis of soil water depletion rate during the growing season of Z. jujuba, the irrigation interval of Z. jujuba averaged 22 d. This study provides the experimental data and theoretic basis for better popularize and use the water-saving root irrigation technique and to conduct rational irrigation of Z. jujuba trees.
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Received: 20 April 2013
Published: 20 May 2014
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2014, Vol. 34 
