关键词: 塔里木河, 根灌, 枣树, 土壤水分, 节水

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.

Key words: Tarim River, root irrigation, Ziziphus jujuba, soil moisture, water saving