ACTA AGRICULTURAE BOREALI-SINICA ›› 2016, Vol. 31 ›› Issue (S1): 41-46. doi: 10.7668/hbnxb.2016.S1.007

Special Issue: Soil fertilizer

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Research on Mechanism of Soil Moisture Migration under Drip Irrigation in Solar Greenhouse

ZHANG Yuliang1, SHAN Xiaozheng3, WANG Kun2, NIU Guobao3, ZHANG Yuanfang2   

  1. 1. Tianjin Agricultural Resources and Environmental Research Institute, Tianjin 300192, China;
    2. Tianjin Modern Agricultural Science and Technology Innovation Base Management Center, Tianjin 300192, China;
    3. Vegetable Research Institute, Tianjin Kernel Agricultural Science Technology Corporation Limited, Tianjin 300384, China
  • Received:2016-10-11 Published:2016-12-28

Abstract: The research of wetting front movement rules and soil water content distribution characteristics were carried out on fluvial aquic soil in Wuqing district of Tianjin,China. The experiment adopted the method of continuous monitoring soil profile in solar greenhouse field cultivated tomatoes under the condition of drip irrigation. The results showed that wetting front horizontal moving distance reached more than 10 cm within 0.5 h after the start of the drip irrigation,more than 12 cm within 1 h. Horizontal moving distance still continued to increase after stopping irrigation,reached to the stability distance of 14.5-15.0 cm after irrigation 1.5 d. The vertical moving distance of wetting front reached more than 30 cm within 0.5 h after the start of drip irrigation. It continued to move down after stopping irrigation,reached 49.5-53.0 cm after 6 h,and was stable to 52.5-55.7 cm after drip irrigation 1.5 d. The horizontal moving distance and vertical moving distance of wetting front were positively correlated with irrigation quota. The soil water content of 20-40 cm soil layer just below the drip hole was reached the maximum value after irrigation 6-10 h,then decreased gradually. The bigger the irrigation quota,the shorter the time needed to reach the maximum value of soil water content. Soil water content of 20-40 cm soil layer just below the drip hole was 33.0%-34.0% after irrigation 3 h,meanwhile the soil water content of 20-40 cm soil layer where horizontal distance is 10 cm from the drip hole was 30.0%-31.0%. The soil water content of 20-40 cm layer where horizontal distance is 15 cm from the drip hole was 28.0%-29.0% after irrigation 6 h,soil relative humidity was 81%-84%. The duration time which soil water content of 20-40 cm soil layer is suitable for plant growth was increased with irrigation quota,the duration time of irrigation quota 135 m3/ha was 8 d,and 180 m3/ha was 11 d. The soil water content of 0-20 cm soil layer decreased to 28.0%-28.5% after irrigation 10 d,the soil relative humidity was 80%-82%,meanwhile the soil water content of 20-40 cm soil layer was 30.5%-31.2%. W hile irrigation quota of tomato is 135-180 m3/ha in the heavy soil greenhouse,the irrigation interval is required to be 10 d or so.

Key words: Wetting front, Drip irrigation, Heavy soil, Soil water dynamics, Solar greenhouse

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Cite this article

ZHANG Yuliang, SHAN Xiaozheng, WANG Kun, NIU Guobao, ZHANG Yuanfang. Research on Mechanism of Soil Moisture Migration under Drip Irrigation in Solar Greenhouse[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2016, 31(S1): 41-46. doi: 10.7668/hbnxb.2016.S1.007.

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