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[1]LIU Hong-bo.Study on the Rule of Hydraulic Resistance of Grape in SPAC System in Extreme Arid Region[J].Research of Soil and Water Conservation,2011,18(06):185-189.

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Study on the Rule of Hydraulic Resistance of Grape in SPAC System in Extreme Arid Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 06 Page number: 185-189 Column: Public date: 2011-12-20

Title:: Study on the Rule of Hydraulic Resistance of Grape in SPAC System in Extreme Arid Region

Author(s):: LIU Hong-bo^1,2; 1. College of Water Conservancy and Civil Engineering, Xinjiang Agriculture University, Urumqi 830052, China;
2. Xinjiang Research Institute of Water Resources and Hydropower, Urumqi 830049, China

Keywords:: grape; soil-plant-atmosphere continuum; hydraulic resistance; stomatal resistance

CLC:: S152.7

DOI:: -

Abstract:: The water distribution and variation of resistance, the stomatal resistance under different water treatments for a few days, and the relationship between stomatal resistance, soil water potential and leaf water potential were studied with the mature Thompson Seedless grapes as research material, with the drip irrigation technology in the extreme drought condition. The results showed that: the transpiration rate in each of the water treatments is getting slower over time after the irrigation. The transpiration rate of the high water treatment is the highest, the transpiration rate of low water treatment is in the middle, and lowest treatment has the lowest rate. The stomatal resistance performed the opposite trend compared with the transpiration rate, increasing as the irrigation time extends. The stomatal resistance is getting larger as the leaf water potential is getting smaller, showing the negative correlation. The stomatal resistance is only significantly related to soil water potential of 0-20 cm layer in high and middle water treatments, and related to soil water potential between 20 cm and 30 cm significantly in low water treatment. The flow resistance of leaf-air system is the largest in every flow resistances, taking up 98.8%~99.0% of the total flow resistances in this continuum, whereas the flow resistance in the plants ranks the second position, taking up 1.02% ~1.21%. The soil resistance is the smallest, takes the negligible proportion.

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