Research On Water Consumption Rule Of The Cotton And Water Salinity Dynamics Under Different Salt Content Of Subirrigation Treatments With Plastic Films

This test use one of the most water-saving irrigation techniques currently --drip irrigation under mulch, the Tarim Basin take and mix with underground salt water (salinity 3.56g / l) of the Tarim Basin and surface fresh water (salinity 0.40 g / l ) in different proportions, set up six kinds of treatments (Table 2-1), irrigation water for irrigation, a flat amount of time, a unified, uniform flow rate, the allocation of irrigation water is in the water bottle for Markov bottle, irrigating after uniform deployment.1.The influence of Brackish water under mulched drip irrigation on growth, yield and quality of cotton is shown: In addition to the larger influence of treatment 5 (3.56g / l) on growth, yield and quality of cotton, and some treatments will stimulate the growth of plants. Salt water of different salinity impact of irrigation on cotton production research shows that: Bolls With the increase of salinity of irrigation water is reduced, The yield, compared with treatment 1 (1.98g / l), for treatment 5 (3.56g / l) cuts the highest percentage, 29.69%, while the difference of boll weight and lint percentage among The various treatments is not significant.2. The influence of Brackish water under mulched drip irrigation on water consumption rule of cotton is shown: these types of treatment and the control (full light) are basically in line with the various periods of cotton evapotranspiration and water laws, but compared with the control, we can see the water consumption intensity change of treatment 3 (2.77g / l) is more severe, Other treatments do not significantly change, from which we can determine treatment 3 (1 light 3 salt) is a cotton irrigation threshold.3.The influence of Brackish water under mulched drip irrigation on the change of water and salt that soil moisture is shown: 20cm depth of soil volumetric water content of the surface wave is stronger than 50cm depth of soil volumetric water content. Dynamics of soil salinity showed :0-50cm layer of salt water with the dynamics of change, the law increased the soil volumetric water content, salinity decreased, whereas the volume of soil water content decreased, the salinity increased.