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通过建立数学模型,利用Hydrus-2D软件模拟双管不对称布置和三管布置下的水分入渗特征,分析与葡萄根系分布的耦合程度。采用大田试验进行了验证,与模拟结果进行了对照,结果表明:双管不对称和三管布置条件下湿润剖面比较接近,双管不对称布置模式水分分布比较均匀,垂直湿润深度在60 cm左右,水平湿润宽度约100 cm;三管布置模式的垂直湿润深度为60 cm,水平湿润宽度约120 cm。双管流量不对称布置在产量及葡萄生长等方面均能达到三管布置方式的效果。确定采用双管流量不对称布置方式可以替代三管布置方式,同时,也说明在田间毛管布置方式筛选及优化分析时,采用数学模型分析的方法,可大大减少进行野外试验的工作量,在简化研究过程的同时能够得到科学的研究成果。
By establishing a mathematical model and using Hydrus-2D software to simulate the asymmetric two-tube arrangement and the infiltration characteristics under three-tube arrangement, the coupling degree with root distribution of grape was analyzed. Field experiments were used to verify the results and the simulation results were compared. The results show that the two sections are close to the wet sections under asymmetric and three-tube arrangement. The two-tube asymmetric arrangement has a more uniform water distribution and the vertical wet depth is about 60 cm , The horizontal wetting width is about 100 cm; the vertical wetting depth of the three-tube arrangement mode is 60 cm and the horizontal wetting width is about 120 cm. Asymmetric arrangement of two-tube flow can achieve the effect of three-tube arrangement in terms of yield and grape growth. It is determined that the asymmetric arrangement of two-pipe flow can replace the arrangement of three pipes and the method of mathematical model analysis for selecting and optimizing the capillary arrangement in the field can greatly reduce the workload of field experiments. The research process at the same time be able to get scientific research results.