论文部分内容阅读
间歇畦灌是一种节水型改进地面灌水新技术。本文就其影响间歇畦灌灌水质量的技术参数进行了田间正交试验，并对间歇畦灌的节水机理及其影响因素进行了探讨。通过对试验资料的分析研究，得出了获得最大灌水均匀度的技术参数最佳组合方案，发现了间歇畦灌节水主要是由于前次供水期间表层土壤形成致密层、土壤渗吸率下降、田面糙率变小等，在相同条件下，间歇畦灌比连续灌节水２１％，灌水效率提高１８．５％。
Intermittent irrigation is a water-saving new technology to improve surface irrigation. In this paper, the field orthogonal test was conducted on the technical parameters affecting the intermittent irrigation water quality, and the water saving mechanism and its influencing factors of intermittent irrigation were discussed. Through the analysis of the experimental data, the optimal combination of technical parameters for obtaining the maximum irrigation uniformity was obtained. It was found that the intermittent irrigation was mainly due to the formation of dense layer of surface soil during the previous water supply and the decrease of soil permeability, Under the same conditions, the intermittent irrigation was 21% more than that of continuous irrigation and the irrigation efficiency was increased by 18.5%.