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一、农田灌溉发展趋向 (一)国内外农田灌溉发展趋向 由于水资源紧张和能源的不足,近些年灌水技术朝着省水节能的方向发展,特别注意研究节约用水和用水管理的新技术。发达国家中如美国、加拿大、日本等,将在灌溉面积基本不增加的基础上,主要依靠采用先进的灌水技术和提高管理水平,从而达到提高现有灌溉面积的单产。一些发展中国家如印度、墨西哥等,则着重以增加灌溉面积来提高总产量。
I. Development Trend of Farmland Irrigation (I) Trend of Irrigation in Farmland at Home and Abroad Due to the shortage of water resources and energy, irrigation technologies have been developing in the direction of saving water and energy in recent years. Special attention has been paid to new technologies for water conservation and water management. Developed countries, such as the United States, Canada and Japan, will basically rely on advanced irrigation technologies and management levels to achieve higher yields of existing irrigated areas, on the basis of basically no increase in irrigated area. Some developing countries like India and Mexico focus on increasing irrigated area to increase total output.