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在农业生产中,种植水稻牦水量极大。据试验,生产1吨稻谷需耗水2000吨左右。国外推广的节水种稻新技术,主要采取以下措施。 水田育种 所谓水田育种,就是将未发芽的稻种浸泡24小时后直接播种到稻田,保持水淹25～30天,这种方法比传统的先育苗后移栽法要节水20％～25％,且可节省劳力。 间歇灌溉 就是一次灌溉以后,在一定时间内中断灌溉,直到稻田地块即将干裂时进行再次灌溉、这种间歇性灌溉方法一直持续到水稻成熟和收获,一般可节水30％～40％。
In agricultural production, the amount of rice cultivation is extremely high. According to the test, the production of 1 ton of rice requires about 2000 tons of water consumption. The new technology of water-saving rice cultivation in foreign countries mainly adopts the following measures. Paddy field breeding The so-called paddy field breeding, that is, the non-germinating rice soaked 24 hours after sowing directly to the paddy fields, to maintain flooding 25 to 30 days, this method than the traditional method of transplanting seedlings to save water 20% to 25% And labor-saving. Intermittent irrigation is the process of irrigating a certain period of time after the first irrigating until the paddy fields are about to dry again. This intermittent irrigation continues until the rice is ripened and harvested, saving 30% to 40%.