防御冷害技术,大致可分为两方面:一是通过提高水稻本身耐冷性来提高耐、抗低温能力,如选用耐冷性品种,培育壮秧和化学调节等。二是利用晒水池和防风网提高水温和深水灌溉保护幼穗等。从减轻冷害角度上看,前者可称为“主动性防御技术”,后者则为“被动性防御技术”。为了克服冷害,稳定北海道水稻产量,有必要同时采用两种技术,这就是常说的 Defense chilling injury technology, can be broadly divided into two aspects: First, by increasing the cold tolerance of rice itself to improve resistance to low temperature ability, such as the selection of cold-tolerant varieties, nurturing strong seedlings and chemical regulation. The second is the use of basins and windbreaks to improve water temperature and deep-water irrigation to protect young ears. From the perspective of mitigation of harm, the former can be called “proactive defense technology” and the latter “passive defense technology.” In order to overcome the chilling injury and stabilize the rice yield in Hokkaido, it is necessary to adopt both technologies at the same time, which is often said