优质早稻生长后期如出现热害、早衰、刈青、倒伏或收获后暴晒都会严重降低优质早稻的米质。因此优质早稻后期管理要注意“五防”。防热害7月份是高温期,如出现火南风等高温天气,可灌深水降温,保持田间水层5～6厘米,做到日灌夜排。对灌溉条件差的稻田,灌4厘米左右深的水层,保持2 High-quality early rice growth if late heat, premature aging, mowing, lodging or post-harvest exposure will seriously reduce the quality of early rice quality. Therefore, high-quality early rice management should pay attention to “five defenses.” Anti-thermal July is the high-temperature period, such as the emergence of high temperature and other hot weather Southerly, deep-water irrigation can be cooled to maintain field water 5 to 6 cm, so that day irrigation night row. In poorly irrigated paddy fields, keep a depth of about 4 cm of water and keep 2