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早衰是限制杂交水稻高产的主要障碍因子。后期保护好茎叶,防止早衰,增强稻株抽穗后的光合效率,增加营养积累,是实现杂交中稻高产的关键。其主要措施是: 一、补肥增源。杂交中稻抽穗以后,功能叶逐渐枯黄。如果后期脱肥,则叶片会过早枯衰,使绿叶面积减少,稻株的光合作用即被削弱,导致空秕粒增加,千粒重下降,产量降低。通
Premature aging is a major obstacle to the high yield of hybrid rice. It is the key to achieve high yield of mid-season hybrid rice by protecting the stems and leaves, preventing premature aging, enhancing the photosynthetic efficiency after heading and increasing the accumulation of nutrients. The main measures are: First, fill fertilizer source. After heading hybrid rice, functional leaves gradually yellow. If the post-fertilization, the leaves will premature withered decline, so that the green leaf area decreased, rice plants that are weakened photosynthesis, resulting in increased Kong Kong tablets, grain weight decreased, reduced production. through