问:为什么说“黑”“黄”交替变化的看苗诊断法,是指导水稻高产栽培的重要根据? 答:看苗诊断,包括水稻一生中的叶色、长势、长相三个方面。高产的长相,对同一个品种是可以掌握的;叶色如同人的脉膊,是反映稻株生长、碳氮代谢、营养状况的最敏感标志。所以,叶色的“黑”“黄”交替变化,是看苗诊断的主要内容。看苗诊断,就象医生给病人看病时摸脉、量体温一样,通过瞻前、顾后,看当时的全面分析,以长相为目标,以叶色为衡量长势、预测长相的信号,决定水稻各个生育阶段应采取的栽培技术措施,使水稻的 Q: Why do we say that the “black” and “yellow” alternative seedling diagnostic method is an important basis for guiding high-yielding rice? A: The seedling diagnosis, including rice leaf color, growth, appearance in three aspects. High-yielding appearance, the same species can be mastered; leaf color as human pulse, is to reflect the growth of rice plants, carbon and nitrogen metabolism, nutritional status of the most sensitive signs. Therefore, the leaves of the “black” “yellow” alternating changes, is to see the main content Miao diagnosis. Look Miao diagnosis, as the doctor to the patient when the touch of touch of arteries, the amount of body temperature, the same look through the front, after care, look at the time a comprehensive analysis to look looks as the goal, to measure the color of the leaf color, the forecast signal appearance, Various stages of fertility should take the cultivation of technical measures to make rice