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从1981年起在我市建立有代表性4个苗情点,确定专人负责,系统进行观察,已积累了庞大的资料,在生产实践中运用叶龄指标,科学地指导水稻的栽培管理,取得了明显的增产效果。1985年全市46万亩双季稻平均亩产达到965.5公斤,比1984年单产提高46公斤,单产居全省第一。多年来,我们对水稻栽培中的“三个适期”即移栽适期、蘖肥适期、晒田适期。“三个临界期”即移栽临界期、蘖肥临界期、晒田临界期的叶龄指标观察表明,不同类型品种一生中的叶片数,在无特殊气候条件的影响下有相对的稳定性,而出叶速度有明显的规律性。通过计算叶龄来掌握水稻的发育进程,采取最佳有效的栽培技术措施,以达到增产增收的目
Since 1981, we have set up representative 4 seedling points in our city, identified special personnel responsible for systematic observation, have accumulated a huge amount of data, used leaf age indicators in production practices, and scientifically directed the cultivation and management of rice to obtain Significant increase in production. In 1985, the average yield per mu of 46 million mu of double-crop rice in the city reached 965.5 kilograms, 46 kilograms more than the yield in 1984, ranking the first in the whole province. Over the years, we planted rice in the “three appropriate” that is suitable for transplanting, tillering period, Shaotian appropriate period. “Three critical periods” ie critical stage of transplanting, critical stage of tillering, leaf critical index at the critical stage of shading showed that the number of leaves in different types of cultivars was relatively stable under the condition of no special climatic conditions , While the speed of leaves have obvious regularity. By calculating leaf age to master the development of rice, to take the best and effective cultivation techniques and measures to achieve the goal of increasing production and income