引言多年实践表明,推广适应当地的水稻优良品种,是提高水稻产量的有效措施之一。但从当前大面积生产上来看,同一田坝所推广的同一个水稻优良品种,其产量表现各有所不同,有高、有低、甚至于不增产。其主要原因:是对水稻优良品种的生育规律和所采用的栽培技术措施不相适应,良种的增产 Introduction Many years of practice have shown that promoting and adapting to local fine varieties of rice is one of the effective measures to increase rice yield. However, from the current large-scale production point of view, the same paddy promoted by the same rice varieties, the performance of their performance vary, high, low, or even not increase production. The main reason is that the law of fertility of fine varieties of rice is incompatible with the cultivation techniques and the yield increase of the elite