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选用几个杂交水稻品种在高产栽培条件下进行特性分析与研究,得出品种生育期与其叶龄有明显的正相关,生育期长的品种比生育期短的品种主茎叶片数多,营养生长期间长,比早熟品种易获得高产;对秧田期叶龄生长快的品种要及时做好栽插准备工作,避免栽老秧;在控苗措施中早熟品种要推迟控苗,迟熟品种宜提早控苗,以避免群体不足或过大;构成水稻产量的三因素中,争取大穗多粒是提高产量的关键;从各品种的籽粒灌浆速度来看,晚熟品种比早熟品种灌浆期延长,故此晚熟品种在灌浆成熟期田间不能排水过早,否则会使千粒重降低。
Selection of several hybrid rice varieties in high yielding cultivation conditions for characterization and research concluded that the varieties of the growing season and its leaf age has a clear positive correlation between the growth of long varieties than the short duration of the varieties of the main stem leaves more nutrients Long growing period, easy to obtain than the early varieties of high yield; Rapid growth of leafy seedling in time to make good preparations for transplanting, to avoid planting seedling; precocious varieties in seedling control delay the control seedlings, late varieties should be Early seedling control in order to avoid the group is insufficient or too large; constitutes three factors of rice yield, for the big spike and more grain is the key to improve yield; From the grain filling rate of each variety, late maturing varieties than the early maturing varieties of grain filling period, Therefore, late-maturing varieties in the field of filling mature field can not be drained too early, otherwise it will reduce the 1000-grain weight.