Impacts of Seedling Age on Early Rice Yield and Yield Component Factors

Using hybrid early rice Liangyou 302 as experiment material,the effects of seedling age on growth characteristics,breed features and yield performance of rice with transplanting and seedling throwing methods were studied.The results showed that there were the same performance tendencies in growth characteristics,breed features and yield performance between transplanting rice and seedling throwing rice.Early planting at suitable age had the advantages of premature and early maturity.The vegetative period of 20 days-seedlings prolonged 3~10 d and its mature period arrived 2~6 d ahead of time.There were very significant negative correlations between seedling age and effective panicles,total grain number and yield.