| In order to study the effects of broadcasted seedling density on the formation of aromatic rice yield and its regulation factors, experiment was conducted on the effect on the formation of aromatic rice yield under different broadcasted seedling density. Broadcasted seedling density in the field was 1.8×105 hill/hm2, 2.4×105 hill/hm2, 3.0×105 hill/hm2, 3.6×105 hill/hm2, 4.2×105 hill/hm2, respectively, by using two aromatic rice cultivars , Basimadi and Nongxiang18. The result showed that straw weight and total biomass at maturity stage in two cultivars Basimadi and Nongxiang18 were significantly increased, however, harvest index significantly decreased,when broadcasted seedling density was in range between 1.8×105 hill/hm2 and 3.0×105 hill/hm2. There were higher harvested yield in Basimadi and Nongxiang18 when broadcasted seedling density was in range between 3.0×105 hill/hm2 and 3.6×105 hill/hm2. At the same time, there was remarkably positive correlation between harvested yield and the number of total panicle and 1 000-grain-weight. The results by path analysis also revealed that the contribution to yield was the biggest in the number of total panicle, which is 73.96%. The following was seed setting rate, spikelet per panicle and 1 000-grain-weight, respectively. |
