Abstract:
In order to screen sorghum varieties suitable for Jiangxi, four northern sorghum varieties(Longza 19, Jinza 22, Jiza 228, and Jiniang 2) were treated with three sowing dates(April 16, April 25 and May 5) in Jiangxi to investigate the effects of sowing dates on sorghum yield and yield traits. The results showed that sowing date can significantly affect the growth process of sorghum. With the postponement of sowing date, the seedling emergence period, flowering period, and maturity period are successively delayed, but the entire growth period of sorghum was shortened. Sowing date had no significant impact on sorghum plant height, but its impact on ear length was different with different varieties. The effect of sowing date on spike diameter and 1 000-grain weight showed a trend of decreasing first and then increasing with the delay of sowing date. Early sowing sorghum varieties had the largest single spike weight and the highest yield. Among the tested varieties, Jiniang 2 obtained the highest yield of 385.1 kg·(667 m~2)
-1 by early sowing, with the best performance in comprehensive traits.