Welcome to Chinese Agricultural Science Bulletin,
CASB

Chinese Agricultural Science Bulletin ›› 2014, Vol. 30 ›› Issue (30): 89-94.doi: 10.11924/j.issn.1000-6850.2014-1393

Previous Articles     Next Articles

Effects of Sowing Depth on Sorghum Seedling Emergence and Growth

  

  • Received:2014-05-14 Revised:2014-05-14 Accepted:2014-06-23 Online:2014-10-31 Published:2014-10-31

Abstract: In order to determine optimum sowing depth for sorghum and observe deep sowing tolerant difference for different sorghum hybrids, effects of 8 different sowing depths on seedling emergence and growth of 3 different sorghum hybrids were studied in the paper. Seedling emergence time and emergence rate of different sorghum hybrids were recorded, and above ground seedling lengths, hypocotyl lengths and radicle lengths were tested as seedling emergence was finished. It was showed that sowing depths had significant effects on sorghum seedling emergence from sowing. Seedling emergence rate decreased with the increasing of sowing depths. It was needed for 5 days, 5-7 days and 7-11 days that seedling emerged from sowing in 3 cm, 5 cm, 7 cm, and 8 cm, 10 cm, 12 cm, 13 cm and 17 cm sowing depths respectively.‘Jinzhong 0822’emerged 2- 4 days earlier than other two hybrids in 12 cm, 13 cm and 17 cm. Seedling emergence finish time was also different in different sowing depths. It was needed for 9 days, 9-13 days and 13 days that seedling emerged in 3 cm, 5 cm, 7cm, and 8 cm, 10 cm, 12 cm, 13 cm and 17 cm sowing depths respectively.‘Jinzhong 0822’ finished emergence for 9 days, which was earlier than other two hybrids in 8 cm, 10 cm, 12 cm and 13 cm. Final average emergence rates of 3 sorghum hybrids were infected by sowing depths significantly. Average emergence rates decreased with the increasing of sowing depths. 3 cm and 5 cm sowing depths were optimum for sorghum. Emergence rate of‘Jinzhong 0822’was significantly higher than other two varieties in 3 cm, 5 cm, 7 cm, 8 cm, 10 cm and 12 cm. Seedling growth was also infected significantly by sowing depth. Above ground seedling lengths and radicle lengths decreased and hypocotyl lengths increased with the increasing of sowing depths. It was showed that above ground seedling lengths, radicle lengths and hypocotyl lengths had significant difference in 3 cm and 5 cm than in other depths.‘Jinzhong 0822’was significantly different than other hybrids in 7 cm, 8 cm, 10cm, 12 cm, 13cm and 17 cm.