Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (14): 11-17.doi: 10.11924/j.issn.1000-6850.casb2021-0479

Special Issue: 生物技术 油料作物 水稻

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Effects of Seed Soaking Reagents on Rapeseed Seedling Quality Under Rice-residue Returning to Field

GUO Dong(), HONG Yue, ZHANG Mengdie, ZHOU Kejin()   

  1. Anhui Agricultural University, Hefei 230036
  • Received:2021-05-06 Revised:2021-08-13 Online:2022-05-15 Published:2022-06-07
  • Contact: ZHOU Kejin E-mail:2257498807@qq.com;zhoukejin@163.com

Abstract:

The aims are to alleviate the negative effects of rice-residue returning to field on direct-seeding rapeseed, and achieve the full and strong seedling. ‘Fengyou 737’ was used as material, and the effects of different seed soaking reagents on the germination and seedling of direct-seeding rapeseed were studied under rice-residue returning to field. Results showed that under rice-residue returning to field, treated with C1 (40 mg/L gibberellin + 200 mg/L ammonium molybdate + 2000 mg/L potassium dihydrogen phosphate + 400 mg/L boric acid) and C2 (100 μmol/L melatonin + 200 mg/L ammonium molybdate + 2000 mg/L potassium dihydrogen phosphate + 400 mg/L boric acid), the number of seedlings per square were increased by 23.28% and 3.97% compared with that of CK. The root length and hypocotyl length of seedlings treated with C1 reagent were increased. The toot length was increased and the hypocotyl length was decreased compared with those of CK in the C2 reagent treatment. The dry matter accumulation of seedlings treated with C1 and C2 reagents were all increased compared with that of CK. We also found that C1 and C2 reagents relieved the harmful effect of rice-residue returning to field on the seedling of direct-seeding rapeseed. C2 reagent treatment was better than C1 reagent treatment by promoting the root development and strong seedling under rice-residue returning to field.

Key words: seed soaking, rice-residue returning to field, strong seedling, direct-seeding rapeseed, seedling emergence rate

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