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CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2020, Vol. 42 ›› Issue (2): 188-.doi: 10.19802/j.issn.1007-9084.2020039

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Improved substrate for rapeseed blanket seedling Ⅲ Application and concentration of uniconazole

  

  1. Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/Ecology and Cultivation in Middle and LowerReaches of Yangtse River of Ministry of Agriculture and Rural Affairs, Yangzhou University, Yangzhou 225009, China
  • Online:2020-04-28 Published:2020-05-22

Abstract: To obtain strong blanket seedling by optimal uniconazole treatment, double-low rapeseed (Brassicanapus) cultivar Ningza 1838 was used to analyze the effect of different uniconazole by 0, 20, 40, 60 and 80 μg/L insubstrate during growth process. The objective was to explore the best nursery substrate of blanket seedling suitablefor mechanical transplantation and light-and-optimized cultivation. Results showed that afterapplication of unicon⁃azole in substrate, plant height decreased, root collar length shortened, and root collar became thicker. By regressionequation, when mixed with 33.7 μg/L uniconazole in substrate, seedling elongation was inhibited, dry matter accu⁃mulation was increased. It had less effect on surviving seedling numbers. Compared with contrast, it significantly in⁃creased leaf numbers, promoted thick roots and necks, and led to strong seedlings, which was suitable for mecha⁃nized transplanting.

Key words: Brassica napus L., rapeseed blanket seedling, uniconazole, seedling quality

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