Effects of spraying paclobutrazol at different stages on agronomic characteristics,yield and quality of rapeseed

doi:10.14088/j.cnki.issn0439-8114.2023.01.004

Abstract

Abstract: Taking four varieties of rapeseed Zhongyouza 39, Zhongshuang 11, Huayouza 62 and Huayouza 9 as test material, spraying water was used as a control, and the effects of spraying paclobutrazol on agronomic characteristics,disease resistance,yield and quality at two stages（the closing of crop and the start of flower bud） were studied. The results showed that paclobutrazol treatment significantly decreased stem height, effective branch site, and the number of invalid branches and increased the number of effective siliques on branches and per plant, and it had little impact on other indicators at the closing of crop stage; beyond that paclobutrazol treatment significantly enhanced disease resistance and increased the yield and oleaginousness at two stages. However, the content of erucic acid and glucosinolate in rapeseed were significantly decreased at the closing of crop stage, and the performance was consistent between different varieties of rapeseed. This study showed that the paclobutrazol treatment decreased stem height, increased yield and improved quality in rapeseed at 150 mg/L concentration conditions at the closing of crop stage.

Key words: paclobutrazol, rapeseed（Brassica napus L.）, spraying stage, yield, rapeseed quality

CLC Number:

S565.4

CHU Qian-mei, BAI Gui-ping, XIE Jie, XIE Xiong-ze, YING Yu-feng, WANG Dun, FENG Peng. Effects of spraying paclobutrazol at different stages on agronomic characteristics,yield and quality of rapeseed[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(1): 18-22.

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