| Effect of different rewatering treatments on growth，yield and quality traits of rapeseed(Brassic napus L.) |
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| DOI：10.7606/j.issn.1000-7601.2016.06.31 |
| Key Words: Brassica napus L. rewatering drought tolerance yield trait quality trait |
| Author Name | Affiliation | | ZHU Zong-he | Department of Agronomy, Anhui Agriculture University, Hefei, Anhui 230036, China | | ZHENG Wen-yin | Department of Agronomy, Anhui Agriculture University, Hefei, Anhui 230036, China | | ZHOU Ke-jin | Department of Agronomy, Anhui Agriculture University, Hefei, Anhui 230036, China | | LIU Cui-he | Department of Agronomy, Anhui Agriculture University, Hefei, Anhui 230036, China | | ZHANG Xue-kun | Institute of Oil Crops Research, Chinese Academy of Agricultural Sciences, Wuhan, Hubei 430062, China |
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| Abstract: |
| The aim of this study was to investigate the effects of rewatering measures on root, growth, yield and quality traits of rapeseed (Brassica napus L.). The seedlings of two cultivars were treated by drought stress from 30 days after sowing (DAS30) to 100 days after sowing (DAS100), and then be rewatered by five treatments: ‘Irrigation(I)’、‘I+K(KCl)’、‘I+K+G(Gibberellin)’、‘I+N(Urea)’、‘I+N+G’. The results showed that: expect that the treatment of ‘I’ has no marked effect on the above-ground dry weight and ‘I+N’has no significant increase in total root dry weight in Wanyou No.19, compared to the control, the five rewatering treatments after drought stress at seedling stage could significantly increase the above-ground dry weight, total root dry weight, the seed yield and oil yield in Wanyou No.19 and Tianheyou No.11 with the average increase of 11.6%, 22%, 19% and 23.7%, respectively. Among the five rewatering treatments, ‘I+N+G’had the largest increase in the above-ground dry weight, total root dry weight, grain yield and oil yield with the average amplitude of 24.7%、27.7%、33.1% and 36.8%, respectively. Compared to the control, the order of increasing amplitude of yield from high to low is ‘I+K+G’ ，‘I+N’，‘I+K+G’，‘I+K’and ‘I’. The correlation analysis indicated that the main reason that the rewatering treatment could enhance yields owing to the significant increase of the total number of pods per plant. |
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