| 郭巨先，王 惠，张 亮，温静涛，康云艳，杨 暹，佟嘉乐.2, 4 - 表油菜素内酯对菜心生长和菜薹营养品质的影响[J].广东农业科学,2021,48(4):29-36 |
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2, 4 - 表油菜素内酯对菜心生长和菜薹营养品质的影响 |
| Effect of 2, 4-epi-Brassinolide on the Growth and Flower Stalk Quality of Flowering Chinese Cabbage |
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| DOI：10.16768/j.issn.1004-874X.2021.04.005 |
| 中文关键词: 菜薹 2, 4 - 表油菜素内酯（EBR） 调节生长 品质 |
| 英文关键词: flowering Chinese cabbage 2, 4-epibrassinolide regulating growth quality |
| 基金项目:广东省自然科学基金（2018A0303130316）；广东省现代农业产业技术体系创新团队项目（2020KJ122）；广州市级财政补助资金农业农村项目（19300800）；广东省科技计划项目（2018B020202010） |
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| 中文摘要: |
| 【目的】研究 2, 4 - 表油菜素内酯（EBR）对菜心生长和菜薹营养品质的影响，筛选 EBR 的最佳施
用浓度和喷施时期。【方法】以广东四九 - 油青菜心品种为试验材料，分析不同浓度、不同时期喷施外源 EBR 对
菜心生长和菜薹营养品质指标的影响。【结果】喷施 EBR 能影响菜薹生长和营养指标，喷施低浓度（0.01~0.05 mg/L）
EBR 可提高菜心的薹长和薹粗，以及 Vc、叶绿素、可溶性糖、可溶性蛋白、全氮、全磷和全钾含量，降低纤维素
含量；而喷施高浓度（0.14~0.17 mg/L）EBR 可增加菜薹全氮、全磷和全钾的含量。苗期喷施低浓度（0.01~0.05 mg/L）
EBR 对菜薹生长和营养指标的提高效果最好，苗期喷施 0.05 mg/L EBR 菜薹的纤维素含量降幅最大，由对照的 5.70%
降至 3.88%；苗期 + 抽薹前喷施 0.05 mg/L EBR 菜薹的全氮含量增幅最大，由对照的 0.75% 显著增加到 1.19%；而
在抽薹前喷施 0.14 mg/L EBR 菜薹的全磷和全钾含量最高，分别达到 0.36% 和 7.00%。【结论】菜心施用 EBR 以低
浓度（0.01~0.05 mg/L）为宜，处理时期以苗期喷施或苗期 + 抽薹前喷施效果较好。 |
| 英文摘要: |
| 【Objective】The effects of 2, 4-epibrassinolide (EBR) on the growth and flower stalk nutritional quality
of flowering Chinese cabbage (Brassica parachinensis Bailey) were studied in order to screen out optimal application
concentration and spraying period. 【Method】With the cultivar “Sijiu Youqing” as tested material, the effects of
exogenous EBR at different concentrations and spraying periods on the growth and flower stalk nutritional quality of flowering
Chinese cabbage were analyzed. 【Result】Spraying EBR could affect the growth and nutrition indicators of flowering
Chinese cabbage. Spraying low concentrations (0.01-0.05 mg/L) of EBR significantly increased the flower stalk length and
diameter and the contents of Vc, chlorophyll, total soluble sugar, soluble protein, total nitrogen and total potassium, while
reduced the cellulose content. However, spraying high concentrations of EBR (0.14-0.17 mg/L) significantly increased the total nitrogen, total phosphorus and total potassium contents of flowering stalk. Based on the plant growth and nutritional quality
after treatments with EBR at three growth periods, spraying low concentrations (0.01-0.05 mg/L) of EBR at seedling stage had
the best effect on improving the growth and nutrition indicators of flowering stalks, and spraying 0.05 mg/L of EBR had the
largest reduction in the cellulose content, which reduced from 5.71% of the control to 3.88%. Spraying 0.05 mg/L of EBR at the
stages of seedling and before-bolting had the largest increase effect on the total nitrogen content, which increased from 0.75% of
the control to 1.19%; while the flowering stalks sprayed with 0.14 mg/L of EBR at before-bolting stage had the highest contents
of total phosphorus and potassium, reaching 0.36% and 7.00%, respectively. 【Conclusion】The suitable concentration of EBR
used in flowering Chinese cabbage was 0.01-0.05 mg/L, and the spraying period was better at the seedling stage or at the stages
of both seedling and before-bolting. |
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