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草业学报 ›› 2024, Vol. 33 ›› Issue (10): 159-170.DOI: 10.11686/cyxb2024016

• 研究论文 • 上一篇    

黄梁木叶多酚提取工艺优化及其对柱花草青贮品质的影响

黄佩珊(), 臧美琪, 张炜灵, 陈俊戬, 刘立轩, 张庆()   

  1. 华南农业大学林学与风景园林学院,广东木本饲料工程技术研究中心,广东 广州 510642
  • 收稿日期:2024-01-11 修回日期:2024-02-29 出版日期:2024-10-20 发布日期:2024-07-15
  • 通讯作者: 张庆
  • 作者简介:Corresponding author. E-mail: zqing1988@126.com
    黄佩珊(1997-),女,广东广州人,在读硕士。E-mail: 529391981@qq.com
  • 基金资助:
    国家自然基金(32371771);长隆集团科研项目(F110020230509);内蒙古科技厅重大专项(2021ZD0048)

Optimization of extraction process of Neolamarckia cadamba leaf polyphenols and its effect on Stylosanthes guianensis silage

Pei-shan HUANG(), Mei-qi ZANG, Wei-ling ZHANG, Jun-jian CHEN, Li-xuan LIU, Qing ZHANG()   

  1. College of Forestry and Landscape Architecture,South China Agricultural University,Guangdong Research Center of Woody Forage Engineering Technology,Guangzhou 510642,China
  • Received:2024-01-11 Revised:2024-02-29 Online:2024-10-20 Published:2024-07-15
  • Contact: Qing ZHANG

摘要:

为探究黄梁木叶多酚(NCLP)超声辅助提取最佳工艺条件,并研究其对柱花草青贮品质的影响。采用响应面分析法中Box-Behnken Design试验优化NCLP提取工艺条件,同时柱花草青贮试验设3个处理:无添加(对照,CK)、添加1% NCLP(NCLP1)和2% NCLP(NCLP2)。青贮30 d后,测定以上3个处理柱花草的营养成分和发酵品质。结果表明,黄梁木叶多酚的最佳提取工艺为:甲醇浓度71%、液料比30 mL·g-1、提取时间37 min、超声功率250 W。在该提取条件下获得的黄梁木叶多酚为136.82 mg GAE·g-1 DM。在柱花草青贮中添加NCLP可极显著降低pH值、氨态氮含量和干物质损失率(P<0.01),极显著增加乳酸菌数量、乳酸和乙酸含量(P<0.01)。此外,添加2% NCLP还能显著增加真蛋白的含量(P<0.05),显著降低中性洗涤纤维和酸性洗涤纤维的含量(P<0.05)。综上,本研究获得了NCLP的最佳提取工艺,发现NCLP能改善柱花草的青贮品质,以2%NCLP改善效果更好。

关键词: 黄梁木叶多酚, 响应面法, 青贮品质

Abstract:

The purpose of this study was to investigate the optimal ultrasonic-assisted extraction conditions of Neolamarckia cadamba leaf polyphenols (NCLP) and its effect on Stylosanthes guianensis silage quality. The Box-Behnken design experiment in response surface analysis was used to optimize the process conditions of ultrasonic-assisted extraction ofNCLP. There were 3 treatments in the silage experiment: No addition (control, CK), 1%NCLP and 2% NCLP. After 30 days of ensiling, the nutrient composition and fermentation quality of S. guianensis silages with the above three treatments were measured. The results showed that the optimum extraction conditions were: a methanol concentration of 71%, a liquid∶solid of 30 mL·g-1, an extraction time of 37 min, and ultrasonic power of 250 W. Under the optimal conditions, the NCLP content was 136.82 mg Gallic acid equivalent(GAE)·g-1 DM. Compared with the control group, the NCLP addition treatments significantly reduced(P<0.01) the pH value, ammonia nitrogen content and rate of dry matter loss in S. guianensis silage, and significantly increased(P<0.01) lactic acid bacteria number, lactic acid and acetic acid content. Furthermore, the addition of 2% NCLP caused a significant decrease in the content of neutral detergent fiber and acid detergent fiber of the silage (P<0.05), while the contents of true protein increased significantly (P<0.05). In conclusion, the study obtained the optimum extraction process for the NCLP and found that NCLP had a positive effect on the fermentation quality of S. guianensis leaf silage, and the effect of 2% NCLP was better than that of 1% NCLP.

Key words: Neolamarckia cadamba leaf polyphenols, response surface methodology, silage quality