以新鲜菜心为试材，采用双向拉伸聚丙烯膜（Biaxially Oriented Polypropylene，BOPP）及低密度聚乙烯薄膜（Low density polyethylene，LDPE）高氧（>80%）环境下进行包装，研究菜心在4 ℃下包装袋内气体成分、营养品质、抗氧化活性及木质素含量等方面的变化。结果表明，在贮藏期间，高氧包装可有效延缓呼吸速率的快速升高，加快总酚含量的上升，提高菜心抗氧化能力，贮藏8 d时，BOPP-H包装及LDPE-H包装总酚含量比对照组分别高了1.75%和6.27%；在贮藏早期刺激了过氧化氢酶（CAT）酶活性、贮藏后期提高了超氧化物歧化酶（SOD）酶活性，减少了H2O2积累，降低了木质素合成；贮藏8 d时BOPP-H包装及LDPE-H包装木质素含量比对照组分别低了5.70%和1.43%，LDPE-H包装比BOPP-H包装低了2.40%。综合以上结果表明，高氧包装有利于菜心的贮藏保鲜，且LDPE-H包装比BOPP-H包装能更有效地维持总酚含量、减少木质素合成。

Using fresh non-heading Chinese cabbage as the test material, and biaxially oriented polypropylene film (BOPP) and low-density polyethylene (LDPE) for the packaging of fresh non-heading Chinese cabbage under a high oxygen (>80%) environment, the changes in gas composition of the packaging bag, and the nutritional quality, antioxidant activity and lignin content of the fresh cabbage stored at 4 ℃ were examined. The results showed that during storage, high-oxygen packaging could effectively retard the rapid increase of the respiration rate of cabbage, accelerate the increase in total phenolic content of cabbage, and increase the antioxidant capacity of cabbage. On the 8th day of storage, the total phenolic contents of the cabbage packed by BOPP-H and LDPE-H were 1.75% and 6.27% (both were higher than that of the control group). In the earlier storage stage, the activity of catalase (CAT) was stimulated to increase, while in the late storage stage, the activity of superoxide dismutase (SOD) increased, the accumulation of H2O2 decreased, and synthesis of lignin was reduced. On the 8th day of storage, the lignin contents of the cabbage packed by BOPP-H and LDPE-H were 5.70% and 1.43% (both were lower than that of the control group), with that of LDPE-H packaging being 2.40% lower than that of BOPP-H packaging. The above results indicate that high-oxygen packaging is beneficial to the storage and preservation of cabbage, and LDPE-H packaging can maintain the total phenol content and reduce lignin synthesis more effectively than BOPP-H packaging.

国家自然科学基金项目（31671912&31901756）；广东省农业科学院院长基金（202012）；广东省农业科学院新兴学科团队建设项目（201805XX）；广东省重点领域研发计划项目（2019B020222001）