氯苯胺灵对马铃薯亚常温发芽及品质的影响

Effect of Isopropyl N-(3-Chlorophenyl) Carbamate Treatment on Sprouting and Quality of Potatoes Stored at Sub-ambient Temperatures

为明确氯苯胺灵[isopropyl N-(3-chlorophenyl)carbamate,CIPC]处理对马铃薯块茎12℃亚常温贮藏期间发芽及品质的影响,以费乌瑞它马铃薯为试材,研究12℃亚常温下,质量浓度为0.3 g/kg CIPC处理后块茎贮藏150 d的发芽情况、营养品质及动态残留,并与4℃低温和12℃亚常温贮藏效果进行对比。结果表明,与4℃低温对照相比,12℃+0.3 g/kg CIPC处理减缓了块茎内淀粉向还原糖的转化,同时保持了可溶性蛋白含量;与12℃亚常温对照相比,12℃+0.3 g/kg CIPC处理显著抑制了块茎呼吸强度、降低发芽和鲜重损失,且对块茎营养品质有积极的保持作用;短期贮藏30 d后薯皮和薯肉中CIPC残留量均低于残留限量标准(30 mg/kg)。因此,0.3 g/kg CIPC可作为12℃亚常温下马铃薯长期贮藏高效的抑芽剂使用。

To investigate the effects of isopropyl N-(3-chlorophenyl)carbamate(CIPC)treatment on sprouting and quality preservation of potato tubers during sub-ambient temperature storage at 12 ℃,the Favorita potato cultivar was chosen as the test material,and changes in germination and nutritional quality of potato tubers sprayed with 0.3 g/kg of CIPC and its dynamic residue were evaluated after storage at 12 ℃ for 150 d. Unsprayed tubers stored for the same period at 4 ℃ and 12 ℃ were assessed as controls. The results indicated that 12 ℃ +0.3 g/kg CIPC treatment ameliorated the speed of starch conversion to reducing sugar while maintaining soluble protein content in potato tubers better than the control group at 4 ℃. CIPC treatment at 12 ℃ also significantly inhibited tuber respiratory intensity,reduced sprouting and weight loss,and preserved tuber nutritional quality better than the unsprayed group stored at 12 ℃. CIPC residual contents in potato peels and tuber flesh were lower than the residue limit standard(30 mg/kg)after short-term storage for 30 d. In summary,0.3 g/kg CIPC treatment can be used as a high-efficiency,sprout suppressant for long-term storage of potato tubers at the sub-ambient temperature of 12 ℃.