文献类型：期刊文献

英文题名：Effects of harvest time on the yield, quality and active substance of torreya grandis nut and its oil

作者：Wang, Yaping[1] Yao, Xiaohua[1] Yang, Liu[2] Fei, Xueqian[1] Cao, Yongqing[1] Wang, Kailiang[1] Guo, Shaohai[1]

第一作者：王亚萍

通信作者：Yao, Xiaohua|[a000562e8fb9dd506b270]姚小华;

机构：[1] Research Institute of Subtropical Forestry, Chinese Academy of Forestry [CAF], Hangzhou, ZJ, 311400, China; [2] Zhejiang Academy of Forestry, Hangzhou, ZJ, 310023, China

年份：2021

卷号：70

期号：2

起止页码：175-184

外文期刊名：Journal of Oleo Science

收录：EI(收录号：20210609901556);Scopus(收录号：2-s2.0-85100530987)

语种：英文

外文关键词：Harvesting - Unsaturated fatty acids - Quality control

摘要：Torreya grandis is an important economic tree species in China. It provides nutritional value and is important to the health care industry. There are ongoing issues with product quality which are primarily related to improper management and early harvest. This study was carried out during the fruit ripening processes to evaluate the influence of harvesting date on T. grandis quality, and to determine the optimal harvest period. The effects of harvest time on the variation of quality and nutritional parameters of T. grandis nuts and its oil were evaluated, and the optimal harvest period was determined. The results showed that harvest timing had a strong effect on both oil yield and quality. Prolonged ripening could induce higher levels of kernel rate, fruit inclusions, oil and nutritional quality. When the sample harvested in the mid-September, the kernel rate and oil content were increased by 1.88±0.31% and 6.65±0.47%, respectively, compared to samples harvested in the beginning of late-August. Similarly, the mid-September harvest resulted in total unsaturated fatty acids content of the oil being increased by 5.3±0.34%, the FFA and peroxide value being decreased by 40.7±0.15% and 76±0.08%, respectively, and total tocopherols and free amino acids were increased 7.5±0.24% and 47.3±0.15%, respectively, compared to the samples harvested on Aug. 25. The results indicated that the optimal harvest time of T. grandis fruits was mid-September as it was beneficial for improving the quality of T. grandis nut and its oil. It was suggested that T. grandis fruit should be harvested later. ? 2021 by Japan Oil Chemists’ Society.