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| Effects of picking period on physicochemical characteristics of |
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| DOI： |
| KeyWord:picking period Jinlong 2 walnut physicochemical characteristics |
| FundProject:中央财政林业科技推广示范项目（2019ZYTG1）；陇原青年创新创业人才项目 |
| Author Name | Affiliation | | 1.Longnan Economic Forest Research Institute, Wudu 746000, Gansu, China; 2.Gansu Walnut
Engineering Technology Research Center, Wudu 746000, Gansu, China;
3.Olive Research Institute,Wudu 746000, Gansu, China | 1.Longnan Economic Forest Research Institute, Wudu 746000, Gansu, China
2.Gansu Walnut
Engineering Technology Research Center, Wudu 746000, Gansu, China
3.Olive Research Institute,Wudu 746000, Gansu, China) |
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| Abstract: |
| In order to explore the optimum picking period of Longnan Jinlong 2 walnut, the Jinlong 2 walnut was collected at seven picking periods (July 24th, July 31th, August 7th, August 14th, August 21th, August 28th, and September 4th, 2020), and the main physicochemical characteristics such as phenotypic characteristics, kernel rate, moisture content and oil content(dry basis) of walnut kernel, and fatty acid composition and content of walnut oil were measured. The results showed that with the delay of the picking period, the green fruit weight, wet fruit weight, kernel fresh weight and kernel dry weight increased at first and then decreased and tended to be stable, and the moisture content of walnut kernel gradually decreased, the oil content(dry basis) gradually increased at first and then tended to be stable, and the kernel rate increased gradually and then decreased slightly, which indicated that delaying the picking period was beneficial to increase the yield of walnut and guarantee good quality of walnut kernel. The picking period had no effect on the fatty acid composition of walnut oil, but there were differences in the fatty acid content in different picking periods. The content of fatty acids in walnut oil in descending order was linoleic acid＞oleic acid＞linolenic acid＞palmitic acid＞stearic acid＞eicosenoic acid. According to the comprehensive score of the main components, the oil of Jinlong 2 was at a better level on September 4th. |
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