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为提高羊尾巴的利用价值，运用真空抽提法从苏尼特羊羊尾巴中提取羊尾油,并对其进行理化性质的测定。另外，将羊尾油进行干法分提，分为固脂、液油两部分，采用气相色谱-质谱法对原油、固脂与液油脂肪酸组成进行分析。结果表明：苏尼特羊尾油的水分及挥发物含量为8.63%，酸值（KOH）为0.67 mg/g，皂化值（KOH）为180.1 mg/g，碘值(I)为45.48 g/100 g；3种油样都检测出16种脂肪酸，主要含有棕榈酸、油酸和硬脂酸，液油的不饱和脂肪酸含量较原油和固脂的高。 In order to improve the utilization value of sheep tail, the oil was extracted from Sunite sheep tail by vacuum extraction method, and its physicochemical properties were determined. The sheep tail oil was separated into solid fat and liquid oil by dry fractionation, and the fatty acid compositions of the crude oil, solid fat and liquid oil were analyzed by gas chromatography-mass spectrometry. The results showed that the moisture and volatile matter content of Sunite sheep tail oil was 8.63%, acid value was 0.67 mgKOH/g, saponification value was 180.1 mgKOH/g, and iodine value was 45.48 gI/100 g. A tatal of 16 fatty acids were detected in the three kinds of oils, and the main fatty acid was palmitic acid, oleic acid and stearic acid. The content of unsaturated fatty acids in liquid oil was higher than that in the crude oil and solid fat.

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Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

We used Xinong 9940 and Qianku 3 as materials to set three nitrogen fertilizer treatments levels(N1)90,(N2)180,( N3)270 kg·hm-2, to discuss the effects of different nitrogen application rates on the growth, dry matter accumulation and transport of vegetative organs and nitrogen application rate on grain filling characteristics and yield of two Tartary buckwheat. The results were as follows.(1)Nitrogen fertilizer significantly promoted the growth and development of Tartary buckwheat. With the increase of nitrogen application, the plant height, SPAD value and dry matter accumulation of Tartary buckwheat showed a gradual increase trend, reached the maximum value under N3 treatment, significantly higher than N1 and N2 treatment. Under the same nitrogen application conditions, Qianku 3 was better than Xinong 9940. As far as the translocation rate is concerned, the two varieties of Tartary buckwheat perform inconsistently. Nitrogen application significantly increased the stem and leaf dry matter transport rate of Xinong 9940, while Qianku 3 did the opposite.(2)With the increase of nitrogen application, the day of filling duration of Tartary buckwheat increased, the maximum grain filling date was prolonged, the mean grain flling rate decreased, and the 100-grain weight showed a downward trend. Under the same nitrogen applicaton conditions, compared with Qianku 3, Xinong 9940 had a fasted flling rate and greater grain weight.(3)With the increase of nitrogen application, yield and its constituent factors increased first and then decreased, but the varieties were different. The yield of Xinong 9940 reached the highest in N2 treatment, which was 1 650.0 kg·hm-2,which was 45.6% and 28.2% higher than that of N1 and N3 treatments. The yield of Qianku 3 reached the highest in N1 treatment, which was 616.7 kg·kg-2, which increased yield by 12.8% and 51.6% compared with N2 and N3. It was suggested that in the dry farming area of the Loess Plateau, buckwheat breeding and planting depend on the variety of buckwheat, and the optimum amount of nitrogen application should be selected, and the best nitrogen rate of Xinong 9940 was 180～270 kg·hm-2, and the optimum nitrogen rate of Qianku 3 was 90～180 kg·hm-2. [ABSTRACT FROM AUTHOR]

Copyright of Food Research & Development is the property of Food Research & Development Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Natural Resources / Ziran Ziyuan Xuebao is the property of Journal of Natural Resources and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)