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首页> 外文期刊>Canadian Journal of Plant Science >The concentration of yeast assimilable nitrogen in Merlot grape juice is increased by N fertilization and reduced irrigation
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The concentration of yeast assimilable nitrogen in Merlot grape juice is increased by N fertilization and reduced irrigation

机译：梅花葡萄汁中酵母可染色氮的浓度增加，施肥和降低灌溉增加

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Hannam, K. D., Neilsen, G. H., Forge, T. and Neilsen, D. 2013. The concentration of yeast assimilable nitrogen in Merlot grape juice is increased by N fertilization and reduced irrigation. Can. J. Plant Sci. 93: 37-45. Vineyard management practices that can be used to elevate yeast-assimilable nitrogen (YAN) above the 140 mg N L-1 required for efficient fermentation are of critical interest. The effects of N fertilization and reduced irrigation frequency on grape juice YAN, fruit composition and yield were examined in a 5-yr study on Merlot (Vitis vinifera L.) vines. Fertilization with N increased the concentration of YAN in grape juice by improving grapevine N status as indicated by petiole N concentrations. Reduced irrigation frequency appeared to have no effect on grape juice YAN status but short-term reductions in the quantity of applied water during the early stages of berry development in 2 of the study years did increase YAN. Juice pH was sometimes increased by reduced irrigation and N application treatments, but levels remained acceptable for wine production. Other measures of fruit composition were less sensitive to irrigation and N fertilization treatments. Inter-annual variability played an important role in determining grape juice YAN, fruit composition and yield. Future work should focus on refining management practices, e.g., the timing of N application, to minimize the effects of annual variability on grape juice YAN concentrations.
机译：汉坦，K.D。，Neilsen，G. H.，Forge，T.和Neilsen，D. 2013。梅洛葡萄汁中的酵母可分化氮的浓度增加了氮肥，降低灌溉。能。 J.植物SCI。 93：37-45。可用于升高酵母可编集的氮（燕）以上的葡萄园管理实践，高于有效发酵所需的140mg N L-1具有批判性兴趣。在梅洛（葡萄球菌L.）葡萄藤的5 yr研究中，研究了N施肥和降低灌溉频率对葡萄汁，果实组成和产量的影响。通过改善叶片N浓度所示，通过改善葡萄汁的葡萄汁中的葡萄汁中的施肥增加。降低的灌溉频率似乎对葡萄汁的情况没有影响，但在研究岁月的2年浆果发育早期阶段的施加水量的短期减少确实增加了yan。通过减少灌溉和N施用治疗，果汁pH有时会增加，但葡萄酒产量仍然可接受水平。其他果实组合物的措施对灌溉和施肥治疗较小。年间变异性在确定葡萄汁，果实组成和产率方面发挥了重要作用。未来的工作应专注于炼油管理实践，例如，N申请的时间，以尽量减少年度变异对葡萄汁浓度的影响。

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