Study on Vineyard Management of Golden Muscat Grapevine
|Keywords:||葡萄園;管理;金香葡萄;芽體分化;結實潛能;葡萄產業研究與發展研討會專集;Vineyard;management;Golden Muscat grapevine;bud differentiation;fruiting potential;Proceedings Of A Symposium On Grape Industry Research And Development||Issue Date:||Dec-1988||Publisher:||台中：農業試驗所||Start page/Pages:||67-79||Source:||葡萄產業研究與發展研討會專集:||Abstract:||
The progressive bud differentiation and fruiting potential of bud 2 to bud 9 on new fruiting shoot of Golden Iviuscat grapevine at Er-un town were inspected by stereomicroscope in order to find a way to improve the wine quality of Golden Muscat by forcing culture. It was found that bunch primordia commenced within 45 days after bud burst in spring, coinciding with flowering period, and maximized in number with another 30 and 60 days for basal 5 nodes and node 6-8, respectively, but the primordia did not develop into full size until July 15.
The highest number of bunch primodia is obtained at bud 6, bud 7, bud 8 and bud 9 and the best size of the primodia is observed at node 6, node 7 and node 8, indicating the highest fruiting potential of these three nodes.
However the fruiting potential of these new shoots is generally low, and estimated to be only 10% of possibility to harvest 2 good crops a year 20% of possibility to harvest one good and one medium crops, 1096 chance of 2 medium crops, 30% only one medium crop and 30% no harvest at all, under forcing culture with current management system, Besides the heat summation is not enough for two good crops a year.
From the trial of harvesting only fall crop (Nov.), it is found that the extract of wine from fall fruit is 18-57% better than that from summer fruit. Mixing some fall wine into summer wine should greatly improve the quality of the latter, or, the low acid fruit of early fall crop alone can make wine with high quality and the high acid fruit of winter crop make high quality brandy.
It is also recommended to adopt new trellising and training system, such as Geneva Double Curtain and Lyre system etc., to improve the canopy of vineyard and get the maxium photosynthesis to give a good crop both in quantity and quality in summer.
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