美国加州索诺马县的乔治·马克莱欧德利,用去除二次枝等手段,在总产量没有降低的情况下,使葡萄的含糖量提高了1度。为了提高葡萄含糖量,在83年,他减少了七月份的浇水,这样做也确实使葡萄含糖量有所提高。他还设计了一种新的树形,这种树形能使树体充分受光,每天至少有三分之一的时间可以使树体的每一部分得到光照,其树形很开张,树上枝条不多,树势也 George Makeleidley of Sonoma County, California, USA, removed the secondary shoots and increased the sugar content of the grapes by one degree without reducing the overall yield. To increase the sugar content of grapes, he reduced the watering in July in 83 years and in doing so did indeed increase the sugar content of the grapes. He has also devised a new tree shape that gives the tree full light and at least one-third of every day light up every part of the tree, with a very open tree, Not much, tree potential also