9个白色酿酒葡萄品种在昌黎地区的引种试验初报

在昌黎地区,以国外引进的9个白色酿酒葡萄品种霞多丽、小芒森、赛美蓉、白诗南、长相思、雷司令、阿拉奈尔、维奥尼和胡桑为试材,2010～2012年连续3 a进行引种试验,对各品种从生长结果习性、抗病性、果实品质以及单品种白葡萄酒的理化品质和感官品质5个方面进行了分析与评价,以筛选出适宜昌黎地区种植且酿酒品质优异的白葡萄品种。结果表明:适宜昌黎地区种植的优质、抗病酿酒白葡萄品种有3个,其中,小芒森果实高糖高酸,适合酿造优质半甜或甜型白葡萄酒;阿拉奈尔和维欧尼适合酿造优质干白葡萄酒。

Global Existence and Pointwise Estimates of Solutions to Generalized Benjamin-Bona-Mahony Equations in Multi Dimensions

This paper is concerned with the global existence and pointwise estimates of solutions to the generalized Benjamin-Bona-Mahony equations in all space dimensions.By using the energy method, Fourier analysis and pseudo-differential operators, the global existence and pointwise convergence rates of the solution are obtained. The decay rate is the same as that of the heat equation and one can see that the solution propagates along the characteristic line.