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国外对果树、蔬菜等经济作物的防霜比较重视,在实践中注意因时因地选用多种方法,以求达到收效大,成本低。防霜技术有以下几类。 一、加热法 果园加热炉是比较广泛采用的,在美国加利福尼亚州的柑桔产区最普遍,市场上有各种类型的加热炉出售,以石油为燃料(例如4份重油掺1份汽油)。其
Foreign countries pay more attention to the frost protection of economic crops such as fruit trees and vegetables. In practice, they pay attention to choosing a variety of methods for reasons of time, in order to achieve large benefits and low costs. Anti-frost technology has the following categories. First, the heating method Orchard heating furnace is more widely used in the United States, California, the most common citrus producing areas on the market there are various types of heating furnace for sale, with petroleum as fuel (for example, 4 copies of heavy oil mixed with 1 petrol) . its