日本和中国在寒地稻作技术上有差别,特别明显的有以下几个方面。 1.生育日数与无霜期中国常用日平均气温10℃以上的积温来表示自然条件的好坏,也惯用“无霜期”这个词。这作为观察自然条件好坏的表现方法是很重要的。中国对水稻品种的特性,强调“品种的生育日数”。与此相反,日本则重视品种的“安全出穗期”。因 Japan and China are technically different in the cold paddy fields, especially in the following aspects. 1. The number of days of birth and frost-free period The daily accumulated temperature above 10 ℃, which is commonly used in China, indicates the nature of the environment, and the term “frost-free period” is also used. This is important as a means of visualizing the quality of natural conditions. China’s characteristics of rice varieties, emphasizing “the number of breeding days.” In contrast, Japan places emphasis on the “safe hauling period” for breeds. because