南朝鲜冬夏和昼夜的温差较大,年降水量为日本的一半左右,7——8月降雨量占全年降水量的40——50%。以稻米为主食。水稻栽培的发展南朝鲜于1906年成立统监府劝业模范场,水稻栽培开始有了发展。自1971年选育出水稻新品种“统一”以后,近10年,以新品种选育为主的水稻栽培技术有了更大的发展。水稻种植面积稳定在120万公顷左右。一.品种变化。水稻品种变化大体分为4个时期。1910年以前以地方品种为主;1920——1945 South Korea has a large temperature difference between winter and summer and day and night, with annual precipitation of about half that of Japan. July-August rainfall accounts for 40% -50% of annual precipitation. The staple food is rice. The development of rice cultivation South Korea established in 1906 government supervision model field farm, rice cultivation began to develop. Since 1971, a new rice variety “unified” has been bred. In the recent 10 years, rice cultivation techniques based on selection and breeding of new varieties have been greatly developed. Rice planting area stabilized at about 1.2 million hectares. A variety of changes. Rice varieties generally divided into four periods. Before 1910 to local varieties; 1920-1945