论文部分内容阅读
日本的甜菜种植区主要分布在气候冷凉的北海道。总播种面积74,000公顷,1980年平均单产58吨/公顷,含糖15％。纸筒育苗移栽是这个国家的主要栽培方式,占总面积的85%。全国有三大甜菜制糖公司,九座糖厂,均采用世界最先进的设备和加工技术,日处理量在1,800吨以上。以北海道农业试验场为中心共有甜菜科研机构十八所,分别承担甜菜栽培、育种、病虫害防治、生产过程机械化等研究项目。几年来育种部门利用杂种优势和细胞质遗传雄性不育性选育出了具有丰产、高
Beet cultivation areas in Japan are mainly located in cold Hokkaido. The total sown area is 74,000 hectares. In 1980, the average yield was 58 tons / hectare and the sugar content was 15%. Paper tube seedling transplanting is the country’s main cultivation methods, accounting for 85% of the total area. There are three sugar beet sugar companies in the country and nine sugar mills all using the world’s most advanced equipment and processing technologies with a daily processing capacity of over 1,800 tons. There are 18 beet research institutes centering on Hokkaido Agricultural Experimental Field, which bear the research projects of beet cultivation, breeding, pest and disease prevention and mechanization of production process respectively. Breeding departments in recent years, the use of heterosis and cytoplasmic male sterile breeding bred with high yield, high