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前言饲料芜菁作为冬季多汁饲料乳牛喜食,能摄入大量水分,沁乳效果极好。在温暖的旱田地区是这样,就是在寒冷地区也能经简易贮藏成为冬季重要的维生素和矿物质的来源。芜菁能在较短时间内收获,也比较容易与其它作物编入轮作体系。饲料芜青虽然有如此的重要性,但主要因为栽培费工,种植面积有渐减之势。据日本农林省统计,1977年维持在10800公顷(旱田九成,水田一成)到一万公顷。今后,由于撒播栽培等省力栽培法的确立,优良品种的普及等,栽培面积也将可能增大。1971年,生产能力,抗病性都很优良的中晚熟品种红芜菁已被农林省登记,但象这样一些品种,如果延迟播种期,产量就急剧
Preface Feed turnip as winter succulent feed cow feed, can intake a lot of water, Qin milk effect is excellent. This is the case in warmer upland areas, where winter storage of important vitamins and minerals can also be easily stored in cold regions. Turnips can be harvested in a relatively short period of time and are also relatively easy to incorporate into crop rotation systems with other crops. Although there is such a significant importance for the feedstuffs, mainly because of the cost of cultivation and cultivation, the area under cultivation has been declining. According to Japan’s Ministry of Agriculture and Forestry statistics, in 1977 maintained at 10,800 hectares (90% of paddy fields, 10% paddy fields) to 10,000 hectares. In the future, the cultivation area will also likely increase as a result of the establishment of labor-saving cultivation methods such as sowing and cultivation, the popularization of fine varieties and the like. In 1971, middle and late-maturing varieties of red turnip have been registered by the Ministry of Agriculture and Forestry, with good production capacity and disease resistance. However, if such varieties are delayed in sowing time, the yield will be sharp