论文部分内容阅读
泾源县地处六盘山南麓,气候湿润凉爽,是马铃薯生产的优势地区。全县播种面积每年2～3万亩,占粮食面积的16.6%,总产量4000万斤左右。近年来由于多种病毒和细菌性病害的侵染,导致马铃薯感病严重,特别是黑胫病、环腐病、病毒病等,使薯块变小,品质变劣,产量逐年下降,最低年份亩产仅1000斤左右。前几年,曾采用异地调种方法,但只能增产1～2年,经济效益不显著。1982年引进脱毒四代种薯六个品种,其中3个品种亩产3582～3876斤,比未脱毒田增产30～76.6%。1983年开始假植四个品种脱毒小苗4000株,收获后于1984年在城关五队推广3.8亩,亩产3840～4160斤,比未脱毒田增产43～106%。1985年全县脱毒薯种植面积35亩,平均亩产5200斤,比
Jingyuan County is located in the southern foot of Liupanshan, humid and cool climate, potato production is the advantage of the region. County sown area of 2 to 3 million mu per year, accounting for 16.6% of food area, the total output of 40 million kilograms. In recent years due to a variety of viruses and bacterial diseases, leading to serious susceptibility to potatoes, especially black shank, ring rot, virus disease, the potato pieces smaller, worse quality, production declined year by year, the lowest year Only about 1000 kg per mu yield. A few years ago, had used different methods of tune, but only an increase of 1 to 2 years, the economic efficiency is not significant. In 1982, six varieties of four generations of seedlings of detoxification were introduced, of which 3 varieties were yielding 3582-3876 kg per mu, an increase of 30-76.6% over that of non-detoxification crops. In 1983, four varieties of detoxified seedlings were planted with 4,000 seedlings. After harvesting, they were popularized 3.8 acres in Chengguan five teams in 1984, yielding 3840 ~ 4160 kg per mu, yielding 43 ~ 106% more yield than the non-detoxification field. In 1985 the county detoxified potato planting area of 35 mu, an average of 5200 pounds per mu, than