论文部分内容阅读
在甘薯生产上,一般利用大田普通混杂株进行剪蔓繁殖。这种方法易导致种性退化,使产量降低。卢龙县石门镇刘庄坨村科技示范户杨占友,在中国科学院遗传研究所以凡教授的启示下,成功地运用了“优、大、速、密”单株繁殖法,既达到了提纯复壮的目的,繁殖系数又高,具有显著的增产效果。其具体作法是: 一、精选优良单株。于早霜前在春薯地里仔细观察地上部长相,选择具有本品种特征特性(叶片心脏形,叶脉紫红色,蔓短而粗,节密,分枝多)的优良单株,然后收取薯块,选纺锤形、结薯集中、无病害、整齐度高、薯皮红色、重量在0.5公斤以上的薯块做留种用。按此法最后入选的共3株。
In the sweet potato production, the general use of Daejeon common hybrid strains cut Man reproduction. This method easily lead to degenerative species, so that the yield decreased. Yangzhan You, a model laborer of Liuzhuang Tuo Village, Shimen Town, Lulong County, succeeded in using the propagation strategy of “superior, big, speed and dense” with the help of all professors from the Institute of Genetics, Chinese Academy of Sciences, both of which have reached the stage of purification and rejuvenation The purpose of high reproductive coefficient, with a significant increase in yield. The specific practices are: First, the selection of fine single plant. In early spring frost before carefully observed in the ground above the ground phase, select the characteristics of the species (leaf heart-shaped, purple veins, short and thick vine, section dense, branched and more) of the individual plants, and then take the potato , Selected spindle shape, tuber concentrated, disease-free, high degree of uniformity, red sweet potato, weighing more than 0.5 kg of potato to stay kind. According to this method the last selected a total of 3 strains.