论文部分内容阅读
牡丹江1号是我市大白菜主栽品种。经过多年种植,种子纯度有所下降。我所大白菜课题组对此良种进行提纯复壮,以保持该品种优良种性。我们的主要做法是: 1.选标准型单株留母根。要求株高40厘米,开展度为80～85厘米,单株重为5斤左右的,同时要有细纹皱褶,顶部为尖闭型的,有严重霜霉病(二级以上的)和有毒病的病株不入选,有地蛆的根子不要。 2.在莱田群体中单株选时,不选涝洼地块。因为土壤水分含量大,菜球易裂伤,根须窖
Mudanjiang No. 1 is the main varieties of Chinese cabbage. After years of planting, the purity of the seeds declined. Chinese cabbage research group to purify this seed to recuperate, in order to maintain the variety of superior species. Our main approach is: 1. Select the standard type of single plant stay root. Requires 40 cm plant height, the degree of development of 80 to 85 cm, weight of about 5 pounds per plant, at the same time have fine wrinkles, the top of the tip closed type, severe downy mildew (more than two) and Toxic strains are not selected, there is no maggot roots do not. 2. When selecting individual plants in the Leitian group, do not choose a waterlogged depression. Because the soil moisture content, vegetable ball easy to laceration, root cellar