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杂交油菜是在秧苗三叶期及移栽前根据植株形态特征进行苗期纯度测定,并将实测得 F_1代秧苗与杂株秧苗分类设区栽入大田。分别与越冬期和盛花期追踪调查种植纯度,测定其吻合率。同时,提出了在杂交油菜种植过程中,应把好育苗去杂关,掌握在苗床三叶期或直播田定苗时,根据不同组合的植株形态特征,采取去小苗、留大苗;移栽前采取栽大苗、去小苗的保纯观点。
Hybrid rapeseed is measured at seedling stage according to the morphological characteristics of the plants before the three-leaf stage and before transplanting, and the F_1 generation of seedlings and the hybrid seedlings are plotted into the field. The purity of the plantation was traced with the overwintering and full flowering stages, respectively, and the coincidence rate was measured. At the same time, we put forward that during the process of hybrid rapeseed planting, we should take good nursery to go to miscellaneous customs and master the seedling in the three-leaf stage or direct seeding Tiandingmiao. Take the seedlings and the big seedling according to the different combinations of plant morphological characteristics; Planting big seedlings, pure seedlings to the point of view.