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1.碧螞1号品种纯度因生产条件而不同,土壤肥沃湿润、茬口好、播种适时的条件下,纯度高;反之则低。2.栽培条件不良所引致的越冬死亡率高低,是影响田间纯度的主要因素。死亡率高,单株分蘖少者纯度低;反之则高。3.由于栽培条件引起了不同品种单株生产率的差异,因之进一步影响了翌年群体中不同品种植株百分率的消长。4.在混杂群体中,红芒麦与碧螞一号两品种在不同条件下,取得优势的方式不同。在不利条件下,红芒类以生存力取胜,在优越条件下,碧螞一号以株粒数多取胜。5.本调查是根据农民经验进行的。前人研究结果可与本调查结果相印证。本调查还说明了栽培条件对品种纯度消长的人为干涉作用。提出了推广品种的群体适应问题,以及开展群众性选种对推广种进行再次选择、种好种子田,不只可以提高品种纯度,而且还能促进品种进一步适应的看法。
1. Bi Ma 1 varieties purity due to different production conditions, fertile soil moist, stubble good, timely sowing conditions, high purity; otherwise low. 2. Poor cultivation conditions caused by the level of overwintering mortality is the main factor affecting field purity. High mortality, fewer tillers per plant, low purity; otherwise high. 3. As the cultivation conditions caused the differences in the productivity of different varieties per plant, it further affected the growth and decline of the percentage of different varieties of plants in the following year. In the mixed population, the two varieties of red mangrove and Bi Ma one in different conditions, the advantages of different ways. Under adverse conditions, Hongmang class to survive, under the best conditions, Bi-a number of plants to win more grains. 5. The survey is based on farmers’ experience. The results of previous studies can be confirmed with the findings. This survey also illustrates the anthropogenic interference of cultivated conditions on species purity and decline. Proposed to promote the variety of groups to adapt to the problem, as well as the development of mass selection of popularized species to re-select, planting seed fields, not only can improve the purity of varieties, but also to promote further adaptations of species view.