优良品种在农业生产中起着重要作用,随着责任制的普遍实行,群众对良种更有迫切要求.为减少年年向外地引种所造成的人力、物力的浪费现象,并对已引进的良种作好保纯,防止退化,必须在麦收前抓紧有利时机作好选种留种工作,现提出几点意见供参考.1、片选:在小麦成熟前,可在具有代表性、肥力一致,生长良好的地块,进行片选.收获前除 The fine varieties play an important role in agricultural production, and with the universal implementation of the responsibility system, the masses have even more urgent requirements on the improved varieties. In order to reduce the waste of manpower and material resources caused by the annual introduction to other places, Make good pure, to prevent degradation, we must seize the favorable opportunity before the wheat harvest for species selection to stay kind of work, are making a few comments for reference .1, chip selection: Before the wheat maturity, in a representative, fertile, Well-grown plots for patch selection before harvest