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近年来,随着科学技术的不断推陈出新,农作物高产品种也不断问世。广大农民积极引进新品种,使作物产量有了明显提高。但是也有许多农户不注意科学引种,出现了许多引种失败的实例。为了避免这个问题,在引种过程中应注意以下几个问题: 1、应该掌握当地的生育期,使新引进的品种在当地正常年景能确保充分成熟。一般应保证在霜前3—5天成熟,这样才能避免低温、早霜对作物产量的影响。 2、要选用抗逆性强的品种。即抗病、抗虫、抗倒伏。 3、要选用适应当地土壤、气侯及栽培条件的品种。土壤瘠薄、盐碱、干旱地区应引进耐瘠薄、耐干旱
In recent years, with the continuous innovation of science and technology, high-yield varieties of crops are also available. The broad masses of peasants have actively introduced new varieties, which have significantly improved their crop yields. However, many farmers did not pay attention to the introduction of science, and many failed to introduce examples. In order to avoid this problem, in the introduction process should pay attention to the following questions: 1, should grasp the local growth period, the newly introduced varieties in the local normal years to ensure full maturity. The general should ensure that mature 3-5 days before the frost, so as to avoid the impact of low temperature, early frost on crop yield. 2, to choose strong resistance varieties. That is disease-resistant, insect-resistant, lodging resistance. 3, to choose to adapt to the local soil, climate and cultivation conditions of the species. Soil infertility, saline-alkali, arid areas should be introduced resistant barren, drought-resistant