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优良品种是指在一定地区和耕作条件下,能符合农业生产的需要,并具有较高的经济价值的品种。现在市场上销售的优良品种是指符合国家标准的大田生产用种。而且优质种子必须与良好耕作方法相结合,在同样的生态和耕作条件下使用了优良品种,才能使产量提高10%左右。由于优良品种各种性状较优,对常发生的病虫害和自然条件产生的危害都具有较强的抗逆性,在农业生产中可减弱或避免粮食产量的损失和品质变劣。但是任何优良品种都不是万能不变的,它的优良特性只是相对的。某个优良品种在甲地表现优良,而在乙地则不一定优良,在风调雨顺年份优良,而在逆境年份不一定优良。例如:黑河38号大豆是优良品种,它在雨
Good variety refers to a certain area and farming conditions, can meet the needs of agricultural production, and have high economic value of varieties. Now sold on the market of fine varieties is consistent with the national standard field production of species. And quality seeds must be combined with good farming practices, using good varieties under the same ecological and tillage conditions, to increase yields by about 10%. Due to the superior traits of fine breeds, they have strong resistance to pests and diseases that occur frequently and the damage caused by natural conditions, which can reduce or avoid the loss of grain yield and the deterioration of quality in agricultural production. But any good breed is not almighty, its goodness is only relative. A fine variety performs well in A, but not in B, which is good in good weather and not necessarily good in adversity. For example: Heihe 38 soybean is a good variety, it is in the rain