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小麦品种改良工作十分重要。近二十年来国外粮食总产量翻一番,究其原因约四分之一是扩大耕地面积的结果,四分之三则是单位面积产量的提高。在单产的提高中,不断更新和推广优良品种约起到30—35%的重要作用。科学家断言,培育高产、优质、抗病、早熟与适应性广的小麦新品种,是提高小麦单产最有效的途径,例如美国育成“盖恩斯5号”高产小麦良种后,一九七五年在约70亩面积上获得了平均单产2,010斤的好
Wheat variety improvement is very important. Over the past two decades, the total foreign grain output has doubled. The reason is that about one quarter of the total output of cultivated land has increased. Three-quarters of the total output has been increased per unit area. In the improvement of yield, continuous improvement and promotion of fine varieties of about 30-35% play an important role. Scientists assert that cultivating new varieties of wheat with high yield, high quality, disease resistance, early maturity and adaptability is the most effective way to increase wheat yields. For example, after the United States bred the “Gaines 5” high-yielding wheat variety, the United States in 1975 In the area of about 70 acres received an average yield of 2,010 catties good