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在大搞农田基本建设、增施肥料、兴修水利、创造稳产高产田等生产条件不断改善的情况下,小麦高产的严重障碍之一是大面积倒伏问题。六十年代以来,我国及许多国家利用喷施矮壮素的办法防止倒伏,但这种措施有一定的局限性,经济上也不合算。近年来,许多国家把培育抗倒、耐肥、抗病的矮杆品种作为小麦育种的首要任务,而且选育出了一批矮杆(50-60公分)或半矮杆(70-80公分)品种,如墨西哥的“索诺拉64”、“诺瑞尔斯66”,苏联的“无芒一号”,美国的“格涅斯”等。墨西哥推广矮杆品种后,小麦单产由一百多斤提高
One of the serious obstacles to high yield of wheat is the issue of large-scale lodging under the conditions of vigorously promoting farmland infrastructural construction, increasing fertilizers, building water conservancy, and creating stable and high yield fields. Since the 1960s, China and many countries have used the method of spraying CCC to prevent lodging. However, this measure has some limitations and is economically not cost-effective. In recent years, many countries regard the cultivation of short-bar-resistant, resistant and disease-resistant varieties as the primary task of wheat breeding and have also bred a number of short bars (50-60 cm) or semi-short bars ) Varieties, such as Mexico’s “Sonora 64”, “Noel 66”, the Soviet Union, “No. 1,” the United States, “Ganesh” and so on. Mexico to promote dwarf varieties, the wheat yield increased by more than one hundred jins