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随着农业生产的发展,肥水条件的改善,高产麦田经常由于生长旺盛造成倒伏,这是当前高产田最大的威胁之一。因此,适当减小密度,选用株型矮、秆粗、粒重的大粒型品种,是当前小麦增产稳妥、有效的途径。长期以来被人们认为青藏高原冷凉地区才有大粒型小麦(因为气候凉爽,灌浆期长,千粒重高)。但近年来在育种工作者的努力下,在一些非冷凉区、灌浆期短、甚至日照短的地区,先后培育出一大批大粒型品种,获得高产。由此可见,根据各地不同气候特征,可以培育出适合本地区的大粒型品种。为了寻求大粒型品种在光合物质生产上的特性,我们自1981年起,选用了18个大粒
With the development of agricultural production, improvement of fertilizer and water conditions, high-yield wheat fields often lodging due to vigorous growth, which is one of the greatest threats to the current high-yielding fields. Therefore, proper reduction of density, selection of plant type dwarf, culm coarse, grain weight of large grain varieties, is the current wheat yield a safe and effective way. It has long been known that there are large-grain wheat in the cool areas of the Tibetan Plateau (because of the cool climate, long grain filling period, and high grain weight). However, in recent years, thanks to the efforts of breeding workers, a number of large grain-type cultivars have been cultivated in some non-cool areas, with short filling periods and even short sunshine and high yield. This shows that, according to different climate characteristics around the region, can cultivate suitable for the region’s large grain varieties. In order to seek the characteristics of large grain varieties in the production of photosynthetic material, we have selected 18 large grains since 1981