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1 存在的主要问题 1.1 品种单一,种性退化严重统计表明豫麦18、皖麦19播种面积达60%左右。这些品种大部分已繁殖3～5代,种性退化严重,表现为穗型变小,穗粒数少,是制约高产的重要原因之一。 1.2 播种量大,管理粗放由于农民管理、施肥达不到高产技术要求,往往出现精播不增产甚至减产的情况。该区小麦早茬平均播量为195kg/hm~2左右,群体密度过大,加上管理粗放,
1 The main problems exist 1.1 Single species, serious degenerative species statistics Yumai 18, Wanmai 19 sown area of about 60%. Most of these cultivars have been propagated for 3 to 5 generations, with severe degenerative species, showing smaller panicles and fewer grains per spike, which is one of the important reasons for restricting high yield. 1.2 large seeding, extensive management As farmer management, fertilization fails to meet the requirements of high-yielding technology, often appear precision seeding does not increase production or even reduce production. The average yield of early wheat in this area is about 195kg / hm ~ 2, the population density is too large, with extensive management,