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生产实践和试验结果证明,“丹玉6号”是适于我区种植的高产杂交种,增产显著。其主要特点是,中晚熟,在1976年夏、秋气温偏低的情况下,生育期105天。株高240—260厘米,穗位中下。高100厘米左右。单株总叶数20片左右,穗位叶为15叶。成熟时茎叶青绿,叶片功能时间长,秆硬抗倒,抗大、小叶斑病。果穗整齐,穗大轴细,穗长约23厘米;穗粒行数16—18行,籽粒扁长,黄色,马齿型,千粒重250—300克。在中上等肥水条件下,每亩以3,000—3,500株为宜。缺点是苞叶较短,容易发生秃顶现象。为了充分发挥良种的增产潜力,做到良种良法配套,1976年我们对“丹玉6号”穗分化规律及其与根、茎、叶生长的对应关系进行了初步观察,以便为科学施肥和经济用肥提供依据。现将观察结果结合我区玉米考察情况分析总结如下,供参考。
Production practices and test results show that “Dan Yu 6” is suitable for planting high-yield hybrids in our region, a significant yield increase. Its main feature is, in the late maturity, in the summer of 1976, the autumn temperature is low, the growth period of 105 days. Plant height 240-260 cm, ear location in the next. About 100 centimeters high. The total number of leaves per plant is about 20, 15 leaf leaves position. Mature leaves and leaves green, leaf function for a long time, straw hard anti-down, resistance to large, leaf spot disease. Ears neat, large spike axis, spike length of about 23 cm; spike grain line number 16-18, the long, yellow, dent, grain weight 250-300 grams. In the best fertilizer and water conditions, 3,000-3,500 plants per acre is appropriate. The disadvantage is the bracts shorter, prone to bald phenomenon. In order to give full play to the yield potential of elite varieties, so good varieties of good law to support, in 1976 we “spike” No. 6 spike differentiation and its root, stem and leaf growth of the corresponding preliminary observations in order to scientific fertilization and economy Use fertilizer to provide the basis. The observations are combined with the situation in my area of corn inspection summarized as follows for reference.