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为了研究半矮秆大豆的产量潜力,探索半矮秆大豆窄行密植高产栽培技术,以半矮秆大豆新品种北豆25为材料,在45 cm垄作条件下,设30万株/hm2、36万株/hm2、42万株/hm2、48万株/hm24个密度,研究产量和密度关系。结果可以看出,百粒重、单株荚数和单株粒数随着密度的增加逐渐减小;随着密度增加株高、底荚高度、主茎节数呈现逐渐增加的趋势;42万株/hm2和36万株/hm2产量与对照比较达到极显著水平,30万株/hm2和48万株/hm2条件下产量与对照差异不显著;随着密度增加大豆产量呈现先增加后减少的单峰曲线,42万株/hm2产量达到最高值,获得3 208.9 kg/hm2产量水平;结合产量与考种结果可以看出42万株/hm2为北豆25最佳群体结构。
In order to study the yield potential of semi-dwarf soybean and to explore the narrow-row, close planting and high-yielding cultivation techniques of semi-dwarf soybean, the new semi-dwarf soybean variety “Beidou 25” was used as the material and under the conditions of 45 cm ridge planting, 300000 plants / Million / hm2,42 million / hm2, 480000 / hm24 density, the relationship between yield and density. The results showed that 100-grain weight, pods per plant and grain number per plant decreased with the increase of density. With the increase of plant height, height of pod and height of main pods, the number of main stems tended to increase gradually. Hm2 and 360,000 plants / hm2 reached the extremely significant level compared with the control. The yield of 300,000 plants / hm2 and 480,000 plants / hm2 had no significant difference with the control. With the increase of density, the soybean yield increased first and then decreased The results showed that 420,000 plants per hm2 peaked at 3 208.9 kg / hm2, and 420,000 plants per hm2 was the best population structure of Peony25.