LIANG Jian-qiu,YU Xiao-bo,ZHANG Ming-rong,et al.Effect of Various Chemical Treatments and Density on Agronomic Traits and Yield of Inter-planting Soybean Cultivar Nanheidou 20[J].Soybean Science,2018,37(06):876-882.[doi:1011861/jissn1000-98412018060876]
化控和密度对套作大豆南黑豆20农艺性状和产量的影响
- Title:
- Effect of Various Chemical Treatments and Density on Agronomic Traits and Yield of Inter-planting Soybean Cultivar Nanheidou 20
- Keywords:
- Intecripping; Density; Uniconazole; Agronomic trait; Yield
- 文献标志码:
- A
- 摘要:
- 在玉米-大豆带状带状套作模式下，为探寻大豆密度和烯效唑对大豆农艺性状和产量的影响，2016-2017年以高蛋白黑色保健大豆品种南黑豆20为材料，设置大豆密度90 000,120 000,150 000和180 000 株·hm-2共4个梯度，在大豆分枝期用烯效唑75 mg·kg-1喷施处理大豆。两年结果表明，随着大豆密度增加株高增加，茎粗降低；单株有效荚、单株粒数、单株粒重等产量构成因子降低；产量先增加后降低，以密度150 000 株·hm-2产量最高；经济系数也随密度增加逐渐降低。同时，烯效唑各处理的株高低于对照；茎粗、产量普遍比对照高，部分差异达到显著水平。结果表明：品种南黑豆20的最适宜套作密度为150 000 株·hm-2，在该密度下能达到较高产量。分枝期喷施75 mg·kg-1烯效唑能够一定程度上降低大豆株高，增加茎粗，从而提高产量。
- Abstract:
- To explore the effects of density and uniconazole on agronomic traits and yield of soybean in maize-soybean relay strip intercropping system, 2016 and 2017, high protein black health soybean cultivars Nanheidou 20 was planted at four densities (90 000,120 000,150 000 and 180 000 plants·ha-1) ,spraying uniconazole(75 mg·kg-1) at branching period in soybeanThe two years results showed that with the increase of the density of soybean, plant height increased and stem diameter decreased, yield components such as available pods, seeds number and seed weight per plant decreased. The yield increased firstly and then decreased, with the highest yield of 150 000 plants·ha-1, and the economic coefficient decreased with the increase of the densityAt the same time it was also found that plant heigh of the uniconazole treatment were lower than that of the control group,the stem diameter and yield were higher than that of the control group,part of difference reached significant levelThe results showed that 150 000 plants ·ha-1 is the most suitable intercropping density of Nanheidou 20,which can achieve a higher yield in the densitySpraying uniconazole(75 mg·kg-1) at branching period can decreased plant height,increase the stem diameter to a certain extent, and therefore increase the yield of soybean
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备注/Memo
收稿日期：2018-01-24