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| 播期后移对糯玉米新品种浚糯504物质生产与分配的影响 |
| Effects of Delayed Sowing Date on Biomass Production and Distribution in New Waxy Corn Variety ‘Xunnuo 504’ |
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| DOI： |
| 中文关键词: 浚糯504 播期 糯玉米 产量 干物质积累 |
| 英文关键词:Xunnuo 504 Sowing date Waxy corn Yield Dry matter accumulation |
| 基金项目:鹤财办预\[2021\]665号-鲜食玉米种质创新与新品种选育。 |
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| 摘要点击次数: 36 |
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| 中文摘要: |
| 播期是鲜食玉米种植过程中最重要的栽培因子，调节播期充分利用光温条件可以使鲜食玉米适期采收更好满足市场需求。本研究以浚糯504为试验材料，设置了5个处理（6月25日~8月4日，日期间隔为10 d），研究了播期对玉米生长发育、产量、物质生产与分配的影响。结果表明，随着播期推迟，糯玉米从出苗至理论采收期开始延迟，由播期1处理的70 d延长到播期4处理的75 d。不同播期处理的浚糯504物质生产能力差别明显，播期1处理浚糯504的单株干物质积累量为320.5 g，单株果穗干重为177.5 g随着播期推迟，干物质积累量变少，产量降低。播期5处理的单株总干物质量只有78.5 g，只有播期1处理的24.5%，达不到正常采收标准。综合考虑，鲜食糯玉米品种浚糯504宜在7月25日前完成播种。 |
| 英文摘要: |
| Sowing date is one of the most important cultivation factors in fresh corn production, as it directly affects biomass production and distribution in waxy corn. Adjusting the sowing date to better utilize light and thermal resources can facilitate timely harvest and better meet market demand. This study used ‘Xunnuo 504’ as the experimental cultivar and established five sowing date treatments (from June 25 to August 4 at 10-day intervals) to investigate the effects of sowing date on maize growth and development, yield, and biomass production and distribution. The results showed that delaying the sowing date prolonged the period from emergence to theoretical harvest, increasing from 70 days under the first sowing date treatment to 75 days under the fourth sowing date treatment. The biomass production capacity of ‘Xunnuo 504’ varied significantly among different sowing date treatments. Under the first sowing date treatment, the dry matter accumulation per plant was 320.5 g, and the dry weight per ear was 177.5 g. With further delay in sowing date, dry matter accumulation and yield both decreased. Under the fifth sowing date treatment, the total dry matter per plant was only 78.5 g, accounting for 24.5% of that under the first treatment, which was insufficient to meet normal harvest standards. Based on these results, the fresh waxy corn variety ‘Xunnuo 504’ should be sown before July 25. |
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