摘要:
以宜优673为材料,通过分期播种试验,研究不同播期对水稻生育期、株叶形态及产量构成因素的影响。结果表明,随水稻播期推迟,水稻生育期缩短,主茎叶片数减少,植株高度降低;从产量构成因素看,随水稻播期推迟,有效穗减少,结实率增加,穗粒数先增后减。宜优673播种的最佳时期为5月20日,株叶形态好,穗大粒多,产量最高。5月1日播种,产量较高,但此期植株高度偏高,存在倒伏风险,栽培上应注意科学肥水管理,适时烤田,促控结合,养根壮杆,增强抗倒伏能力。
Abstract:
Interval sowing experiment was executed with Yiyou 673 as testing material to explore the effects of different sowing time on the growth period, plant and leaf morphology and yield components. The results showed that the growth period of rice was shorten, the number of main stem leaves was reduced and the plant height was decreased with the delayed sowing date. At the same time, the number of effective panicles was reduced, while the seed setting rate was increased, and the grains per spike were firstly ascended and then declined gradually. Optimum sowing time for Yiyou 673 had been confirmed on 20th May, it had good plant and leaf morphology, big panicle with more grains and the highest yield. Yiyou 673 could gain higher yield for sowing on 1st May, but it would have lodging risk because of over high plant height in this period. Therefore, we should pay attention to strengthen the scientific cultivation of fertilizer management, drain paddy fields timely, combine the promotion and control, develop strong roots and stalks so as to enhance the capacity of lodging.
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