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考察了栽植密度、播期对广两优5号产量形成的影响。结果表明,广两优5号栽植密度为22.5万穴/hm2、播期在4月25日产量最高。广两优5号随栽植密度增大,茎蘖数峰值提高、有效穗数增多、每穗实粒数减少;随播期推迟,该组合分蘖峰值滞后,无效分蘖增多、穗实粒数减少。4月25日后播种、栽植密度22.5万穴/hm2时,广两优5号产量最高可达753.3 kg/667 m2;5月5日及以后播种,广两优5号产量显著降低。广两优5号在湖北省种植适宜播期为4月中下旬,栽植密度应保持22.5万穴/hm2。
The effects of planting density and sowing date on the yield formation of Guangliangyou 5 were investigated. The results showed that the planting density of Guangliangyou 5 was 225,000 / hm2, and the sowing date was the highest on April 25. With the planting density increasing, the number of tillers and tillers increased, the number of effective panicles increased, and the number of seed grains per panicle decreased. With the delay of sowing date, the tiller peak lag, the number of ineffective tillers and the number of panicles decreased. After sowing on April 25 and planting density of 225,000 / hm2, the yield of Guangliangyou 5 was up to 753.3 kg / 667 m2. After sowing on May 5 and later, the yield of Guangliangyou 5 was significantly reduced. Guangliangyou 5 is suitable for sowing in Hubei Province in late April and planting density should be 225,000 / hm2.