中国稻米

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不同超级稻品种对移栽密度的反应特性研究

  1. 1湖南农业大学农学院/南方粮油协同创新中心,长沙 410128;2湖南省桂东县农业科学研究所,湖南 郴州423503
  • 出版日期:2019-01-20 发布日期:2019-01-20
  • 通讯作者: 敖和军

Response Characteristics of Different Super Hybrid Rice Varieties to Transplanting Density

  • Online:2019-01-20 Published:2019-01-20

摘要:

为探明高产条件下不同超级稻品种对种植密度的反应特性,选用两优培九、Y两优1号、Y两优2号、Y两优900、超优1000等5个超级稻品种,以常规稻品种黄华占为对照,于2016年在湖南省郴州市桂东县进行小区试验。结果表明,两优培九、Y两优1号、Y两优900、超优1000均以高密度(24万丛/hm2)处理产量最高,分别为       11 469.33、13 438.75、11 125.56和11 969.35 kg/hm2,比低密度处理(12万丛/hm2)增产11.71%、9.41%、25.80%和9.90%,增产原因在于这4个品种在高密度种植下单位面积有效穗数较低密度和中密度处理分别高出40.76%和33.24%。Y两优2号在插植密度为12万丛/hm2时,有效穗数较高并且千粒重显著高于其他两种种植密度,因而有着较高的实际产量,达到11 172.44 kg/hm2。24万丛/hm2处理时所有超级稻品种齐穗期与成熟期干物质生产总量均较高;黄华占则在低密度下(12万丛/hm2)有着最高产量和干物质生产量。

关键词: 超级稻, 种植密度, 产量, 产量构成, 干物质

Abstract:

In order to find out the response characteristics of different super hybrid rice varieties to planting density under high yield condition in this sutdy, a field experiment was conducted in Guidong county in 2016 with 5 super hybrid rice varieties Liangyoupeijiu, Y Liangyou 1, Y Liangyou 2, Y Liangyou 900, Chaoyou 1 000 and conventional rice variety Huanghuazhan as materials. The results showed that the yield of Liangyoupeijiu, Y Liangyou 1, Y Liangyou 900, Chaoyou 1 000 were highest in the high density (24×104 hiles/hm2), which were 11 469.33 kg/hm2, 13 438.75 kg/hm2, 11 125.56 kg/hm2 and 11 969.35 kg/hm2, respectively, compared with the low-density treatment (12×104 hiles/hm2), the increase percent was 11.71%, 9.41%, 25.80% and 9.90%; the main reason for the effective panicle number per plant area of the treatment with high-density was higher than that in the low -density and middle-density. When the planting density was 12×104 hiles/hm2, the number of productive panicle was higher and the thousand grain weight was significantly higher than the other two planting densities, so Y Liangyou 2 had a higher yield, reaching 11 172.44 kg/hm2. And all the super hybrid rice varieties had high dry matter accumulation in heading and maturity. Under the experimental conditions, Huanghuazhan had the highest yield and dry matter production at low density.

Key words: super hybrid rice, planting density, yield, yield components, dry matter

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