不同机插密度对烟后稻产量和产量构成因素的影响

Effects of Different Mechanical Transplanting Densities on the Yield and Yield Components of Rice Planted After Tobacco

为了探明烟后稻最佳的机插密度,以广8优165为材料,采用单因素随机区组设计,开展不同机插密度对烟后稻生育期、农艺性状、产量和产量构成因素的影响试验。结果表明:机插密度为30cm×14cm (处理D)时产量最高,达10 152.0kg·hm^(-2),极显著高于30cm×21cm(处理A)、30cm×18cm (处理B)、30cm×12cm (处理E)。机插密度在15.873~23.805万穴·hm^(-2)范围内,随着栽培密度加大单位面积有效穗数显著增加,产量也相应提高,每穴穗数、每穗粒数、千粒重、结实率等因素却呈下降趋势;超出一定范围则栽插过密,就会影响产量提高。

In order to find the best mechanical transplanting density of rice planted after tobacco,by taking Guang 8 you 165 as the material,the effects of different mechanical transplanting densities on the growth period,agronomic traits,yield and yield components of rice planted after tobacco were studied by using the single factor random block design.The results showed that the maximum yield was 10152.0 kg·hm^(-2) when the mechanical transplanting density was 30 cm×14 cm(treatment D),which was significantly higher than that of 30 cm×21 cm(treatment A),30 cm×18 cm(treatment B)and 30 cm×12 cm(treatment E).When the mechanical transplanting density was in the range of 158730-238050 holes·hm^(-2),the number of productive ear per unit area increased significantly with the increase of planting density,and the yield also increased correspondingly,while the number of panicles per hole,the number of grains per panicle,the thousand kernel weight and the setting percentage decreased.If the mechanical transplanting density exceeded a certain range,when being planted too densely,the yield increase would be affected.