头季不同氮肥施用量对再生稻两优616干物质生产及产量的影响  

Effect of Nitrogen Fertilizer Amount on Dry Matter Production and Yield of Ratooning Rice Liangyou 616

作　　者：刘锋 LIU Feng(Youxi Agricultural Technology Extension Station,Youxi,Fujian 365100)

机构地区：[1]福建省尤溪县农业技术推广站,福建尤溪365100

出　　处：《福建稻麦科技》2021年第3期17-21,共5页Fujian Science and Technology of Rice and Wheat

摘　　要：研究以超级稻两优616为材料,设置头季4种不同施氮水平处理,即N0(对照,不施氮肥)、低氮N1(112.5 kg/hm^(2))、中氮N2(150 kg/hm^(2))和高氮N3(225 kg/hm^(2)),研究两优616作再生稻干物质积累及转运规律、产量及其构成因素。结果表明:在0~225 kg/hm^(2)氮肥用量范围内,两优616头季移栽至成熟期,干物质积累呈随着氮肥施用量增加而增加的趋势。头季成熟至再生季齐穗期3个处理干物质生产均较对照增加,增加幅度随氮肥施用量增加而降低。头季施用氮肥均显著增加两优616的头季产量,其中以N2处理的产量最高;再生季产量N1、N2处理比N0显著增加,但N3处理比N0显著降低。从产量构成来看,氮肥增加两优616头季的有效穗数和每穗粒数,但结实率和千粒重与N0差异不明显。产量与氮素施用量的回归分析表明,两优616头季最佳施氮量为194.4 kg/hm^(2)。Ratooning rice Liangyou 616 was used to study the effect of different nitrogen fertilizer application on dry matter accumulation and transportation,yield and its components.The field experiment was conducted with control(N0:0 kg/hm^(2)),low nitrogen(N1:112.5 kg/hm^(2)),medium nitrogen(N2:150 kg/hm^(2))high nitrogen(N3:225 kg/hm^(2)).Results showed that the dry matter accumulation at transplanting stage to maturity in main-crop was increased with nitrogen increasing.The dry matter accumulation of N1,N2,N3 treatments at heading stage in ratoon-crop were higher than N0 treatment,but were decreased with nitrogen increasing.Nitrogen application treatment raised grain yield of main-crop,N2 treatment had the maximum yield.Yield of N1,N2 treatment in ratoon-crop were higher than N0 treatment,but N3 treatment was decreased significantly.N1,N2,N3 treatment increased effective panicle number and spikelets number in main-crop,and seed setting rate,1000-grain weight were not significant difference with N0 treatment.the optimum nitrogen amount was 194.4 kg/hm^(2) by the linear regressive analysis.

关 键 词：再生稻 施氮量 干物质积累运转 增产效应 

分 类 号：S143.1[农业科学—肥料学] S511.062[农业科学—农业基础科学]