连麦6号产量对播期和施氮比例互作的响应

Response of grain yield of Lianmai 6 to the interaction between sowing date and application rate of nitrogen

为探明播期与施氮比例互作对连麦6号产量及生长发育的调控效应,2015-2016年在连云港市农业科学院东辛试验基地,以中强筋品种连麦6号和强筋对照品种烟农19为试验材料,设置2个播期水平(10月19日和11月9日)和3个施氮比例(70∶10∶20∶0、50∶10∶20∶20和30∶10∶30∶30),研究播期和施氮比例互作对稻茬小麦连麦6号产量及生长发育的影响。结果表明,推迟播期,连麦6号和烟农19籽粒产量、穗数、LAI及花后干物质积累量均显著下降;增加中后期施氮比例,连麦6号籽粒产量、穗数、LAI、干物质积累量和旗叶SPAD值等均不同程度升高。综合来看,连麦6号在10月19日前后播种,30∶10∶30∶30施氮比例下可实现较高的产量与群体质量。

To explore the influence of sowing date and application rate of nitrogen on growth and grain yield of Lianmai6,the experiment was conducted on Dongxin experimental base of Lianyungang academy of agricultural sciences from 2015 to2016. The main objective was to study the influence of sowing date and application rate of nitrogen on growth and grain yield by using middle-strong gluten wheat(Lianmai 6) and strong gluten wheat(Yannong 19) as materials. The main results were as follows: with delaying of sowing date,the grain yield,ear,LAI and dry matter accumulation amount after anthesis of Lianmai 6 and Yannong 19 were all decreased significantly. By increasing application rate of nitrogen at middle and late growth stage,the grain yield,ear,LAI,dry matter accumulation amount after anthesis and the SPAD reading in flag leaves of Lianmai 6 were all increased. In conclusion,the higher grain yield and better group quality could be achieved when Lianmai 6 was sown on October 19 thand the application rate of nitrogen was 30 ∶ 10 ∶ 30 ∶ 30.