密度和氮肥运筹对超高产小麦产量和群体质量的影响

Effects of different densities and nitrogen application techniques on yield and population quality of super-high-yield wheat

以烟农19和西农979为试验材料,采用裂裂区设计,研究3种密度和3种氮肥基追比对超高产小麦产量和群体质量的影响。结果表明,在产量≥9000kg.hm-2中,烟农19成熟期有2个处理茎蘖数分别达621.71×104hm2和650.66×104hm2,成穗率分别为39.53%和41.73%,灌浆末期的LAI分别达0.95和1.13,成熟期的干物质积累分别为16925.37和17419.75kg.hm-2;西农979成熟期的茎蘖数达647.76×104hm2,成穗率为43.49%,灌浆末期的LAI达1.11,成熟期的干物质积累为18937.85kg.hm-2。

Using Yannongl9 and Xinong979 as material,with split-split plot design,we studied the effects of 3 densities and 3 ratios of base and top-dressing nitrogen fertilizers on the yield and population qualities of super-highyield wheat. The results showed that： the tiller number at maturity are 621.71×10^4 hm-2 and 650. 66×10^4 hm-2 , the panicle setting rates are 39.53% and 41.73% ,the LAIs at late filling stage are 0.95 and 1.13 ,the dry matter accumulation are 16 925.37 kg·hm^-2 and 17 419.75 kg·hm^-2 for Yannongl9; the tiller number at maturity is 647.76 ×10^4 hm^-2 ,the panicle setting rate is 43.49% ,the LAI at late filling stage is 1.11, the dry matter accumulation is 18 937.85 kg·hm^-2 for Xinong979.