氮素营养水平对2种穗型冬小麦品种籽粒灌浆及淀粉特性的影响

在大田高产栽培条件下,研究了不同施氮水平对大穗型品种兰考矮早八和多穗型品种豫麦49-198籽粒灌浆及淀粉特性的影响。结果表明:2种穗型冬小麦品种灌浆期间籽粒干物质积累及灌浆速率均随灌浆进程推进呈增加的趋势。氮素营养水平对2种穗型冬小麦品种的籽粒灌浆及淀粉特性影响效应不同,大穗型品种兰考矮早八以N3处理(270 kg/hm2)的干物质积累量及灌浆速率最大,而多穗型品种豫麦49-198则随施氮量的增加而有下降的趋势,但各处理间差异不显著。随施氮量的增加,大穗型品种兰考矮早八淀粉粘度参数均呈增加的趋势,且以N3处理的值最大,并且各处理之间的差异均达显著水平;多穗型品种豫麦49-198的糊化参数也随施氮量的增加呈增加的趋势,峰值粘度和低谷粘度均以N2处理(180 kg/hm2)的值较高,但各处理间差异不明显。

Effects of Nitrogen Nutrition on Grain Filling and Starch Properties of Two Winter Wheat Cultivars with Different Spike Types

Under the field experimental conditions,effects of nitrogen fertilizer on grain filling and starch properties was studied by using two winter wheat cultivars,Yumai 49-198,a multi-spike wheat cultivar,and Lankaoaizao 8,a large-spike wheat cultivar.The results indicated that kernel dry weight and the rate of grain filling of two wheat cultivars was increased in grain filling stage.With nitrogen application rate increased,the kernel dry weight and grain filling rate of Lankaoaizao 8 increased while Yumai 49-198 decreased.The highest value of kernel dry weight and grain filling rate of Lankaoaizao 8 were observed in N3 treatment.Starch paste properties of Lankaoaizao 8 increased with added nitrogen and the highest value were observed in N3 treatment.The starch paste parameters of Yumai 49-198 increased with nitrogen application rate increasing and attained the highest value in N2 treatment.The difference between treatments of Yumai 49-198 was not significant.