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将长江中下游优良小麦品种引种到忻定盆地进行春播,为明确品种的适宜施氮量,本试验以扬麦13、川麦42、宁2038(对照)为材料,设高(施纯氮255 kg/hm~2)、中(施纯氮187.5 kg/hm~2)、低(施纯氮120 kg/hm~2)3种施肥处理,探究施氮量对南引小麦品种生长发育和籽粒产量的影响。试验表明扬麦13产量优势稳定,适宜中肥(5 353 kg/hm~2)处理;而川麦42则是高肥下产量(5 840 kg/hm~2)极显著地高于其它处理。南引小麦主茎叶片数、株高与产量(累计贡献率达84.29%)关系密切,且孕穗期主茎叶片可溶性糖含量与产量正相关(R=0.99**)。主茎叶片数是春播冬麦获得高产的物质基础,而施氮量对产量的影响因品种而异。本试验将为春播冬麦合理施肥提供参考。
In order to clarify the suitable nitrogen application rate, we introduced the fine wheat cultivars in the middle and lower reaches of the Yangtze River to Xinding basin for spring planting. In this experiment, we used Yangmai 13, Chuanmai 42 and Ning 2038 as control materials, kg / hm ~ 2), medium (with pure nitrogen 187.5 kg / hm ~ 2) and low (with pure nitrogen 120 kg / hm ~ 2) to explore the effects of nitrogen application on the growth and development of the South- The impact of production. The results showed that the yield of Yangmai 13 was stable and suitable for middle-high and medium-fat treatments (5 353 kg / hm 2), while that of Chuanmai 42 was significantly higher than that of other treatments (5 840 kg / hm 2). There was a close relationship between the number of main stem leaves and the plant height and yield (total contribution rate of 84.29%) in south south wheat. The soluble sugar content of main stem leaf at booting stage was positively correlated with yield (R = 0.99 **). The number of main stem leaves is the material basis for high winter wheat sowing winter wheat yield, and the impact of nitrogen application rate on yield varies with the variety. This experiment will provide a reference for spring sowing winter wheat reasonable fertilization.