密度和氮肥施用量对镇麦168产量和品质的影响

Effects of Planting Density and Nitrogen Applications on Grain Yield and Quality of ZHENMAI168

镇麦168是江苏淮南首个优质强筋红皮小麦新品种，具有优质强筋、产量潜力大、抗病性和抗逆性较强等特点。为探讨镇麦168大面积推广适宜的栽培措施，本文研究了该品种不同种植密度、氮肥施用量以及二者的交互作用对其产量和品质的影响。结果表明：随种植密度的增加，镇麦168的有效穗数、产量、形成时间、稳定时间、粗蛋白含量和容重先上升后下降，每穗实粒数、千粒重和湿面筋含量则逐渐减少。氮肥施用量为240～330kg·hm-2，增施氮肥可以提高镇麦168的产量，影响其构成因素，同时也能改善粗蛋白含量、湿面筋含量和容重等品质指标。本试验条件下，使镇麦168高产和优质同步提高的最佳组合是密度为270万株·hm-2、氮肥施用量为330kg·hm-2。

Zhenmai168 is a first strong gluten and red-seeded wheat cultivar in southern Huaihe River in Jiangsu Province, which exhibited strong gluten quality, high yield potential, strong resistance to diseases and environment. In order to explore suitable cultivation measures for the large-scale of wheat cuhivar, Zhenmai168, the effects of different planting density, nitrogen fertilizer level and their interaction on its yield and quality were investigated in this study. The results showed that effective spikes, yield, dough development time, stability time, crude protein content and volume weight rose first and then dropped as plant density increases of Zhenmai168, however, grains per panicle, 1000 -grain weight and wet gluten content reduced gradually. When nitrogen application amount was 240 to 330kg＂ hm-2, the increase of nitrogen would improve wheat yield, affect its components, and improve quality indices of crude protein content, wet gluten content and volume weight as well. Under this condition, in order to get high yield and good quality, the optimal combination of density and nitrogen applications were 270 × 104plants. hm-2and 330kg. hm -2, respectively, for Zhenmai168.