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为探讨大麦‘花22’品种高产合理的氮肥运筹措施,分析了氮肥运筹对其主要农艺性状、产量及产量构成指标的效应差异。结果表明:氮肥对大麦‘花22’的生育期、株高、主茎节间的伸长、叶片生长、茎蘖发生、穗长、穗粒数、有效穗数及产量等性状均有明显促进效应。纯氮量与大麦株高、产量的最佳拟合方程为Y=x/(0.6324+0.0164x)+64.3857(R2=0.9652**)和Y=x/(0.0365+0.0001x)+1 927.6994(R2=0.9941**)。高比例基蘖肥对大麦的株高、主茎1—4节间伸长、叶片生长、茎蘖发生、穗粒数、千粒重等性状有明显促进效应,基蘖肥比例低则对有效穗数和产量指标促进效应明显。统计分析表明,大麦‘花22’获得6 000 kg/hm2左右产量,纯氮量在300—337.5 kg/hm2,基蘖肥与中后期追肥适宜比例为5∶5和6∶4。
In order to explore the reasonable and high-yielding nitrogen fertilizer strategy for barley ’Hua22’, the effects of nitrogenous fertilizer on its main agronomic characters, yield and yield components were analyzed. The results showed that nitrogen fertilizer had significant effects on the growth of barley ’Hua 22’, its plant height, elongation of main internodes, leaf growth, tillering, spike length, number of grains per spike, effective panicle number and yield effect. The best fitting equation of the yield of pure nitrogen and barley plant height was Y = x / (0.6324 + 0.0164x) +64.3857 (R2 = 0.9652 **) and Y = x / (0.0365 + 0.0001x) +1 927.6994 R2 = 0.9941 **). High proportion of basic tillering fertilizer had significant effects on barley plant height, main stem 1-4 internode elongation, leaf growth, stem-tillering, grain number per spike and grain weight per 1000, and low proportion of basic tiller and tiller, And yield indicators to promote the effect is obvious. Statistical analysis showed that the yield of barley ’Hua22’ was about 6 000 kg / hm2, the pure nitrogen was 300-337.5 kg / hm2, and the ratio of base tillering fertilizer to top dressing was 5: 5 and 6: 4.