【摘要】 以4年生紫花苜蓿阿尔冈金(Medicago sativa L.Algonquin)为试验对象,以赤霉素(GA3)为试材,2005年在内蒙古民族大学农场进行叶面喷施试验,结果表明:低浓度喷施赤霉素促进紫花苜蓿株高的生长,100mg/kg喷施浓度下,4茬株高的平均值较CK、200mg/kg、300mg/kg分别增加12.2%、6.8%、7.2%.不同喷施浓度下各茬间的节间数、节间距和分枝数变化趋势不尽相同,但总体上表现为低浓度喷施具有促进作用.从4茬总产量来看,各处理均高于CK,100mg/kg、200mg/kg、300mg/kg处理较CK分别增产14.8%、7.5%、7.8%,且100mg/kg处理与CK差异达到显著水平(P<0.05).随喷施浓度的增加粗蛋白含量增加,粗纤维含量下降.更多还原

【Abstract】 Using four-year Medicago sativa L.Algonquin as experiment materials,the leaf blades are sprayed with the gibberellic on a farm of the Inner Mongolia University For Nationalities in the year 2005.The conclusions show that the low density of gibberellic improves the height of the Medicago sativa L.At the density of100mg/kg,the average height of plant of four cuttings increases by12.2%,6.8% and 7.2% compared to the CK,the density of 200mg/kg and the density of 300mg/kg.At the different density and different cuttings,the internode number,the internode length and the branches will vary differently,but at the low density of gibberellic,it will improve generally.From the total yield of the four cuttings,compared to the CK,the density of 100mg/kg,200mg/kg,300mg/kg increase by14.8%,7.5% and 7.8% and at the density of 100mg/kg,it is the most remarkable.With the increase of the spraying density,the content of the crude protein will increase but the content of the crude fiber will low.更多还原