紫花苜蓿多元杂交后代优良株系筛选研究

通过对甘农3号、甘农5号和游客紫花苜蓿多元杂交后代选育的36个株系及其亲本的生长、产量、品质等相关指标的测定，采用灰色关联度理论，构造综合评价模型进行供试材料综合评价，筛选出速生12#、速生11#株系为最理想的优良株系，生长高度分别为105.44cm、105.42cm；生长速度分别为1.74cm/d、1.68cm/d；茎叶比分别为0.30、0.35；分枝数分别为23、17；鲜草产量分别为39.99 t/hm2、35.13 t/hm2；粗蛋白含量分别为19.95%、23.89%；相对饲用价值为153.15%、157.02%。多叶2#、速生5#、速生20#、速生21#等4个株系为较理想的优良株系。

Study on selecting the excellent strains of Alfalfa hybrid offspring

Through measured the indexes related to growth, yield and quality of Gannong No.3, Gannong No.5 , tourists alfalfa and their hybrid offspring, using gray relevancy analysis method of the gray systematic theory, structured the comprehensive evaluation model for all materials , selected fast-growing 12 # and fast-growing 11 # of the hybrid offspring as the best strains, including growth height were 105.44 cm, 105.42 cm; Growth rate were 1.74 cm/d, 1.68 cm/d; stem-leaf ratio were 0.30 and 0.35; Branch number were 23, 17; fresh yield were 39.99 t/hm2, 35.13 t/hm2; Crude protein content were 19.95% and 23.89%, Relative feeding value for 153.15%, 157.02%. Relatively good strains were Many leaf 2 #, fast-growing # 5, fast-growing 20 #, fast-growing 21 #.