新选育饲草玉米品系饲用营养价值初步研究

对利用一年生大刍草和四倍体多年生大刍草分别与玉米杂交选育出的一年生饲草玉米(SC1)和多年生饲草玉米(SC3)生物产量和饲用营养成分进行分析,结果表明:SC1和SC3鲜草年产量分别达115 620kg/hm2、174 045kg/hm2,是普通玉米的4～6倍;SC3的粗蛋白质(CP)和无氮浸出物(NFE)含量最高,分别为17.57%、48.73%,粗纤维(CF)含量最低,为21.65%,其粗脂肪(EE)和灰分(CA)含量分别为4.30%和7.75%;SC1的营养成分含量分别为:(CP)14.73%、(CF)26.09%、(NFE)45.29%、(EE)4.78%和(CA)9.11%;化学营养类型分析表明SC1与SC3分别属NC型和N型,都是高产高饲用价值的新型饲草.

Studies on Forage Nutritive Value of Forage Maize

New types of forage maize included annual and perennial forage maize,which were bred by distant hybridization between maize and teosintes(Zea mexicana and Zea perennis,respectively).Analyzing the biology yield of SC1 and SC3 indicated that the fresh matter yield per year was 115 620kg/hm~2 and 174 045kg/hm~2,respectively.The yield was four to six times than 48-2(Zea mays).Analyzing nutrient composition showed that SC3 had the highest crude protein content(CP) 17.57%,nitrogen-free extract content(NFE) 48.73% and the lowest crude fiber content(CF) 21.65%.Ether extract(EE) and crud ashe(CA) of SC3 was 4.30% and 7.75%.The nutrient compositions of SC1 were 14.73%(CP),26.09%(CF),45.29%(NFE),4.78%(EE) and 9.11%(CA).And SC1 and SC3 was NC and N type respectively by analyzing chemical nutrition type.These results indicated that SC1 and SC3 are high yield and high quality forage maize.