不同冷季型牧草品种的产草量及品质比较分析

采用随机区组试验设计,对引进的8个冷季型牧草品种进行产草量和营养成分的比较分析.结果表明:4次刈割的总鲜重和总干重在品种间差异极显著,且以蓝天堂黑麦草(7号)最高.品种间的粗蛋白含量差异显著,其中第1次刈割以奇可利(3号)最高,蓝天堂黑麦草(7号)居第2位;第2次仍以奇可利(3号)最高,特高黑麦草(1号)和蓝天堂黑麦草(7号)居其次;第3次以紫花苜蓿(8号)最高,其次是多年生黑麦草(4号);第4次以奇可利(3号)最高,多年生黑麦草(4号)居第2位;粗纤维、粗脂肪和粗灰分在品种间的差别较小.综合产草量和品质两方面考虑,蓝天堂黑麦草(7号)可作为本地首选推广的冷季型牧草品种,奇可利(3号)和多年生黑麦草(4号)可作为备选推广的牧草品种.

Comparative analysis of forage yield and nutritive composition of different cool-season forages

The nutritive compositions of 8 cool-season forage varieties were analyzed with random block design.The results showed that there were highly significant differences in total fresh weight and total dry weight among different varieties.The Blue Heaven(No 7) had the highest yield.There were significant differences among varieties in coarse protein.The protein content of Barckoria(No 3) was highest and Blue Heaven(No 7) was the second,respectively in 1st mowing.In 2nd mowing,the protein content of Barckoria(No 3) was ranked first,Tetragold(No 1) second and Blue Heaven(No 7) third,respectively.Victoria(No 8) had the highest coarse protein content in 3rd mowing,and Eminent(No 4) ranked second.In 4th mowing,Barckoria(No 3) and Eminent(No 4) were ranked first and second,respectively.There were minute differences in coarse fat,coarse fiber and coarse ash among different varieties.Comprehensive analysis of yield and nutritive composition indicated that Blue Heaven(No 7) can be preferred as a good cool-season forage variety in local region,whereas Barckoria(No 3) and Eminent(No 4) can be used as alternative varieties.