Dry matter production and nutritive value of alfalfa (Medicago sativa L) and orchardgrass (Dactylis glomerata L.) under different light regimes

被引:0
作者
Varella, AC
Peri, PL
Lucas, RJ
Moot, DJ
Mcneil, DL
机构
来源
PROCEEDINGS OF THE XIX INTERNATIONAL GRASSLAND CONGRESS: GRASSLAND ECOSYSTEMS: AN OUTLOOK INTO THE 21ST CENTURY | 2001年
关键词
crude protein; digestibility; shade; silvipastoral; slat; Pinus radiata;
D O I
暂无
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Spring and summer alfalfa dry matter and nitrogen production rates were greater than orchardgrass in open pasture and under three shade levels. Ten year old Pinus radiata allowed 60% light transmissivity. The addition of artificial shade resulted in 45% and 25% transmissivity. Orchardgrass pastures were nitrogen deficient and water stressed. In contrast, alfalfa was not stressed and it was more light responsive than orchardgrass. Differences in nutritive value were relatively small between species and between light regimes. Sheep liveweight gain on alfalfa was greater than on orchardgrass. Orchardgrass demonstrated shade tolerance, but alfalfa was more productive even at 25% transmissivity. Conventional concepts of shade tolerance may not be appropriate when screening pasture species for silvipastoral systems.
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页码:660 / 661
页数:2
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