不同禾本科牧草在煤矿沉陷区的生长适应性与饲用价值比较

为充分利用采煤塌陷区发展草牧业,在山西省孝义市煤矿沉陷区测定老芒麦、狼尾草、披碱草和无芒雀麦四种禾本科牧草的产量、鲜干比及粗蛋白、粗脂肪、可溶性糖、中性洗涤纤维、酸性洗涤纤维含量,计算四种牧草的相对饲用价值并运用灰色关联度法对牧草的产量及品质进行综合评价,筛选适宜采煤塌陷区种植的禾本科牧草.结果 表明:无芒雀麦鲜草产量...

Comparison of Growth Adaptability and Feeding Value of Different Grasses in Coal Mine Subsidence Area

The experiment was conducted to screen the grass varieties most suitable for cultivating in coal mining subsidence area in order to make full use of this area to develop grass husbandry.The fresh grass yield,fresh to dry ratio,crude protein(CP),crude fat(CF),water soluble carbohydrate(WSC),neutral detergent fiber(NDF)and acid detergent fiber(ADF)of four grass forages including Elymus sibiricus,Pennisetum alopecuroides,Elymus breviaristatus and Bromus inermis were measured in the coal mining subsidence area of Xiaoyi city,Shanxi province.The relative feeding value of four grasses was calculated and the yield and quality of grasses were comprehensively evaluated by grey correlation method.The results showed that the yield of fresh grass and hay of Bromus inermis were the highest,while the contents of NDF and ADF were the lowest.The comprehensive evaluation of grey correlation degree showed that Bromus inermis>Elymus breviaristatus>Elymus sibiricus>Pennisetum alopecuroides.Therefore,Bromus inermis was the most suitable grass for cultivating in coal mining subsidence area.