不同放牧强度和时期对内蒙古克氏针茅草原牧草养分含量的影响

The Effects of Different Grazing Intensities and Periods on Forage Nutritive Contents in Inner Mongolia Stipa krylovii Grassland

分析比较了不同放牧强度(对照、轻度、中度、重度)和不同放牧时期对内蒙古克氏针茅草原牧草主要养分含量的影响。结果表明,不同放牧强度对牧草粗脂肪、中性洗涤纤维、酸性洗涤纤维、灰分含量影响较大(P<0.05);对牧草粗蛋白、钙、磷含量的影响较少(P>0.05);放牧时期对牧草粗蛋白、粗脂肪、酸性洗涤纤维、灰分、钙、磷含量的影响较大(P<0.05);对牧草中性洗涤纤维含量的影响较少(P>0.05)。

The effects of the different grazing intensities （CK、LG、MG、HG） and grazing periods on forage nutritive compositions of Inner Mongolia Stipa krylovii grassland were analysed in this study. The results showed that there were significant effects （P＆lt;0.05） of different grazing intensities on the contents of crude fat, neutral detergent fiber, acid detergent fiber, ash of forage, while no effects P＆gt; 0.05） on the contents of crude protein, calcium, phosphorus of forage. Grazing periods affected the contents of crude protein, crude fat, acid detergent fiber, ash, calcium, phosphorus of forage, while no effect on neutral detergent fiber content of forage.