采用不同指标评价牧地载畜力的比较研究

A Com parative Study on Evaluating Stocking Density of Rangeland by Different Index

选用代谢能、消化能、总热能、干物质、粗蛋白和可消化粗蛋白质等6项指标,进行全国不同类型、不同区域的天然牧地和人工牧地载畜力的比较评价,结果表明,采用代谢能或者消化能作指标较为适宜,通常不宜采用总热能、干物质、粗蛋白或可消化粗蛋白质作指标,特别是当牧地饲用植物的蛋白质含量较高(如各种人工牧地和高寒类天然牧地)或较低(如草丛类和南方区的天然牧地)之时。

Evaluating stocking density of artifical rangeland and natural rangeland in different region by 6 indexes of metabolic energy, digestible energy, total thermal energy, dry matter, crude protein and digestible protein, the results showed that it was appropriate to evaluate a stocking density of rangeland by metabolic energy or digestible energy.It was not suitable by total thermal energy, dry matter, crude protein and digestible protein, especially when the protein content of forage plants in rangeland was high （such as various artificial rangeland and the alpine types of natural rangeland） or was low （such as the herbosa types and natural rangeland of south region of China）.