红豆草茬地羔羊放牧系统力能学分析

ENERGETIC ANALYSIS OF LAMB GRAZING SYSTEM IN SAINFOIN STUBBLE FIELDS

为了探讨草地农业系统的丰产高效性能,作者通过羔羊轮牧与定牧加不同补饲水平的比较,对红豆草茬地不同利用方式下能量投入的产出差异进行了力能学分析。试验分A(轮牧+混合草料)、B(轮牧+燕麦干草)、C(定牧+混合草料)和D(定牧+燕麦干草)4组。试验期80天。结果表明,4种处理的能量产投比分别为22.3％(A)、19.98％(B)、16.67％(C)和17.50％(D),其中轮牧平均为定牧的1.24倍(P<0.05)。给轮牧系统增加辅助能投入比定牧系统更为经济有效。

A lamb grazing system in sainfoin stubble fields was studied from the stand point of view of agricultural energetics. Results from the experiment indicate that the output/input ratio of energy from four treatments of RM, SM, RO and SO were 22.34%, 19.98%, 16.67% and 17.51%, respectively. The ratio of rotational grazing was 1.24 times over that of set stocking. It would be more effective to increase energy input including the input of direct and indirect physiological energy to those Lamb under rotational grazing.