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为简便预测粗饲料TDN含量,对①禾本科主体草(包括干草及青贮),②禾本科主体草中的青贮、③紫花苜蓿的纤维成分做了分析,并计算出了分析值(ADF、OCW、Oa、Ob及OCC)与TDN含量间的回归式。结果确认,在禾本科主体牧草,采用下面的OCC+Oa推算TDN含量是有效的。干草、青贮: TDN=30.4+0.654×(OCC+Oa),r=0.852~(**), TDN=-16.2+1.184×(OCC+Oa)+0.500×Ob,R=0.842~(**) 单一青贮: TDN=21.6+0.873×(OCC+Oa),r=0.907~(**) TDN=-32.6+1.486×(OCC+Oa)+0.582×Ob,R=0.917~(**) 另外,在紫花苜蓿中,TDN含量与ADF有较高的相关。
In order to easily predict the TDN content of roughage, the fiber composition of ① grass body grass (including hay and silage), ② grass silage, ③ alfalfa fiber composition were analyzed and the analysis values (ADF, OCW, Oa, Ob and OCC) and TDN content of the regression. As a result, it was confirmed that it is effective to calculate the TDN content using the following OCC + Oa in gramineous pasture. Hay: TDN = 30.4 + 0.654 × (OCC + Oa), r = 0.852 ~ (**), TDN = -16.2 + 1.184 × (OCC + Oa) + 0.500 × Ob, R = 0.842 ~ Single silage: TDN = 21.6 + 0.873 × (OCC + Oa), r = 0.907 ** TDN = -32.6 + 1.486 × OCC + Oa + 0.582 × Ob, R = 0.917 ** In addition, In alfalfa, TDN content and ADF have a higher correlation.