Abstract
The in vitro digestibility method described by Tilley and Terry (5) has been applied to varieties of kale, rape, flat poll cabbage, clover, lucerne and silage maize in trials at the National Institute of Agricultural Botany. Several small modifications of the method are described. The method was developed originally for grass and had not previously been used for the brassicas and maize. Steps taken to check in vitro against in vivo results are described briefly in the appendix.The digestible dry‐matter content of the leaf in kale and rape was constant at about 80% but that of the stem varied over a wide range. Varietal differences were found, while a significant negative correlation was established between digestible dry matter and crude fibre. Some difficulties were encountered in applying the method to maize.
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