Plant components

The chemical composition varies between roots, stem and leaf. For a whole-plant analysis, it is essential that no root fibres are left in the ground, and that no other parts snap off and are left out of the sample. As much material as possible should be collected to minimize errors from variations in heterogeneity. If sampling at the pollen shedding stage, the heads should be contained in paper or polythene bags to collect pollen and anthers (Wilman and Altimimi, 1982). It is possible to separate many types of plant components. The variation of chemical nutrients within these components and the change in them with maturity is relevant to animal nutrition. It could also influence the cutting height of crops for conservation. Some ryegrass components are shown in Fig. 1.5.

Fig. 1.5. Components of a typical ryegrass plant (Lolium perenne L.), adapted from Wilman and Altimimi (1982).
0 0

Post a comment