This research work evaluates the development of roots and shoots in wheat grown after sugarbeet and as continuous crop, with and without mineral fertilization. The root and shoot development was evaluated in the course of the growth cycle at the beginning and at the end of tillering, at flowering, at milky ripeness and at full maturity. The length of roots was measured following the Newman method, on soil auger samples taken in the space between rows down to 0.8 m depth. Data showed a different development both of shoots and roots and a different root distribution along the soil profile. In the sugarbeet-wheat rotation a greater yield was observed for both shoots and roots. In particular, a greater root development was observed in deeper layers during the whole growth cycle and reduced persistence during maturity in the top layers. Also fertilization had positive effects on the development of the whole plant; the effect on roots was evident with a greater development of shallow roots and a reduction on the deeper ones, especially after flowering. Also the shoot/root ratio was influenced by the examined factors.
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