THE VARIATION OF SULFUR CONTENTS AND UPTAKES IN TRITICALE DURING GROWTH

In a field experiment set up on a calcareous sandy soil the effect of fertilization with N and build-up PK - doses - was studied on the dyna mics of dry matter and sulphur uptake inf triticale. Treatments by nit rogen and phosphorus fertilizers significantly increased the dry matte r, S-concentrations and S-uptakes related to unfertilized. The dynamic s of the S-concentrations indicated a decrease, while the dry matter a nd S-uptake on the contrary showed an increasing trend during growth. Using phenodynamics model - elaborated in Hungary - the predicted and the observed data of sulphur uptake correlated well.