Izvorni znanstveni članak
The influence of residual fertilizing by phosphorus and potassium upon winter wheat grain yield and some soil chemical properties in crop rotation maize-soybean-winter wheat-sugar beat
Anđelko Butorac
Ivica Kisić
Ferdo Bašić
Milan Mesić
Sažetak
The paper presents the results of eight-year investigations of residual fertilization with phosphorus and potassium for winter wheat grown in the four-year field crop rotation: maize-soybean-winter wheat-sugar beet in two rotations on luvic soil on redeposited loess, locality Lukač (Virovitica). Besides the unfertilized variant and standard mineral fertilization, the trial also included two treatments of residual fertilization with phosphorus and potassium for a four-year period and one residual fertilization treatment for a two-year period.
Efficiency of residual fertilization with respect to the winter wheat grain yield varied over the eight-year research period. Nevertheless, according to average eight-year results, higher yields were obtained with residual fertilization compared to standard mineral fertilization, in which, due to wheat physiological requirements, phosphorus had a more important role than potassium. Also, according to average eight-year values, plant available phosphorus and potassium contents of the soil increased significantly in all fertilized variants, except for standard mineral fertilization, compared to the unfertilized control variant. In the case of base saturation, the induced changes were primarily reflected in its reduction; in other words, mineral fertilization had an adverse effect on all parameters directly related to soil reaction, as well as on the parameters indirectly expressing such characteristics.
Ključne riječi
residual fertilizing by phosphorus and potassium; winter wheat grain yield; soil chemical properties; crop rotation
Hrčak ID:
2214
URI
Datum izdavanja:
10.2.2005.
Posjeta: 2.962 *