engleski

Application of ALXP computer model for fertilization recommendation in conservation soil tillage systems

Some of the most important agrotechnical measures in crop production are soil tillage and fertilization. Irregular and scientifically unfounded implementation of above mentioned measures have negative effects on environment, yields, profit and in the end on health safety of food. Producing safe food while preserving the environment is a standard today, but it also requires a rapid response of agricultural producers to the newly arisen situations. Main objective of this paper is to test the advanced expert model for calculation of optimal nitrogen fertilization in different conservational systems of tillage. The model takes into account 30 parameters on basis of which it calculates recommendations for fertilization together with a proposal of measures for soil conditioning. Multi- year research trials are conducted in central part of Croatia (this paper will present only two experimental years – climatically very divergent) on the soils of limited fertility for winter wheat and maize with five different tillage systems (T1- Conventional soil tillage, T2-Subsoiling, T3- Chiseling, T4-Discharrowing, T5-No-tillage) and three levels of nitrogen fertilization (N1 - model calculated optimal level, N2 - 50% lower dosage and N3 - 50% higher dosage). On the basis of obtained results it was determined that the weather conditions had the strongest impact, after that tillage and the nitrogen fertilization had the weakest impact primarily on yield and yields components. By application of AlXp computer model, significant impact on ecological and economic justification of cultivation of winter wheat and maize was accomplished, by selecting optimal agrotechnical procedures (soil tillage and nitrogen fertilization) in compliance with agroecologic conditions.

fertilization ; computer model ; conservation soil tillage ; soil conditioning ; nitrogen

nije evidentirano