INFLUENCE OF KxNP FERTILISERS IN LONG-TERM FIELD EXPERIMENTS ON AGROCHEMICAL SOIL INDICES AND ON WINTER WHEAT YIELD AND QUALITY IN THE PRELUVOSOIL CONDITIONS FROM NORTH-WEST PART OF ROMANIA

摘要

Since 1968, in Romania was set up a stationary long-term field experiments with fertilisers and lime in all the agricultural research stations that belong to Agricultural Research and Development Institute of Fundulea. The experiments were set up using a unitary scheme for researching the evolution of soil fertility and the influence of fertilisers and lime rates and combinations on level and quality yield of different crops. The preluvosoil of the north-west part of Romania is a medium providing with the main nutritive elements, with a weak acid reaction in the ploughing horizon. In this paper are presented the results regarding the influence of potassium fertilisers applied on different nitrogen-phosphorous (NP) background on main agrochemical indices and on winter wheat yield and quality in long-term field experiment set up in 1974 at Agricultural Research and Development Station of Oradea.