Influence of various farming systems on agrochemical indices and amount of microorganisms in Haplic Luvisol
¹Voke Branch of Lithuanian Institute of Agriculture, Žalioji a. 2, Trakų Vokė,LT-02232 Vilnius; e-mail: eugenija.baksiene@voke.lzi.lt
²Institute of Botany, Žaliųjų Ežerų 49, LT-08406, Vilnius;e-mail: olga.salina@botanika.lt
Abstract:
The article presents data from a study comparing the influence on plant productivity of three different farming systems – ecological, sustainable and chemical – and the use of various plants grown for green manure. Crops were lupine, white mustard and red clover. Calculations of the nutritional content of the soil in the experiments show that various crop rotations (treatments) affect the phosphorus and potassium balance.The data indicate that productivity of plant rotations depends on the plants cultivated andthe applied farming system. In all farming systems, the highest yield was achieved cultivating plants after fertilization with green manure (lupines and white mustard). The results of the experiments show that crop rotations result in negative nitrogen, phosphorus (except in sustainable and chemical farming systems) and potassium balance in the soil.Crop rotations had no effect on the soil acidity and increased total nitrogen and organiccarbon content in the soil. The amount of phosphorus in the soil increased in all farming systems; potassium increased only in the sustainable and chemical farming systems.Data indicating the number of micromycetes, organic and mineral nitrogen assimilatingbacteria in the rizosphere soil of various grown plants are also presented.
Key words:
agrochemical properties, bacteria, farming systems, micromycetes, nutrients balance, soil, yield