EFFECTS OF FORE-CROP FERTILIZATION ON THE YIELD AND QUALITY OF KIDNEY BEANS UNDER VEGETABLE CROP ROTATION CONDITIONS

摘要

Kidney beans (Phaseolus vulgaris (L.) Savi.) ssp. Nanus cv. Lodi were grown as a mid-early second crop after lettuce on an alluvial meadow soil with pH((H2O)) = 6.4 and a plant density of 22 plants per m(2). The bean crop was grown without fertilization, but the lettuce crop was treated with mineral, organic or foliar fertilization. The application of different fertilizer sources to the fore-crop resulted in high yields of the subsequent bean crop, with good quality parameters and without pollutingthe arable soil layer with fertilizer residues. Foliar fertilization applied to the fore-crop resulted in a lower accumulation of nitrates in fresh beans in comparison with the other fertilizer sources. Organic fertilization supplied during the cultivation of the previous crop had a stronger effect than mineral fertilization on certain quality parameters of the kidney bean plants, such as dry matter, vitamin C content, and the accumulation of nitrates.