engleski

Are there any useful effects of wastes in the crop production?

Nowadays, one sugar factory remained in decreased capacity in Hungary. So, the absence of lime-sludge forces the agriculture to find other liming materials. The metallurgy lime sludge contains 278, 400 mg kg-1 from calcium (Ca). The amount of calcium is 50% in sugar factory lime sludge. Calcium has very important role in amelioration of acidic soils. The pH of sugar factory originated lime sludge is 10.8- 11.2 pH, this value is 10.77 pH the metallurgy lime sludge. The experimental plants were sunflower (Helianthus annus L. cvs. Arena). The nutrient solution-plant system was examined. The examined material was added to the nutrient solution in different quantities: 0.17 g dm-3, 1.7 g dm-3, 17 g dm-3. The content of elements of metallurgy lime sludge was measured with ICP. Dry matter accumulation of shoots and roots, relative chlorophyll contents, absolute chlorophyll a, b and carotene contents also were measured. The root dry weights were increased at all treatments. The contents of absolute chlorophyll a, b and carotene increased when 17 g dm-3 was added to the nutrient solution. The dry matter accumulation of roots increased when metallurgy lime sludge was applied. Same increase was observed at shoots. On the other hand, the application of metallurgy lime sludge can be limited because of its heavy metal contents.

acidic soils; crop production; land use; lime sludge

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