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633:631.559:631.87 (1) |
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Agronomie şi agroecologie Vol.52(1), 2018 |
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Simpozionul "„85 ani ai Facultăţii de Agronomie – realizări şi perspective”, dedicat aniversării a 85 de ani de la fondarea Universităţii Agrare de Stat din Moldova" Chişinău, Moldova, 1 ianuarie 2018 | ||||||
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CZU: 633:631.559:631.87 | ||||||
Pag. 152-156 | ||||||
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The paper approaches the problem of efficient utilization in agriculture of dehydrated sludge in geotubes - waste from urban wastewater treatment. The influence of three sludge doses of 23 t/ha, 46 t/ha and 92 t/ha on the crop yields was studied. The results have shown that administration of urban sludge has favored a significant increase in crop yields. The application of sludge over a period of six years in dose of 23-46 t/ha provided a specific crop yield of 174-92 in cereal units, in average - 133 kg/t. The sludge dose of 92 t/ha provided a specific increase on average for three years - 39.6 kg/t. The protein content, gluten in wheat grains and crude fat content in sunflower seeds increased in proportion to the applied dose of sludge. The increase in protein content was 1.5-2.5%, gluten - 2.0-3.6% and oil - 2.9-3.1%. Calculated on the incorporated sludge unit, it was found that the 23 t/ha sludge dose was recovered with higher yields and better quality indices compared to dose of 46 t/ha and 92 t/ha. |
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Cuvinte-cheie Nitrogen, Field Cultures, phosphorus, făt, urban sludge, Protein, harvest |
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