THE BALANCE OF HUMUS AND NUTRIENTS OF CROP ROTATION WITH THE APPLICATION OF PLANT RESIDUES AND FERTILIZERS IN SMALL DOSES ON CALCAREOUS CHERNOZEM OF MOLDOVA
The balance of soil fertility in the current conditions of agriculture has a topical interest. The basic objectives of the research were to assess the possibility of obtaining a non-deficit balance of the main indicators of soil fertility (humus, nutrients) in Calcareous Chernozem using small dose...
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| Format: | Article |
| Language: | English |
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Editura Universitatii din Pitesti
2018-07-01
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| Series: | Current Trends in Natural Sciences |
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| Online Access: | http://natsci.upit.ro/media/1647/paper-13.pdf |
| Summary: | The balance of soil fertility in the current conditions of agriculture has a topical interest. The basic objectives of the
research were to assess the possibility of obtaining a non-deficit balance of the main indicators of soil fertility (humus,
nutrients) in Calcareous Chernozem using small doses of mineral fertilizers and the return of plant residues of
cultivated crops. The mass balance that comprises inputs and outputs for humus, nitrogen (N), phosphorus (P) and
potassium (K) from cropland of the cereal crop rotation in the 2001-2017 period in the long-term experience was
analyzed. We found a deficit in N (-1.2 kg.ha-1 .yr-1) using of crop residues on experimental plot without fertilization
(since 1950) and a positive balance for P and K (5.7 and 43.8 kg.ha-1.yr-1). The combined use of plant residues and
mineral fertilizers in small doses (N47P46) on previously fertilized backgrounds helps maintain the positive humus and
N-P-K nutrient balance. |
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| ISSN: | 2284-953X 2284-953X |