A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in Soil
Large-scale use of nitrogen-based chemical fertilizers, specific to intensive agriculture, has undesirable effects consisting of soil degradation and atmospheric loading with carbon dioxide. Good practice illustrates, however, that sustainable agriculture can be achieved by substituting as much as...
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Editura ASE
2018-05-01
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| Online Access: | http://www.amfiteatrueconomic.ro/temp/Article_2734.pdf |
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| author | Gabriela Loredana Dinulescu Valentina Ofelia Robescu Florin Radu Gabriel Croitoru Valentin Radu |
| author_facet | Gabriela Loredana Dinulescu Valentina Ofelia Robescu Florin Radu Gabriel Croitoru Valentin Radu |
| author_sort | Gabriela Loredana Dinulescu |
| collection | DOAJ |
| description | Large-scale use of nitrogen-based chemical fertilizers, specific to intensive agriculture, has
undesirable effects consisting of soil degradation and atmospheric loading with carbon dioxide. Good
practice illustrates, however, that sustainable agriculture can be achieved by substituting as much as
possible chemically synthesized nitrogen with biologically fixed nitrogen.
This research is part of a study cycle that aims to use the natural symbiotic fixation models to bring
into the soil and plants as much as possible atmospheric nitrogen, non-polluting, antioxidant and
generator of humus and durability. We had work with a pea culture, seated in a rotation of 4 years the
type pea, wheat-rape, maize, and we watched at three parameters of the symbiotic fixation between
peas with species Rhizobium leguminosarum.
The experiments were carried out in two locations in southern Romania (Burnas Plain - on the Plateau
of Alexandria, and in the Southern Plain - Modelu, Calarasi) and the results were:
• in dynamics the nodosities begin to form at 22-24 days after sowing, their number increases
accentuated until the 37 days of life, after which it decreases slightly until the 70th day. The maximum
number of nodosities on roots reaches a number of 57-58 per plant. The life of a nodosity is not
longer than 10 days;
• the weight of dry nodosities is on the peak of biological activity higher at Modelu (5.8 g/m2) at
38 days after sowing, and less in Alexandria (4.1 g/m2) at 37 days after sowing (Figure no. 2 in-text);
• starting from the weight of the nodosites and using their transformation coefficient in the N
(nitrogen) active substance (which is 4.6), and using the functional analysis of the correlations and
integral calculations, the dynamics of nitrogen accumulation in the form of a high precision
polynomial function (order 14) was obtained (figure no. 3 in-text), which tells us that: the highest
amount of nitrogen is obtained on day 41 after sowing in the amount of 6.52 Kg N active
substance/ha. Cumulative calculation obtained through the integral function the total and average
quantity obtained for the two locations in 2016 – 2017 was about 116 kg N/ha (1). |
| format | Article |
| id | doaj-art-6b82f99d6be44d60b0b4403e76c92f4c |
| institution | OA Journals |
| issn | 1582-9146 2247-9104 |
| language | English |
| publishDate | 2018-05-01 |
| publisher | Editura ASE |
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| series | Amfiteatru Economic |
| spelling | doaj-art-6b82f99d6be44d60b0b4403e76c92f4c2025-08-20T02:06:07ZengEditura ASEAmfiteatru Economic1582-91462247-91042018-05-01204851052010.24818/EA/2018/48/510A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in SoilGabriela Loredana Dinulescu0Valentina Ofelia Robescu1Florin Radu2Gabriel Croitoru 3Valentin Radu4 Bucharest University of Economic Studies, RomaniaValahia Univesity of Targoviste, RomaniaValahia Univesity of Targoviste, RomaniaValahia Univesity of Targoviste, RomaniaValahia Univesity of Targoviste, RomaniaLarge-scale use of nitrogen-based chemical fertilizers, specific to intensive agriculture, has undesirable effects consisting of soil degradation and atmospheric loading with carbon dioxide. Good practice illustrates, however, that sustainable agriculture can be achieved by substituting as much as possible chemically synthesized nitrogen with biologically fixed nitrogen. This research is part of a study cycle that aims to use the natural symbiotic fixation models to bring into the soil and plants as much as possible atmospheric nitrogen, non-polluting, antioxidant and generator of humus and durability. We had work with a pea culture, seated in a rotation of 4 years the type pea, wheat-rape, maize, and we watched at three parameters of the symbiotic fixation between peas with species Rhizobium leguminosarum. The experiments were carried out in two locations in southern Romania (Burnas Plain - on the Plateau of Alexandria, and in the Southern Plain - Modelu, Calarasi) and the results were: • in dynamics the nodosities begin to form at 22-24 days after sowing, their number increases accentuated until the 37 days of life, after which it decreases slightly until the 70th day. The maximum number of nodosities on roots reaches a number of 57-58 per plant. The life of a nodosity is not longer than 10 days; • the weight of dry nodosities is on the peak of biological activity higher at Modelu (5.8 g/m2) at 38 days after sowing, and less in Alexandria (4.1 g/m2) at 37 days after sowing (Figure no. 2 in-text); • starting from the weight of the nodosites and using their transformation coefficient in the N (nitrogen) active substance (which is 4.6), and using the functional analysis of the correlations and integral calculations, the dynamics of nitrogen accumulation in the form of a high precision polynomial function (order 14) was obtained (figure no. 3 in-text), which tells us that: the highest amount of nitrogen is obtained on day 41 after sowing in the amount of 6.52 Kg N active substance/ha. Cumulative calculation obtained through the integral function the total and average quantity obtained for the two locations in 2016 – 2017 was about 116 kg N/ha (1).http://www.amfiteatrueconomic.ro/temp/Article_2734.pdfbiologically fixed nitrogennatural patternsnodositieschemical synthesis nitrogenbioeconomic mode |
| spellingShingle | Gabriela Loredana Dinulescu Valentina Ofelia Robescu Florin Radu Gabriel Croitoru Valentin Radu A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in Soil Amfiteatru Economic biologically fixed nitrogen natural patterns nodosities chemical synthesis nitrogen bioeconomic mode |
| title | A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in Soil |
| title_full | A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in Soil |
| title_fullStr | A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in Soil |
| title_full_unstemmed | A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in Soil |
| title_short | A Bioeconomic Solution for Replacing Chemical Fertilizers by Organic Processes for Atmospheric Nitrogen Fixation in Soil |
| title_sort | bioeconomic solution for replacing chemical fertilizers by organic processes for atmospheric nitrogen fixation in soil |
| topic | biologically fixed nitrogen natural patterns nodosities chemical synthesis nitrogen bioeconomic mode |
| url | http://www.amfiteatrueconomic.ro/temp/Article_2734.pdf |
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