MARIANA CARMEN BURTEA, IOAN GABRIEL SANDU, GABRIELA ALINA CIOROMELE, MARIAN BORDEI, AUREL CIUREA, GHEORGHE ROMANESCU<br>Sustainable Exploitation of Ecosystems on the Big Island of Braila

MARIANA CARMEN BURTEA, IOAN GABRIEL SANDU, GABRIELA ALINA CIOROMELE, MARIAN BORDEI, AUREL CIUREA, GHEORGHE ROMANESCU
Sustainable Exploitation of Ecosystems on the Big Island of Braila

Abstract:

Sustainable agriculture is the only solution to both meet human needs and conserve natural resources to maintain and improve the environment. To achieve all this, however, requires greater research into cereal production the economic efficiency of this sector. The research over the period 2007-2009 was designed to establish the adaptability on various systems of soil mechanic works and different doses of fertilizer of maize hybrids by applying classical and conservative technologies, agricultural technologies less pollutant in the Big Island of Braila, agricultural technologies what can ameliorate physical, chemical and biological parameters of soil. The poly-factorial type 2x2x3 experiment used two hybrids of maize (PR36R10 and PR36R11), two tillage systems (traditional and conservative) and 3 doses of fertilizer (unfertilized, N50P0, N100P0); the experiment was done on a eutric gleiosol, soil characteristic of the analyzed ecosystem. By introducing averages obtained during the three study years in the analysis of production variance, statistical interpretation was concluded that the production fluctuations from year to year were high, and the combination of factors is significant. Following statistical interpretation of results, the evolution of the average productions, average quantity of grain maize obtained were shown to have a significant decreased in 2007, due to drought and high temperatures during pollination. This had led to the disruption of the grain formation process. From the analysis of the influence of the tillage system on production, significant increases between the PR36R10 hybrid and the control variant (0.48 - 0.68 t/ha,). Comparison of the classic system and the conservative system showed one influenced less the grain production, both for PR36R10 hybrid and the PR36R11 hybrid. Following the productions in terms of N dose application, in comparison to the dose of fertilization which took effect obviously on production, the system of mechanical work of the soil influenced insignificant production of grain maize obtained it was found that production increased by up to 1320 kg/ha in comparison with the control variant, without fertilization, liming on the basis of nitrogen have led to advancements in production. Variants treated with fertilizer 100 kg N active substance have had increase in higher production with 583 kg/ha, compared with variants treated with fertilizer - 50 kg active substance N. Keywords: cereals hybrid adaptability, conservative procedure, conventional, fertilization

Issue: 2015, Volume 66, Issue 5

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