ABSTRACT
The response of potato plants to organo-mineral fertilization is still poorly understood. Hence, the aim of this study was to evaluate absorption and extraction of micronutrients by Agata potato cultivar in winter crop. The experiment was conducted in the municipality of Cristalina, Goiás state, Brazil, from May 26 to August 29 of 2012. The experimental design was a randomized block with five organo-mineral fertilizer rates, one mineral fertilizer rate (control) and four replications for each treatment. The results demonstrated that the mean total absorption of micronutrients by potato plants for the organo-mineral treatments was higher relative to the mineral treatment; and also that micronutrients were absorbed in the following order: Fe> Zn>Mn> Cu> B, in relation to total amounts. The average export of micronutrients in potato plants treated with organo-mineral fertilizer was 28%, 37%, 25%, 8% and 17% for Cu, Fe, Mn and Zn (respectively)relative to total amounts absorbed by the plants.
A resposta das plantas de batata à adubação organo-mineral ainda é pouco conhecida. Assim, o objetivo deste estudo foi avaliar a absorção e extração de micronutrientes por cultivar Agata de batata na safra de inverno. O experimento foi conduzido no município de Cristalina, Goiás, Brasil, de 26 de maio a 29 de agosto de 2012. O delineamento experimental foi um bloco casualizados com cinco doses de fertilizantes organo-minerais, uma dose mineral de fertilizante (controle) e quatro repetições para cada tratamento .Os resultados demonstraram que a absorção total média de micronutrientes por plantas de batata para os tratamentos organo-minerais foi maior em relação ao tratamento mineral, e também que os micronutrientes foram absorvidos na seguinte ordem: Fe> Zn>Mn> Cu> B, em relação às quantidades totais. A exportação média de micronutrientes em plantas de batata tratadas com adubo organo-mineral foi de 28%, 37%, 25%, 8% e 17% para Cu, Fe, Mn e Zn (respectivamente) em relação às quantidades totais absorvidas pelas plantas.
Subject(s)
Plants , Solanum tuberosum , Micronutrients , FertilizersABSTRACT
In this study,field cultivation experiments of Notopterygium incisum had been carried out for three years, and samples had been collected monthly during growth seasons, and biomass and nutrient elements of aerial and underground part of sampled plants had been determined to assess their seasonal and interannual dynamics respectively. The results showed that biomass of underground part (dry weight) increased mainly in the second year after seedling transplanting, i.e., biomass increased about 32 times in the second year whilst less than 6 times and 2 times in the first year and in the third year, respectively. Therefore, efforts for yield improvement should be focused on the first two year in artificial cultivation of N. incisum. Accumulation of nutrient elements increased steady in the underground part during the first and second year, then showed a sharp decline in the first phase of growth season in the third year, while its accumulation in July to August of third year was higher than the value of second year. Ca, Fe, B and Zn were larger demand nutrient elements to meet growth demands whether for the underground part or aerial part during the second year and third year for N. incisum cultivation. This result provided instructional guidance and scientific basis for artificial cultivation and specific fertilizer of N. incisum.
ABSTRACT
O objetivo foi o de avaliar a emergência das plântulas, o crescimento das plantas, bem como a produtividade e a qualidade das sementes produzidas de nabo forrageiro (Raphanus sativus L.) influenciados pelos resíduos de plantas de girassol (Helianthus annus). Para isto, o delineamento experimental adotado foi o de blocos casualizados em parcelas subdivididas com quatro repetições. As parcelas foram representadas por área com e sem resíduos de plantas de girassol e, as subparcelas, por seis épocas de coleta (20, 40, 60, 80, 100 e 120 dias após a semeadura - DAS). Os resíduos de plantas de girassol não interferiram no estabelecimento das plântulas de nabo forrageiro, reduziram a produção de sementes por planta e favoreceram o vigor das sementes produzidas. Após 40 DAS, houve prejuízo ao desenvolvimento das plantas, à eficiência de translocação dos fotoassimilados e ao acúmulo de nutrientes de plantas de nabo forrageiro provenientes de área com resíduos de girassol.
The aim was to evaluate the seedling emergence, plant growth, seed yield and seed quality of oil radish (Raphanus sativus L.) influenced by the sunflower (Helianthus annus L.) plants residues. The experiment was randomized in split plot complete block with four replications. The plots were represented by the area with and without sunflower plants residues and the subplots, by the six sampling times (20, 40, 60, 80, 100 and 120 days after sowing - DAS). The sunflower plants residues did not affect seedling establishment in oilseed radish, reduced the seed yield per plant and favored the seed vigour. After 40 DAS, there was damage to the plant development, the efficiency of translocation of assimilates and nutrients accumulation in oil radish plants from area with sunflower residues.
Subject(s)
Food , Helianthus , Raphanus , Seedlings , AllelopathyABSTRACT
Com o objetivo de avaliar o comportamento da Brachiaria brizantha cv. Marandu sob a influência da adubação mineral e orgânica, quando cultivada em rejeito estéril da mineração de quartzito. Conduziu-se um experimento em casa de vegetação em delineamento experimental inteiramente casualizado com quatro repetições. Os tratamentos consistiram de cinco combinações de adubação orgânica (AO) e mineral (AM) e um tratamento adicional do rejeito estéril sem AO e AM (Testemunha). As combinações foram: 0%AO/100%AM; 25%AO/75%AM; 50%AO/50%AM; 75%AO/25%AM; 100%AO/0% AM. As doses de 100% de AM e AO foram de 50 kg N, 50 kg P2O5 e 40 kg K2O e 10 t de esterco de curral por ha. As variáveis avaliadas foram peso de massa seca (parte aérea, raiz e total) e teores e acúmulos de nutrientes. A B. brizantha cv. Marandu respondeu a AM e AO com as doses recomendadas de 37 kg N, 37 kg P2O5, 30 kg K2O e 2,6 t esterco de curral por ha. As doses de AM e AO aplicada ao rejeito estéril de quartzito influenciou o estado nutricional da forrageira. O acúmulo de nutrientes na forrageira nas doses recomendadas se deu na seguinte ordem na parte aérea: N > K > P > S > Ca > Mn >B > Fe> Zn > Cu e nas raízes: N> S > K > Ca > Mg > P > Fe > Mn > B > Cu > Zn.
In order to evaluate the behavior of Brachiaria brizantha cv. Marandu under the influence of mineral fertilizer and organic, when grown in sterile reject from quartzite mining. The experiment was conducted under of a greenhouse in a completely randomized design with four replications. The treatments consisted of five combinations of mineral (MF) and organic (OF) fertilizer and an additional treatment of the sterile reject without MF and OF (Witness). The combinations were: 0%OF/100%MF; 25%OF/75%MF; 50%OF/50%MF; 75%OF/25%MF; 100%OF/0% MF. Doses of 100% MF and OF were 50 kg N, 50 kg P2O5 and 40 kg K2O and 10 t bovine manure per ha. The variables evaluated were dry matter weight (shoot, root and total) and nutrients contents and accumulation. B. brizantha cv. Marandu responded to MF and OF with the recommended doses of 37 kg N, 37 kg P2O5, 30 kg K2O and 2.6 t bovine manure per ha. The doses of MF and OF applied to sterile reject quartzite influenced the nutritional status of the forage. The accumulation of nutrients in the forage at recommended doses in the following order was on the shoot: N > K > P > S > Ca> Mn > B > Fe > Zn > Cu and roots: N > S > K > Ca > Mg > P > Fe > Mn > B > Cu > Zn.