Crescimento inicial de cafeeiro e frações de nitrogênio e carbono da matéria orgânica do solo em função da adubação orgânica

• Autor(a) principal: Vilela, Emerson Ferreira
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/4559
• topic: Cafeeiro; Nitrogênio; Carbono; Adubação orgânica; Coffee; Nitrogen; Carbon; Organic matter; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA

This research was conducted in two experiments, both with coffee variety Oeiras. The first assessed the effect of the supply of nutrients other than N-legume on the initial growth of coffe and on soil fertility,The treatments consisted of three types of fertilizer: ammonium sulphate; mass of grey velvet bean or mass of pinto peanut. The growth of coffee plants was monthly assessed by measuring plant height (cm), stem perimeter (cm), total number of leaves, total number of branches, total number of nodes and diameter of the tree (cm). Soil fertility was assessed by routine analysis at the end of the experiment. The second experiment evaluated the effect of green manure and organic fertilizer application on the content and compartmentalization of C and N in the soil of coffee plantation under organic fertilization treatments were: (L100%) coffee intercropped with a legume to cut labelabe 90 days, with 100% organic fertilizer, (L50%) coffee intercropped with the legume labelabe cut to 90 days, with 50% organic fertilizer; (% T100) coffee without legume, with 100% organic fertilizer, (T50%) coffee without legume, with 50% of organic manure. Soil samples were collected in Oct/09, Feb/10, Mar/10, Apr/10 Oct/10; fev/11; mar/11; abr/11. The analysis in soil organic matter were: C and N microbial biomass, total organic carbon (TOC), total nitrogen (TN), C and N of humic substances [fulvic acid fraction (FAF), humic acid fraction (HAF) and humin (HUM)], fractions of carbon oxidized (F1, F2, F3, F4). In the second experiment there was no interaction effect between treatment and evaluation periods in any of the variables evaluated. At each time either the beginning or the end of the evaluations there was no treatment effect on any of the variables. There was an effect of sampling time on all variables, except for carbon FAH and carbon oxidized (F2, F3). The COT has increased on average from 1.47 to 1.87 dag / kg, the amount of NT decreased on average from 0.16 to 0.13 dag / kg, the carbon humin decreased on average from 1.2 to 1, 13 dag / kg, the humin nitrogen content also decreased on average from 0.105 to 0.075 dag / kg, the carbon content of biomass was on average 193 to 94mg/Kg biomass and nitrogen was 15.49 to 21 49 mg / kg. These results indicate that there was a change of carbon and nitrogen in the compartments of soil organic matter.