RESUMO O Vale do São Francisco constitui o maior produtor nacional de manga em regime irrigado. Na mangueira, além da produtividade, boro é nutriente que mais afeta a qualidade dos frutos, e sua deficiência pode provocar distúrbios fisiológicos. Nesse sentido, um experimento foi desenvolvido com objetivo avaliar associação incidência frutos Palmer acometidos desordem fisiológica seu efeito na produtividade frutos. Os tratamentos consistiram sete diferentes manejos adubação: T1 = Duas...

Pouco se conhece sobre os atributos mineralógicos e químicos dos solos da região do Alto Solimões, em comparação aos Médio Baixo Amazonas, mais estudados. No pela maior proximidade ambiente andino, há possibilidade de enriquecimento solos. Este trabalho teve por objetivo ampliar o conhecimento dessa meio caracterização três uma toposseqüência na Benjamin Constant (AM), próximo à fronteira Brasil-Peru. Tais situam-se das partes elevadas até a várzea, sendo classificados como Argissolo Amarelo...

Abstract Understanding the dynamics of decomposition and release nutrients from plant residues different covers, in association or succession, is essential to define more sustainable management strategies tropical soils. The objective this study was estimate rates during crop with chemical compositions when (Mix) succession as residue management. A carried out respective treatments a (2 × 6) + 1 factorial scheme: (a) without addition Pennisetum americanum (L); (b) six crops (legumes...

As mudanças nas distintas frações da matéria orgânica do solo (MOS) sob cultivo eucalipto são pouco conhecidas. Assim, o presente trabalho teve como objetivo avaliar impacto nos estoques de C das diversas MOS, em solos ocupados anteriormente por pastagens degradadas, bem verificar qual fração MOS constitui-se um indicador mais sensível à mudança uso solo. O estudo foi realizado plantações comerciais dois locais na região Vale Rio Doce-MG (Belo Oriente e Virginópolis), onde foram determinados...

Tem sido cada vez maior a preocupação das empresas do setor florestal em adotar práticas pautadas na conservação solo e da água. Nesse sentido, este trabalho teve por objetivo avaliar o impacto manejo dos resíduos colheita, preparo uso de industriais, fertilidade produtividade eucalipto. O experimento foi iniciado após corte raso um plantio comercial EUCALYPTUS GRANDIS, onde os colheita foram manejados (retirada todo resíduo; remoção casca galhos com diâmetro superior 3,0 cm; manutenção...

The shoot maturation phase is important for growing mangoes because it precedes the floral induction, when plants are under stress caused by high temperatures and low water availability. Abiotic could be alleviated using plant biostimulant which alters phytohormone carbohydrates biosynthesis. Thus, an experiment was conducted to evaluate use a containing Ascophyllum nodosum induce of mango cv. Palmer grown in semi-arid environment. experimental design consisted randomized blocks with four...

ABSTRACT Irrigated fruit crops have an important role in the economic and social aspects region of Sub-middle São Francisco River Valley. Thus, aim this study was to evaluate soil salinity productive mango crop, cv. Tommy Atkins, fertigated with doses potassium chloride (KCl) sulfate (K2SO4) during two crop cycles (from January March 2014 from 2015). The experiment carried out a strip-split-plot design five (50, 75, 100, 125 150% recommended dose) as plots sources (KCl K2SO4) subplots, four...

Abstract Adequate fertilizing management is crucial to reach high mango yields that demand a well-defined fertilizer management, including micronutrient such as boron which more difficult due the narrow range between deficiency and toxicity. This way, an experiment was carried out evaluate fruit production quality of cv. Palmer function in Brazilian semiarid. The experimental design randomized blocks with six treatments (strategies for fertilizing), follows: T1 = five sprays H3BO3 (two first...

Adequate nutritional status is fundamental for the fruiting process of mango trees ( Mangifera indica L.). In this context, plant biostimulants are substances that promote physiological and changes, benefiting production. The present study evaluated effect on fruit production ‘Kent’ trees. experiment was carried out in Brazilian semiarid region over 2 consecutive years, 2016 2017. Leaf treatments with were applied three phases (preflowering, beginning flowering, full flowering) during both...

Soils under natural conditions have heavy metals in variable concentrations and there may be an increase these elements as a result of the agricultural practices adopted. Transport soil mainly occurs forms dissolved solution or associated with solid particles, water being their main means transport. In this context, aim study was to evaluate metal micronutrient content grapevine plant fruit different irrigation strategies. The experiment carried out Petrolina, PE, Brazil. treatments...

Modelos mecanísticos baseados em princípios de transporte solutos pode ser grande utilidade para prever os impactos do cultivo florestas plantadas, por exemplo, com eucalipto sobre o capital e fluxo nutrientes no solo. Dentre as variáveis entrada demandadas tais modelos, tem-se valores das constantes Vmax, Km Cmin da cinética absorção iônica. Assim, objetivos presente trabalho foram determinar K, Ca Mg, bem como avaliar respectivas eficiências nutricionais clones eucalipto. O estudo...

Improper land use has lead to deterioration and depletion of natural resources, as well a significant decline in agricultural production, due decreased soil quality. Removal native vegetation make way for crops, often managed inadequately, results disruption, nutrient availability, decomposition organic matter, making sustainable production unviable. Thus, the aim present study was evaluate impact growing irrigated mango (over 20 year period) on carbon (OC) stocks fractions matter (SOM)...

Soil organic matter (SOM) plays an important role in carbon (C) cycle and soil quality. Considering the complexity of factors that control SOM cycling long time it usually takes to observe changes stocks, modeling constitutes a very tool understand forest soils. The following hypotheses were tested: (i) (SOC) stocks would be higher after several rotations eucalyptus than low-productivity pastures; (ii) SOC values simulated by Century model describe data better mean observations. So, aims...

Due to the importance of accurate information on soils for agricultural production, quantitative techniques estimate classes and/or soil properties have been developed increase these maps quality. This manuscript was map an agronomic experimental area using geostatistical tools assist in allocation and management experiments. The study is located Federal University São Francisco Valley, Petrolina County, Pernambuco state, Brazil. Mapping consisted a profile sampling grid with 51...

Abstract Correct management of potassium (K) fertilization is fundamental importance for mango orchards, and K one the most exported yield-limiting nutrients. Thus, an experiment was carried out to evaluate production physical-chemical characteristics Tommy Atkins fruits under fertigation with different doses chloride sulfate in semi-arid region. The experimental design randomized blocks split plots, using five (50, 75, 100, 125 150% recommended dose) plots two sources (potassium – KCl...

Para a implantação da fruticultura, o emprego de mudas boa qualidade é fundamentalmente importante. Neste contexto objetivou-se avaliar diferentes níveis depleção água no substrato definidos como uma fração massa capacidade container (MCC), bem doses Osmocote® (15-9-12) na produção maracujazeiro amarelo em tubetes. O delineamento experimental foi blocos casualizados esquema parcelas subdivididas com quatro repetições, sendo definido parcela fator nível (5, 15, 25 e 35% MCC) subparcela dose...

Accelerated land use changes have been observed in Brazil. In Northeast, the Caatinga (native vegetation) has replaced by fruit production, especially mango and grapevine cultivation. Land changes, tied to management techniques, can change soil chemical physical attributes. Thus, present study aimed evaluate impact of irrigated cultivation attributes relation native semi-arid region. The was carried out at Boa Esperança Farm located Petrolina, Pernambuco State, areas under samples 0-10 10-20...

O sucesso da implantacao fruticultura depende do emprego de mudas boa qualidade, tendo em vista que o crescimento inicial das mamoeiro tem relacao com a precocidade e qualidade na producao dos frutos. Neste contexto, objetivou-se avaliar diferentes niveis deplecao agua no substrato definidos como uma fracao massa capacidade container (MCC), bem doses fertilizante Osmocote® (14-14-14) formacao formosa tubetes. delineamento experimental foi blocos casualizados esquema parcelas subdivididas...

ABSTRACT This study aimed to evaluate the effect of nitrogen (N) and potassium (K) fertilization in yield contents macronutrients heliconia plants (Heliconia psittacorum x Heliconia spathocircinata Aristeguieta) cv. Golden Torch. The experiment was set a randomized block design, 4 factorial, corresponding N doses (0, 120, 180 240 g hole-1) K K2O with four replicates five rhizomes per plot, under field conditions. After one year cultivation, (number flower stems square meter) leaf N, P, K,...

Abstract Soil sampling is a fundamental procedure in the decision making regarding management of soil, thus, plan should represent as accurately possible evaluated crop field. Therefore, objectives this study were to suggest soil approach and point allocation using spatial analyses compare classic statistic method irrigated mango orchards Brazilian semi-arid region. The experiment was carried out three commercial located region São Francisco Valley, Brazil. samples collected 0-0.2 m 0.2-0.4...