AVALIAÇÃO DA APLICAÇÃO DE BIOFERTILIZANTE NA CULTURA DO MILHO: CRESCIMENTO E PRODUÇÃO

O presente trabalho teve por objetivo avaliar os efeitos de concentração e intervalos de aplicação de biofertilizante nos componentes de produção de milho. O trabalho foi realizado, em condições de campo, na Escola Agrotécnica do Cajueiro, no Centro de Ciências Humanas e Agrárias (CCHA), pertencente à Universidade Estadual da Paraíba; O delineamento Experimental utilizado foi o de blocos casualizados, com 09 tratamentos, num esquema fatorial 3x3, com 4 repetições, contendo 26 plantas por unidade experimental, totalizando 234 plantas/bloco e 936 plantas experimentais. Foram estudados os efeitos de 3 concentrações de biofertilizante (C1 = 1% ou 10 ml L-1; C2 = 2% ou 20 ml L-1 e C3 = 3% ou 30 ml L -1) e de 3 intervalos de aplicação (I1 = 5 dias; I2 = 10 dias e I3 = 15 dias). A adubação foi iniciada 15 dias após a germinação. O presente trabalho permitiu as seguintes conclusões: A Utilização de concentrações de biofertilizante em até 30 ml/L não afetou significativamente as variáveis de crescimento e de produção do milho; A concentração de biofertilizante de 30 ml/L evidenciou maiores valores de diâmetro transversal da espiga, peso verde da raiz e peso seco da parte aérea da planta, embora estatisticamente não significativos; A produção do milho teve um melhor desempenho com a aplicação de biofertilizante na concentração de 20 ml/L mais notadamente no número de espigas por planta; O crescimento da planta teve um melhor desempenho quando foi aplicado o biofertilizante no intervalo de 15 dias

Níveis de adubação para a cultura do milho Safrinha

The objective of this research was to evaluate the effect two hybrids of maize, cultivated on "safrinha" conditions, in different rates of 08-28-16 formula. The treatments consisted of two hybrids of maize (DKB747 e CO32) cultivated in no-tillage system (SPD) and five rates of fertilizer 08-28-16 (100, 200, 300, 400 e 500 kg ha(-1)). The randomized block design was used, with subdivided splots and four replications. The maize was sowed on 02/03/2006 using seeder pneumatic of mechanics traction, with four individual lines, spaced of 0.45 m During maize flowering period, morphologic components were evaluated; the harvest occurred on 150 days after the sowing, when the production components were evaluated. The hybrid of maize DKB747 showed greater efficiency, while the hybrid of maize CO32 was more responsive to rates used. NPK rates on 08-28-16 fomula above 300 kg ha(-1) are not necessary to the hybrid CO32 cultivated on "safrinha" conditions, in Botucatu region, state of São Paulo.O objetivo deste trabalho foi avaliar a resposta de duas cultivares de milho, cultivado na safrinha, à diferentes doses da fórmula 08-28-16. Foram utilizados dois híbridos de milho (DKB747 e CO32) semeados em Sistema Plantio Direto (SPD) e submetidos a cinco doses da fórmula 08-28-16 (100, 200, 300, 400 e 500 kg ha-1). O delineamento foi o de blocos casualizados, em parcela subdividida, com quatro repetições. O milho foi semeado no dia 02/03/2006 utilizando-se uma semeadora pneumática de tração tratorizada, com quatro linhas individuais espaçadas de 0,45 m. No estádio de florescimento, foram avaliados os componentes morfológicos; a colheita foi efetuada aos 150 dias após a semeadura, ocasião em que foram avaliados os componentes da produção e produtividade. O híbrido DKB747 apresentou maior eficiência, enquanto o híbrido CO32 mostrou-se mais responsivo às doses utilizadas. A utilização de doses acima de 300 kg ha-1 de NPK na formula 08-28-16 não se faz necessário para o híbrido CO32 cultivado na safrinha, na região de Botucatu, SP

ECONOMIA DE ÁGUA EM IRRIGAÇÃO POR ASPERSÃO BASEADO NA DEFINIÇÃO DA VELOCIDADE DE INFILTRAÇÃO

Using data from basic speeds of infiltration (VBI), obtained in soils of Coastal Tabuleiros the city of Mal. Deodoro, for aluminum and speed of infiltration for projects (VIP), calculated using the techniques Fashion (Mo), Medium Harmonic (MH), Geometric (MG), simple arithmetic (MAS), Quadrática (MQ), Cúbica ( MC) and Biquadrática (MB), in addition to the Median (Md), was carried out studies on water-saving irrigation by sprinkling compared to the volumes obtained on the basis of these techniques and there is the potential for the runoff. It was the conclusion that the economy of water increased in the following order of technical definition of VIP: MB, MC, MQ, BUT, MG, Md, MH, Mo. Thus, the technical definition of the VIP which saves more water for irrigation is the Fashion

CRESCIMENTO E PRODUÇÃO DO COQUEIRO ANÃO VERDE FERTIRRIGADO COM NITROGÊNIO E POTÁSSIO

A field experiment was developed in the period of April of 2000 to May of 2002, at the Experimental Station of Jiqui pertaining to the Empresa de Pesquisa Agropecuária do Rio Grande do Norte - EMPARN, Parnamirim city, state of Rio Grande do Norte. The work had as objective to evaluate the effects of nitrogen and potassium applied through irrigation water on the vegetative behavior and productive of green dwarf coconut tree (Cocos nucifera L). The treatments had consisted of the combination through the experimental matrix of Pan Puebla III, 5 doses of N and 5 doses of K2O both oscillating of 135 the 2565g plant -1 year -1 derived of the urea and potassium chloride. The used experimental design was of blocks at random with 4 repetitions and 5 plants for plots totalizing 40 experimental units. The plantation was made in the triangular spacing of 7.5 m between plants and 7.5 m between lines. During the 5th year of culture, from April of 2001 to May of 2002 was quantified the number of fruits in the 13 harvest carried out. The referring variables to the vegetative development, height and circumference of stem, diameter of the top and leaf number, had been measured in May of 2002, in the end of the experiment. The stem circumference increased linearly with the increase of the doses of N and of quadratic form with the doses of K with the biggest value for the dose of 1350 g plants -1 year-1. The leaf number answered only the nitrogen applications. The growth in stem height had influence of N and K, however, data did not adjust to no mathematical model. The diameter of the top of the green dwarfed coconut palm did not suffer significant interference of no applied fertilizer through irrigation water. The number of fruits increased quadratically with the N and K doses. The maximum physical efficiency of the production, 154.75 fruits plants -1 year -1, it was reached with the doses of 1437 g plants -1 year -1 of N and 1553 g plants -1 year -1 of K

COMPORTAMENTO DA MANIÇOBA (Manihot pseudoglaziovii muell arg) SOB DIFERENTES ESPAÇAMENTOS E ADUBAÇÕES

Manihot pseudoglasiovii is considered an excellent forage, as for its nutritional value as for the high degree of palatability. Like as other native plants of the semiarid regions it, can be considered a resource of important strategical use. It is an alternative not only for the dry period the entire year, in a conservation system. This work had as objective of study the growthof maniçoba in relation is density (1,5 x 1,5 and 2 x 2) and fertilization (manure of bovine, goat/sheep and without fertilization). It was used an experimental desing of blocks casualizaed with treatments distributed in 2 x 3 factorial. The experiment was out through in the Department of Zootecnia of Center of Agrarian Sciences of the UFPB, in Campus II in Areia-PB. There had been evaluated morphologic characteristic (Height of plant, diameter of caule, area of the pantry, leaf number and number of bifurcations) and productive characteristic (leaf production, production of branches, production of total fitomass substance and total dry substance)The analyses of variance were made employng the SAEG program. The and analyses of regression of the morfological characteristics on the time. Were mande visig SAEG program too. In accordance with the results obtaimed in this study, the different densities had not presented significant difference. However by total production for area the results were favorable to the higher density (1.5 x 1.5). Already the fertilizations with bovine and goat/sheep manures, although had shown no between them difference, had present statistical difference from treatment without fertilization, shoung higher pr

ESTIMATIVA DA ÁREA FOLIAR DE JUAZEIRO POR DIMENSÕES LINEARES DO LIMBO FOLIAR

Com o objetivo de obter equações que, através de parâmetros lineares dimensionais das folhas, permitisse a estimativa da área foliar de juazeiro, estudaram-se relações entre a área foliar real e parâmetros dimensionais do limbo foliar, como o comprimento ao longo da nervura principal (C) e a largura máxima (L), perpendicular à nervura principal. As equações lineares simples, polinomiais e potencias obtida podem ser usadas para estimação da área foliar. Do ponto de vista prático, sugere-se optar pela equação linear simples envolvendo o produto C x L, considerando o coeficiente linear igual a zero, a qual apresentou a menor Soma de Quadrados do Resíduo. Desse modo, a estimativa da área foliar de juazeiro pode ser feita pela fórmula AF = 0,7931 x (C x L), que equivale a tomar, 79,31% do produto entre o comprimento ao longo da nervura principal e a largura máxima, com um coeficiente de correlação de 0,9937

INSECTOS ASOCIADOS A Alpinia purpurata (Vieill.) K. Schum. (ZINGIBERACEAE) EN MACEIÓ Y RIO LARGO (AL), BRASIL

Due the fast growing in flowers and ornamental plants production and their high export potential, it is important to identify the insects species associated with Alpinia purpurata (Vieill.) K. Schum crops and to establish their role in this agroecosystem/production system The insects were collected from A. purpurata cv. Pink Ginger and Red Ginger plants cultivated in two farmswith different agroecological characteristics, located in two recognized tropical flower production areas/regions, Maceió and Río Largo cities/localities, Alagoas state, during one year. They were identified and its frequency analyzed according with a numerical scale. According to the results was collected 790 insects of which 69 were identified to specific level, belonging to 59 families of 9 ordens. Results showed Hymenoptera individuals as the most frequent, mainly predator ants and/or associated with phytophagous insects (sucking), besides natural enemies, followed by Hemiptera and Lepidoptera orders, which involved recognized agricultural pests. Insects belonging to the order Odonata and Orthoptera were found less frequently