Adriana Novais Martins

Crescimento e produtividade de nogueira-macadâmia em consórcio com cafeeiro arábica irrigado

The objective of this study was to evaluate the growth and yield of macadamia nut (Macadamia integrifolia) cultivars in an intercropped system with irrigated coffee (Coffea arabica). The experiment was carried out in a completely randomized design with ten replicates. Six macadamia cultivars, from which three Brazilian (IAC 4-12B, IAC 4-20, and IAC 9-20) and three Hawaiian (HAES 344, HAES 660, and HAES 816) ones were used. In the first four years of production, evaluations were done for: plant height, canopy and stem diameter, number of nuts per plant, nut average weight, almond medium weight, nut production per plant, recovery rate, and almond production per plant. The Brazilian cultivars, especially IAC 4-20, showed a lower height, but with a larger canopy diameter. The Brazilian cultivars are more productive, among which IAC 4-12B is outstanding.

Nutrição e produtividade da nogueira-macadâmia em função de doses de nitrogênio

O objetivo deste trabalho foi avaliar a influencia de doses de nitrogenio na nutricao mineral e na produtividade da nogueira-macadâmia (Macadamia integrifolia). O experimento foi conduzido durante tres anos agricolas, em Jaboticabal, SP. Utilizou-se o delineamento experimental de blocos ao acaso, com quatro repeticoes. Foram avaliadas cinco doses de N (0, 50, 100, 150 e 200 kg ha-1 por ano), aplicadas na forma de ureia. O aumento nas doses de N aumentou o teor do nutriente nas folhas e a produtividade de nozes e amendoas. Os teores de Ca, Mg e S diminuiram e os de Fe e Mg aumentaram linearmente com a adubacao nitrogenada. A produtividade de nozes e de amendoas correlacionou-se positivamente com o teor de N nas folhas, e a faixa de 14 a 18 g kg-1 foi a que possibilitou as maiores produtividades. A dose de 150 kg ha-1 de N por ano proporciona maior produtividade de noz, sem reduzir a taxa de recuperacao de amendoas.

Biomass production and essential oil of rosemary (Rosmarinus officinalis L.) in function of the height and interval between the cuts

Rosemary is an exotic plant and the interest in its cultivation has been growing along the years, because it can be used for medicinal or aromatic ends, however the agricultural knowledge about the species is quite limited. The goal of this research was to evaluate the influence of the cutting height and of the interval of these cuts on the biomass production and on the yield of the rosemary essential oil. The experiment was conducted at the Agronomical Institute, in Campinas - SP, from January 2006 through July 2007. It was organized in a completely randomized design with 8 treatments in a 2 x 4 factorial system, with two cutting heights (20 and 40 cm) and four intervals between cuts (60, 80, 100, 120 days) and three replications. Characteristics such as plant height, dry mass of the aerial part, yield and quality of its essential oil were evaluated. It was observed that longer intervals among cuttings provided longer height of the plant and greater dried mass of the aerial part. The yield and the quality of the essential oil were not affected throughout the experimental period.

Custo de produção do maracujá-amarelo (Passiflora edulis)

The objective of this work was analyze the economic culture of yellow passion fruit (Passiflora edulis) in Marilia-SP, the 2010/2011 crop year. Structures of effective operational cost and total operational cost of the culture per area unit were used to the phase of implementation and management of the crop per unit area and five indicators of profitability. Identified a total production cost of US

Irrigação e adubação potássica via fertirrigação em bananeira 'willians': produção e qualidade de frutos

23,743.19 per hectare or US

Estimativa de produção de laranja valência pela adaptação de um modelo agrometeorológico

1.19 per pound of fruit. The items of cost effective operating system that most burdened production corresponded to the operations of machinery (31.1%) and labor (23.5%). The profitability indicators proved to be unfavorable to the production system considered in due mainly to the high price of inputs and practices to control diseases. There is need for technical adjustments related to the handling of the crop plant to reduce the total cost of production in order to make the activity profitable.

Irrigação e certificação da cafeicultura na Região Centro-Oeste de São Paulo

The application of nutrients through irrigation water increases their efficiency of utilization by plants. The objective of this study was to evaluate the effects of potassium fertilization and irrigation on the yield and fruit quality of banana cv. Willians, in the Medio Paranapanema Region, Sao Paulo. Four water regimes were evaluated: rainfed, 0.7 of the reference evapotranspiration (ETo), 1.4 ETo and 2.1 ETo, combined with four doses of potassium: 0, 300, 600 and 900 kg ha year-1 K2O, applied weekly by fertigation. Under rainfed, potassium fertilization was applied during the rainy season, split into four times. Potassium fertigation affects positively both the production and the quality of the fruits of banana cv. Willians. In addition, the fertigation increased nutrient use efficiency when compared to fertilization under rainfed conditions.

Adição de torta de mamona em substratos na aclimatação de mudas micropropagadas de bananeira

YIELD PREDICTION OF ORANGE CULTIVAR VALENCIA THROUGH ADAPTATION OF AN AGROMETEOROLOGICAL MODEL The influence of the hydric factor influence and the previous year yield relative to the potential (Yaa/Yp), yield was evaluated for orange cultivar Valencia/Cravo (Citrus sinensis Osbeck). The stages of dormancy, flowering and fruit set were considered in a multiplicative mathematic agrometeorological model with different sensitive indices (λ-values). Meteorological, phenological and crop yield data of an orchard in Matao, SP, Brazil, were analyzed. The obtained results indicated better performance of the model when the periods of dormancy were established in August - September, flowering in October November and fruit set in December - January. The magnitude of the sensitive index values showed that flowering (Oct - Nov) is the most sensitive period for water stress. In the model validation it was observed a good performance, with R 2 of 0.81 and d-index of agreement of 0.95.

Avaliação do cloreto de benzalcônio no controle da ferrugem (Hemileia vastatrix Berk. & Br.) do cafeeiro (Coffea arabica L.)

An unsatisfactory profitability has led to the gradual decline of the coffee plantations in Sao Paulo. Among the alternatives that arise for solving this problem, two stand out: the irrigation of crops and certification of properties. Even in areas considered suitable for cultivation of arabica coffee (Coffea arabica L.), the use of irrigation can promote an increase in grain yield. In addition, the product certification promotes their differentiation in the market and can improve the economic results of the activity. This study aimed to evaluate the development and productivity of coffee crops subjected to irrigation or not, comparing economic data in the marketing of coffee certified or not, under the conditions of the mid-west region of Sao Paulo state. The field experimental design was in randomized blocks with two treatments (with and without drip irrigation) and ten repetitions. The costs of production and profitability by selling the final product were calculated. The irrigation increased the development and productivity of coffee. The return on investment took place after the third harvest. Irrigation combined with the sale of certified coffee provided financial balance 1,192% higher than the coffee is not irrigated and non-certified.

Abortamento de frutos da nogueira macadâmia sob influência da adubação mineral

ABSTRACT: The use of micropropagated banana tree seedlings offer genetic and phytosanitary qualities, favoring the development, installation and uniformity of the yield and it is very important for the commercial exploration of banana fruits. The objective of this study was to evaluate the influence of castor oil plant pie added to the substrate in the acclimatization of micropropagated banana plantlets cv. ‘Willians’. It was used a completely randomized design, with 10 treatments, being 2 substrates and 5 dosages of castor oil plant pie (0; 6; 12; 18 and 24 g for each recipient). The substrate Vivatto Slim Plus® showed the best development of the plants in the acclimatization processes. Dosages above 12 g of castor oil plant pie for each plant mixed to the substrate are not recommended in the acclimatization of banana tree seedlings.Index terms: Musa sp., micropropagation, banana. INTRODUCAO A instalacao de um bananal comercial a partir de mudas de boa qualidade e fundamental para al-tas produtividades, longevidade e lucratividade do empreendimento (FURLANETO et al., 2007). As mudas micropropagadas de bananeira necessitam de um periodo de aclimatizacao em viveiros, onde permanecem em recipientes com substratos ate atingirem o porte ideal para o transplantio no campo (NOMURA et al., 2009). Varios tipos de substratos podem ser utiliza-dos no processo de aclimatizacao das mudas, desde que apresentem caracteristicas fisicas, quimicas e biologicas que proporcionem o rapido crescimento vegetativo (YAMANISHI et al., 2004). De acordo com Silva et al. (2001), substra-tos compostos por palha ou casca de arroz carboniza-das, casca curtida de eucalipto ou pinus, vermiculita, areia e turfa sao indicados para a aclimatizacao de mudas. Atualmente, substratos comerciais, acresci-dos de fontes de nutrientes minerais ou orgânicas, sao amplamente utilizados. A torta de mamona e um residuo produzido durante o processo de extracao de oleo das sementes da planta. Estima-se que cada tonelada de semente de mamona processada produza cerca de 530 kg de torta de mamona (SEVERINO et al., 2005). Este subpro-duto da producao de biodiesel de mamona apresenta relacao C/N de 11:1 (KIEHL, 1985), com elevado teor de nitrogenio, podendo ser utilizado como fonte de nutrientes quando misturado ao substrato.