RESUMOAtualmente, mudas de diversas fruteiras são produzidas no cultivo protegido, com o uso de substratos aliados a adubações. Há necessidade de substrato de fácil aquisição e que proporcione mudas de boa qualidade. Sendo assim, o objetivo deste trabalho foi avaliar diferentes substratos comerciais e doses de nitrogênio sobre o desenvolvimento de mudas de maracujazeiro em condições protegidas. Os tratamentos consistiram de três substratos comerciais (Bioplant ® , Fibra de coco e Vivato ® ) e quatro doses de nitrogênio (0; 150; 300 e 600 mg dm -³ N). Após 120 dias, avaliou-se a altura de planta, número de folhas, peso da matéria seca de parte aérea (MSPA), raizes (MSR) e total (MST) e o teor de clorofila (SPAD). Na altura das plantas, a Fibra de Coco diferiu significativamente dos demais substratos. A altura máxima de 122 cm foi obtida na dose de 600 mg dm -³ de N. No número de folhas a Fibra de coco proporcionou a melhor resposta com média de 20 folhas, sendo superiores Bioplant ® e Vivatto ® . Na MSPA a Fibra de Coco e Bioplant ® foram superiores em relação ao Vivatto ® , e na avaliação de MST observou-se o acúmulo máximo de 19 g de matéria seca das mudas na dose de 600 mg dm -³ de N nas plantas desenvolvidas com Bioplant ® . No teor de clorofila os melhores resultados foram obtidos no substrato Bioplant ® com média de valores SPAD de 40, mas não houve diferença para a Fibra de coco. Palavras-chave: cultivo protegido; nitrogênio; nutrição mineral; Passiflora edulis Sims. SUBSTRATE AND NITROGEN FERTILIZER ON SEEDLING PRODUCTION OF YELLOW PASSION FRUIT IN PROTECTED CONDITIONS ABSTRACTCurrently, various fruit seedlings are produced in the protected cultivation with the use of appropriate substrates coupled the fertilization. No need of looking for easy acquisition substrate that provides good quality seedlings. Thus, the objective of this work was to evaluate commercial substrate and doses of nitrogen on the development of seedlings of passion of high stature in protected conditions. The treatments consisted of three commercial substrates (Bioplant ® , Coconut Fiber and Vivato ® ) and four doses of nitrogen (0; 150; 300 and 600 mg dm -³ N). After 120 days, evaluated plant height, number of leaves, dry matter weight of shoot (MSPA), root (MSR) and total (MST) and the chlorophyll content (SPAD). In plant height of plants, the Coconut Fiber, differed significantly from other substrates. The maximum height of 122 cm was obtained at a dose of 506 mg dm-³ N. The number of leaves the Coconut Fiber has provided the best response with an average of 20 leaves, being superior to the substrate Bioplant ® and Vivatto ® . On MSPA Coconut Fiber and Bioplant ® were superior in relationship the Vivatto ® , and evaluation of MST has been observed maximum accumulation of 19 g of dry matter of seedlings at a dose of 600 mg dm -³ N in plants development with Bioplant ® substrate. On chlorophyll content feature the best results were obtained in the Bioplant ® substrate with average of SPAD values of 40, but there was no gap to on Cocon...

The objective this work was to evaluate specific economic data of the production of yellow passion fruit under influence of different doses of NPK, in the form of N, P2O5 and K2O, in an area with incidence of virose in the city of Presidente Prudente, State of São Paulo. The following doses of NPK were evaluated: N (150 to 1200 kg ha-1), P2O5 (200 to 1600 kg ha-1) and K2O (100 to 700 kg ha-1). Miyake et al. (2016) describe the methodology used in the formation of seedlings, fertilization and cultural treatments of passion fruit. The data used in the economic analysis were: productivity, commercial production, percentage and fruits of each commercial classification, cost of production and profitability of passion fruit. At the economical part, structures of the COE and TOC and four indicators of profitability were used. It was observed percentage difference in the operational cost of production of 4.0% between the highest and the lowest dose of N, of 5.8% among doses of P2O5 and 1.7% among doses of K2O. The total operating cost ranged from $29,119.77 to $31,113.09 per hectare. The profitability indicators were not favorable. It was concluded that the region of Presidente Prudente-SP, in areas with an incidence of viral infection, it is not recommended the plantation of passion fruits. However, at times with high selling price of fruit (average above R$ 1.95 kg-1), the dose of NPK indicated refers to 300 kg of N, 400 kg of P2O5 and 500 kg of K2O ha-1.

The production costs of passion fruit have increased in recent year mainly due to use of technologies such as different fertilizations, plant density, use of agrochemicals in the protection of plants, production of larger seedlings, among other seeking to increase production. Thus, it is important to know what is the real cost of these techniques to find the financial balance of the production system for increased profitability. The aim of this study was to evaluate the influence and impact of nutritional management on economic terms and production costs of yellow passion fruit. The evaluated parameters were: productivity, commercial production, percentage of commercial fruit, commercial fruit classification, production costs and profitability index of passion fruit vines in the municipality of Presidente Prudente, Brazil. Different N rates (150, 300, 600 and 1200 kg ha-1), P 2 O 5 (200, 400, 800 and 1600 kg ha-1) and K 2 O, (100, 300, 500 and 700 kg ha-1) were applied. The economic study showed that the production cost increased with the doses of fertilizer. However, this additional economic cost was not reflected in increased productivity per area with the NPK doses. The minimum price for selling passion fruit should be USD 0.26 per kilogram of fruit to obtain economic optimization of entrepreneurial activity. There was positive response in the production for classification of fruit (gauge 2, 3 and 4), commercial production, percentage of commercial fruit and with use to N and K 2 O. Operating profit and profitability index were more satisfactory in the application of 300 kg of N, 200 kg of P 2 O 5 and 300 kg of K 2 O per hectare. In the nutritional management on cost of production showed that there was a percentage difference in operating production cost of 4.52% between the highest and lowest dose of N. 6.40% between doses of P 2 O 5 and 2.52% between doses of K 2 O. The biggest difference in production cost was between the tested and recommended doses of 4.04%, 5.81% and 1.71% per treatment at different levels of N, P and K, respectively. The total operating cost ranged from USD 9,049.76 to 8,4699.97 per hectare.

The production of sugarcane is constantly growing in Brazil, and by the 2016/2017 season, it is estimated to have reached 691 million tons. However, productivity has not shown significant increase, this is due largely to inadequate nutritional supplementation of sugarcane plantations, especially the micronutrients. The aim of this study was to evaluate the effect of micronutrients application on the billets and quality of sugarcane in the groove of sugarcane plantation. The experiment was carried out in randomized blocks of six treatments, with application of micronutrients sources in the planting furrow, with 4 repetitions. Number of stems, leaf nutrient content, sugarcane yield and total recoverable sugar (ATR) of sugarcane were evaluated. The use of micronutrients Cu, Mn and Zn chelated associated with sources of K 2 O, B and Mo promoted increased productivity of billets (TCH) 10 and 15% with doses of 1.0 and 1.5 L ha -1 complex nutrient respectively. The exclusive application of Boric Acid and Zinc Sulphate in dosages of 2.03 kg ha -1 did not increase the productivity of sugarcane. Nutrient sources applied on billets did not result in increases in technological quality of sugarcane, assessed by ATR.

The research had as objective to study the influence of the doses of nitrogen, phosphorus and potassium on soil fertility and nutritional status of yellow passion fruit plants. The experimental design was in randomized blocks in an incomplete fractioned factorial 1/2 (4 × 4 × 4), with four doses of N (150, 300, 600 and 1200 Kg-1 ha-1 yr-1 N); four doses of P2O5 (200, 400, 800 and 1600 kg-1 ha-1 yr-1) and four doses of K2O (100, 300, 500 and 700 kg-1 ha-1 yr-1). The fertilizers used were the ammonium nitrate = 32% N; triple superphosphate = 44% P2O5 and potassium chloride = 60% K2O. In the fertility of the nitrogen fertilization increased the content of phosphorus and sulfur. The doses of P2O5 increased the concentration of P in the soil. The doses of K2O influenced the increase in the content of K in the soil in the harvest 2013/2014. There was an interaction of the doses of N and K2O in the availability of K in the soil in the harvest 2012/13 with the maximum levels of K, in the doses of 200-400 kg N ha-1 and 600 to 700 kg ha-1 of K2O. In the nutritional state the yellow passion fruit plants was influenced by the doses of N for the sulfur content of the leaves. The maximum content of S leaf concentration of 3.63 g kg-1 was obtained in the dose estimated at 1120 kg ha-1 of P2O5.

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The aim of this work was to evaluate commercially available substrates and levels of potassium on the development of passion fruit seedlings in protected conditions. The experiment was conducted at the city of Presidente Prudente, São Paulo within the period from April to September of 2010. The treatments were made with three different substrates (Bioplant ® , Coconut fiber and Vivatto ® ) and four levels of potassium (0, 150, 300 and 600 mg -1 of K dm -³), arranged in a 3 × 4 factorial design with five repetitions. The following parameters were analyzed 120 days after seedlings transplanting: Plant height, number of leaves, length of root, dry matter of shoot, root, total matter and chlorophyll content. The dose of 600 mg dm -3 of K provided the highest seedling height, 85.83 cm independent of the substrate. The commercial substrates Bioplant ® and Coconut fiber with a dose of 150 mg dm -3 of K influenced the maximum accumulation of total dry matter of seedlings. However, Vivatto ® substrate provided the highest accumulation of total dry matter with application dose of 600 mg dm -3 of K. Mineral potassium fertilization in the substrate Bioplant ® and Coconut fiber with a dose of 150 mg dm -3 reduced the length of passion fruit's roots.