Aims: The objective of this study was to evaluate the coprolite production of native earthworms in a pasture with Brachiaria, with and without liquid-enriched biofertilization. Place and Duration of Study: The experiment was carried out between April of 2014 and August of 2015 at the Centro de Ciências Agrárias da Universidade Federal da Paraíba – UFPB. Methodology: A randomized complete block experimental design was used, with subdivided plots and four replicates, with a total of 40 plots in a 5x3x2 factorial arrangement, five grass species (Brachiaria brizantha, B. decumbens, B. humidicola, B. ruziziensise e B. brizantha MG5) and three sampling times, with and without liquid-enriched biofertilization. The plot area was composed of 50.0 m2 (10 m x 5 m) with subplots of 0.25 m2 (0.5 m x 0.5 m). Six foliar fertilization were performed in intervals of fifteen days, with three applications in the drought period and three applications in the rainy season. Each application consisted of 5% of biofertilizer (100 mL of biofertilizer diluted in 2 L of water), each plot received 2 L of biofertilizer. Results: In the dry season there was a significant difference in the means between the fertilization treatments, leading to the absence of fertilization, obtaining a better result, varying of 48, 24% in relation to the treatments that received fertilization, and there was no significant difference between the brachiaria. In the rainy season, it was verified that there was no significant difference in the means between the fertilization treatments, but there was a significant difference between the brachiaria. Conclusion: The study concludes that earthworm coprolites production is higher under pasture with B. MG5 during the dry season. In the rainy season, production increased under pasture with B. humidicula. Brachiaria fertilized with liquid-enriched biofertilizer provided lower results in the production of biogenic aggregates (earthworm coprolites). Under conditions of the present study, the hypothesis that the effect of the liquid -enriched biofertilizer increases the production of endogeic earthworm coprolites has not been proven.
Yellow passion fruit is a native tropical fruit tree whose cultivation has evolved very rapidly in Brazil; therefore, studies on the ecology of reproduction are needed. The study of pollen viability is an important tool to observe the male potential of the species. The objective of this study was to estimate pollen viability, pollen/ovule ratio and floral biology of Passiflora edulis Sims in organic cultivation located in Bananeiras, PB, and Brazilian. The study was developed in a completely randomized design, using ten flower buds in the pre-anthesis. The analyses performed in the biology laboratory
The umbuzeiro (Spondias tuberosa Arr. Cam.) is a fruit tree originating from the Caatinga biome that enjoys high acceptance in the market for in natura consumption or industrialized products; as a result, its cultivation has become of great importance for the region of Northeast Brazil. The objective was to evaluate growth, substrate temperature and chlorophyll indices in umbuzeiro seedlings at organic substrate levels and with organic foliar fertilizer (EcoLife®) applications. The experimental design was a randomized block with a factorial arrangement of 5×2, with four replicates and three plants per experiment unit. The factors corresponded to the proportions of the organic compost to the substrates (0, 25, 50, 75 and 100%), with and without foliar applications of 1% organic foliar fertilizer. The growth, leaf area and chlorophyll indices of the umbuzeiro seedlings were higher in the treatments with organic compost and foliar applications of organic foliar fertilizer.
This work compares the productivity and postharvest quality of C. sativum produced in organic and conventional systems. We used a randomized block experiment with five treatments and six repetitions each. Treatments comprised a negative control (C-: without fertilization), three doses of bovine manure as organic fertilization (35, 70, and 105 kg of N ha -1, named T35, T70, and T105 respectively), and a positive control (C+: 70 Kg of N ha -1 of conventional fertilization). We evaluated the morphometry, productivity, and physical-chemical characteristics of all plants used. The effect of organic fertilizer doses was analyzed using polynomial regressions. The differences among negative control, the positive control, and the organic fertilization with 70 Kg of N ha -1 of manure were tested with orthogonal contrasts. The doses of N used in organic fertilization influence the water and protein activity of C. Sativum leaves, promoting their decrease. The contrasts influenced the productivity, total fresh weight, fresh weight of the aerial part, dry weight of the aerial part, dry weight of the root, the total dry weight, water activity, titratable acidity, soluble solids, carotenoids, total chlorophyll, chlorophyll b, C. sativum was influenced by comparisons. The conventional production system using ammonium sulfate as the source of nitrogen promoted higher productivity and better postharvest quality in the culture of C. sativum. The period of implementation of bovine manure hampered the organic system. We suggest the fertilization with bovine manure before sowing, providing the necessary time for its mineralization during the cultivation cycle.
O maracujazeiro amarelo (Passiflora edulis Sims) é cultivado em países de clima tropical e subtropical, sendo o Brasil o maior produtor mundial, com a região Nordeste contribuindo com 62,30%. Objetivou-se avaliar o efeito da frequência de irrigação no consumo hídrico do maracujazeiro amarelo sem e com polímero hidroretentor em lisímetro. Os tratamentos foram distribuídos em blocos casualizados, com quatro repetições de duas plantas por parcela, usando o fatorial 2 x 3, referente ao solo sem e com polímero hidroretentore e três frequências de irrigação. As variáveis avaliadas, altura de plantas (AP), diâmentro de caule (DC), número de ramos produtivos (NRP), condutividade elétrica da água lixiviada (CE), consumo hídrico diário (Chd), umidade na capacidade de campo (Ucc), tempo inicial (TiD) e tempo final de drenagem (TfD). Assim, percebe-se que esses tratamentos com hidrogel® contribuíram para uma liberação de água para as plantas ao longo do tempo.O uso do hidrogel torna-se viável com o uso das frequências de irrigação ao crescimento do maracujazeiro amarelo (P. edulis), mesmo apresentando diminuição aos 63 dias após o transplantio no diâmentro do caule.O polímero é eficiente na retenção e liberação de água para as plantas, mantendo os menores consumo diários nas plantas de maracujá amarelo.O hidrogel torna-se um produto indispensável para a agricultura, portanto é necessário outras pesquisas que viabilize o custo-benefício desse insumo.
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