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Parcelamento e fontes de nitrogênio para produ??o de maxixe

DOI: 10.1590/S0102-05362010000200014

Keywords: cucumis anguria l., urea, ammonium sulfate, yield.

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Abstract:

the nitrogen sources and parceling were evaluated concerning to gherkin plant, nordestino cv., in the universidade federal da paraíba, brazil. the experimental design was the randomized block design in the factorial scheme 2 x 7, constituted of two nitrogen sources (urea and ammonium sulfate) and seven application times: a) (100% at sowing date; b) 100% 30 days after sowing (das); c) 100% 60 das; d) 50% at sowing date and 50% at 30 das; e) 50% at sowing date and 50% at 60 das; f) 50% at 30 and 50% at 60 dap; g) 33% at sowing date, 33% at 30 33% at 60 dap, with four replicates. the average weight of the fruits was inferior, 27 and 21 g, respectively, when the ammonium sulfate was 100% supplied at sowing and 100% at 60 das, as no alteration occurring in the urea source nor between those n sources. the yield of fruits of one plant (2.364 kg plant-1), the number of fruits of one plant (64 fruits plant-1) and fruit productivity (20.93 t ha-1) were significantly higher, when the nitrogen (ammonium sulfate source) was 50% parceled at 30 and 50% at 60 das. when urea was the nitrogen source, the yield of fruits of one plant (1.437 kg plant-1), the number of fruits of one plant (48 fruits plant-1) and the fruit productivity (12.66 t ha-1) were significantly higher, when it was parceled 50% at sowing date and 50% at 30 dae.

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