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首页> 外文期刊>Revista Brasileira de Fruticultura >Resposta de mudas de goiabeira a doses e modos deaplica??o de fertilizante fosfatado
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Resposta de mudas de goiabeira a doses e modos deaplica??o de fertilizante fosfatado

机译：番石榴幼苗对磷肥施用量和施用方式的响应

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The objective of the present study was to assess the development of guava tree cuttings in response to different doses and modes of application of phosphate fertilizer. The guava tree cuttings were transplanted in twin sets of pots (18 x 28 cm plastic bags) containing 2.8 dm3 of the subsoil of a Argisol (Ultisol, Soil Taxonomy; P resin = 1 mg dm-3) in such a way that half of the root system would remain in each pot. A 2x3x2 + 1 factorial arrangement (check, without phosphate) in 5 randomized blocks was used. Doses of 70, 140 and 280 mg of Pdm-3 of soil in form of triple superphosphate were applied in two different manners to the soil (distributed throughout the soil volume or placed only at a depth of 1/3) and in the roots (by dividing the dose equally between the two pots of the set or by applying the total dose to a single pot). The greatest accumulation of P and the greatest production of dry matter was observed 100 days after transplant in the plants that received phosphate fertilizer. The guava cuttings responded positively to phosphate fertilization, with the dose of about 100 mg of Pdm-3 of soil being sufficient for good plant development. Doses above of 200 mg Pdm-3 promoted a reduction of plant growth. Making phosphorus available to half or to the entire root system of the guava plant did not affect the supply of this nutrient to the cuttings or their development. The application of phosphate fertilizer distributed throughout the soil volume in the pot favored a better development of the root system and a lower development of the aerial part of the guava cuttings compared to application of the fertilizer localized at a depth of 1/3.
机译：本研究的目的是评估响应于不同剂量和施用磷肥模式的番石榴插枝的发展。将番石榴插枝移植到两套装有2.8 dm3的Argisol（Ultisol，土壤分类; P树脂= 1 mg dm-3）底土的花盆中（18 x 28 cm塑料袋）。根系将保留在每个盆中。在5个随机块中使用2x3x2 +1阶乘排列（检查，无磷酸盐）。分别以两种不同的方式将70、140和280 mg Pdm-3的三重过磷酸钙形式的土壤剂量施于土壤（分布在整个土壤中或仅以1/3的深度）。 （将剂量平均分配到一组的两个锅中，或将总剂量应用于一个锅中）。移植后100天，在接受磷肥的植物中观察到最大的磷积累和最大的干物质产量。番石榴插穗对磷酸盐施肥有积极的反应，大约100 mg Pdm-3的土壤剂量足以使植物良好生长。高于200 mg Pdm-3的剂量促进了植物生长的减少。向番石榴植物的一半或整个根系提供磷，并不影响向插穗或其发育提供这种养分。与定位在1/3深度的肥料相比，在盆栽的土壤中分布的磷肥的施用有利于根系的更好发育和番石榴cutting插的地上部分的较低发育。

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