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首页> 外文期刊>Horticultura Brasileira >Formas de aduba??o fosfatada influenciam o acúmulo de macronutrientes pela melancieira ‘Magnum’
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Formas de aduba??o fosfatada influenciam o acúmulo de macronutrientes pela melancieira ‘Magnum’

机译：磷酸盐施肥的形式通过西瓜“万能”影响大量营养素的积累

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Studies on nutrient uptake are important to understand nutritional needs of crops, which demand may also be influenced by fertilization management, particularly P fertilization. Thus, the aim of this study was to evaluate macronutrient accumulation and distribution in watermelon cv. Magnum, under two forms of phosphate fertilization. The experiment was carried out in a sandy-textured Argisol in Mossoró-RN. The experimental design was a randomized block design, arranged in split plot in time, with four replicates. We evaluated dose of 137 kg ha -1 of P 2 O 5 under two forms of fertilization [pre-planting (F0) and pre-planting + topdressing (F1)]. Triple superphosphate (SFT) was used for pre-planting applications and topdressing applications were done through fertigation using monoammonium phosphate (MAP, 34 kg ha -1 of P 2 O 5 ). Shoot samples (stem + leaf + fruit) of the experimental plots were collected at 27, 34, 40 and 55 days after emergence (DAE), and quantitative values of the accumulated nutrients were determined. In general, the highest accumulation of macronutrients occurred in the last third of the crop cycle. General accumulation of macronutrient was altered by fertilization form. An increase in P accumulation was observed using F1 fertilization, both in total and in fruits. Macronutrient accumulation rates increased during the evaluation period, except for Ca and Mg in F1 fertilization. F1 fertilization provided higher total accumulations of Ca and Mg, but the same did not occur for the accumulation in fruits.
机译：对养分吸收的研究对于理解农作物的营养需求非常重要，而肥料的需求也可能受到施肥管理（特别是磷肥）的影响。因此，本研究的目的是评估西瓜简历中大量营养素的积累和分布。万能，有两种形式的磷酸盐施肥。实验在Mossoró-RN的沙质Argisol中进行。实验设计是随机分组设计，按时间顺序排列，重复四次。我们评估了两种施肥形式的137 kg ha -1 P 2 O 5的剂量[种植前（F0）和种植前+追肥（F1）]。三重过磷酸钙（SFT）用于种植前的应用，追肥应用是通过使用磷酸一铵（MAP，34 kg ha -1的P 2 O 5）施肥完成的。在出苗后27、34、40和55天（DAE）收集实验样地的芽样品（茎+叶+果实），并测定累积养分的定量值。一般而言，大量营养素的积累最高发生在作物周期的后三分之一。施肥形式改变了常量养分的总体积累。使用F1施肥，无论是在果实中还是在果实中，都能观察到P积累的增加。除F1施肥中的钙和镁外，在评估期间，常量营养素积累速率增加。 F1施肥提供了较高的Ca和Mg总积累量，但果实中的积累没有发生相同的变化。

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