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首页> 外文期刊>Engenharia Agrícola >Padr?o de distribui??o de K+, Ca++, Mg++ e P no solo de um pomar de citros em fun??o da fertirriga??o
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Padr?o de distribui??o de K+, Ca++, Mg++ e P no solo de um pomar de citros em fun??o da fertirriga??o

机译：柑橘果园柑橘果园土壤中K +，Ca ++，Mg ++和P的分布模式

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摘要

There is few knowledge of the localized fertigation effect (dripping and micro sprinklers irrigation) on nutrients distribution in tropical soils in a citrus orchard. The objective of this research was to evaluate the distribution of potassium (K+), calcium (Ca++), magnesium (Mg++) and phosphorus (P) in a tropical soil, under three water distribution patterns by localized irrigation method - micro sprinklers, single dripping line and double dripping lines per line of trees, and three irrigation depths -100%, 75% and 50% of the crop evapotranspiration (ETc) in an orange orchard. The sources of nutrients applied by fertigation were ammonium nitrate (N source), potassium chloride (K source) and phosphoric acid (P source) applied by fertigation parceled in 28 times. The results obtained showed that under the emitter, in the dripping treatments, there was depletion in Ca++ and Mg++ from the soil surface to 60 cm depth compared to prior levels to fertigation, whereas the P levels increased mainly in the 0 cm to 20 cm. In the micro sprinklers these effects were not observed, occurring more homogeneous distribution of these nutrients as in the transverse direction to the plant row as in the depth. The irrigation water applied by irrigation did not interfere the distribution of K+ applied by fertigation and Ca++ and Mg++ in the soil depth, but lower irrigation levels promote greater P concentrations in the most superficial layer of soil and larger water depths carry the P for deeper layers.
机译：柑橘果园热带土壤中营养分布的局部灌溉效果（滴水和微喷洒器灌溉）很少有所了解。本研究的目的是评估热带土壤中钾（k +），钙（Ca ++），镁（Mg ++）和磷（mg ++）和磷（p）的分布，通过局部灌溉方法 - 微喷洒器，单滴水每行树线和双滴水线，橙色果园中的三个灌溉深度-100％，75％和50％的作物蒸散（ETC）。施肥施用的营养素来源是硝酸铵（n个源），氯化钾（K源）和通过28次施用施用的磷酸（P源）。得到的结果表明，在发射器下，在滴水处理中，与现有水平施用相比，在土壤表面的Ca ++和Mg ++中耗尽，而P水平主要增加在0厘米至20cm。在微喷洒器中，没有观察到这些效果，在深度中与植物行的横向发生更均匀分布这些营养物。灌溉所施加的灌溉水不会干扰在土壤深度中施育和Ca ++和Mg ++施用的K +的分布，但较低的灌溉水平在最浅表的土壤中促进更大的P浓度，较大的水深携带P用于更深层面。

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