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Temporal variability of available phosphorus, potassium and magnesium in arable soil

机译:耕地土壤有效磷,钾和镁的时间变化

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The investigation is focused on the illustration of the temporal changes in spatial variability of the Mehlich III available phosphorus, potassium and magnesium in the 10.5 hapart of the whole 54 hafield, located near ?eský Brod. Soil is characterized as Orthic Luvisol. To estimate temporal variability of available nutrients, soil samples were taken in 2001–2003 four times per year (twice in spring and twice in the autumn periods). For the description of field variability of selected soil parameters coefficient of variation (CV), experimental variograms with fitted models and relative nugget effect parameters have been used. Three year results shows that the lowest temporal variability, characterized by relative nugget effect had available Mg (4–23%) and P (13–29%) and K (15–49%).
机译:该研究集中在说明位于菲斯凯布罗德附近的整个54公顷农田中的10.5公顷中,Mehlich III有效磷,钾和镁的空间变异的时空变化。土壤的特征是Orvisic Luvisol。为了估算可用养分的时间变异性,2001-2003年每年进行四次土壤采样(春季两次,秋季两次)。为了描述选定土壤参数的变异系数(CV)的田间变异性,已使用具有拟合模型和相对金块效应参数的实验变异函数。三年的结果表明,以相对的金块效应为特征的最低时间变异性具有可利用的Mg(4–23%)和P(13–29%)和K(15–49%)。

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