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Effects of Phosphorus Fertilizer Solubility on Pastures Yield and Quality in Andisols
Journal of Soil Science and Plant Nutrition ( IF 3.9 ) Pub Date : 2019-12-23 , DOI: 10.1007/s42729-019-00152-6 Erika Vistoso , Sergio Iraira , Patricio Sandaña
Journal of Soil Science and Plant Nutrition ( IF 3.9 ) Pub Date : 2019-12-23 , DOI: 10.1007/s42729-019-00152-6 Erika Vistoso , Sergio Iraira , Patricio Sandaña
Phosphate rock (PR) and triple superphosphate (TSP) are options for phosphorus (P) fertilization of crop and pasture production systems. However, to our knowledge, no studies have compared P sources with different solubilities in field trials to date. The aim of this study was to compare the effect of PR and TSP on forage yield, P uptake and nutritive quality of pastures growing in Andisols. Three experiments were conducted in southern Chile, analysing the factorial combination of two P sources (PR and TSP) and four P rates (0–328 kg P ha −1 ). Results showed that cumulative dry matter production in year 1, year 2 and total was significantly ( p ≤ 0.05) affected by P dose, time of cut and the interaction of both variables, indicating that PR is as effective as TSP in acid soils. The treatments did not show significant differences among themselves ( p ≥ 0.05) in foliar P concentration, P uptake, P apparent recovery efficiency and nutritive quality of pastures evaluated. The highest P apparent recovery efficiency was obtained with 22 kg P ha −1 and 44 kg P ha −1 independent of the phosphate fertilizer applied. A P demand factor of 2.7–3.1 kg P Mg −1 dry matter was estimated. All these information will be useful to improve P fertilization managements of pastures growing in Andisols.
中文翻译:
磷肥溶解度对牧草产量和品质的影响
磷酸盐岩 (PR) 和三重过磷酸钙 (TSP) 是作物和牧草生产系统磷 (P) 施肥的选择。然而,据我们所知,迄今为止,还没有研究在田间试验中比较不同溶解度的磷源。本研究的目的是比较 PR 和 TSP 对生长在 Andisol 中的牧草的草料产量、磷吸收和营养质量的影响。在智利南部进行了三个实验,分析了两个 P 源(PR 和 TSP)和四个 P 比率(0-328 kg P ha -1 )的因子组合。结果表明,第 1 年、第 2 年和总干物质的累积产量受 P 剂量、切割时间和这两个变量的相互作用的影响显着( p ≤ 0.05),表明 PR 在酸性土壤中与 TSP 一样有效。处理之间在叶面磷浓度、磷吸收、磷表观恢复效率和评估的牧场营养质量方面没有表现出显着差异(p≥0.05)。最高的 P 表观回收效率在 22 kg P ha -1 和 44 kg P ha -1 时获得,与施用的磷肥无关。估计 AP 需求因子为 2.7–3.1 kg P Mg -1 干物质。所有这些信息都将有助于改善 Andisol 中生长的牧场的磷肥管理。
更新日期:2019-12-23
中文翻译:
磷肥溶解度对牧草产量和品质的影响
磷酸盐岩 (PR) 和三重过磷酸钙 (TSP) 是作物和牧草生产系统磷 (P) 施肥的选择。然而,据我们所知,迄今为止,还没有研究在田间试验中比较不同溶解度的磷源。本研究的目的是比较 PR 和 TSP 对生长在 Andisol 中的牧草的草料产量、磷吸收和营养质量的影响。在智利南部进行了三个实验,分析了两个 P 源(PR 和 TSP)和四个 P 比率(0-328 kg P ha -1 )的因子组合。结果表明,第 1 年、第 2 年和总干物质的累积产量受 P 剂量、切割时间和这两个变量的相互作用的影响显着( p ≤ 0.05),表明 PR 在酸性土壤中与 TSP 一样有效。处理之间在叶面磷浓度、磷吸收、磷表观恢复效率和评估的牧场营养质量方面没有表现出显着差异(p≥0.05)。最高的 P 表观回收效率在 22 kg P ha -1 和 44 kg P ha -1 时获得,与施用的磷肥无关。估计 AP 需求因子为 2.7–3.1 kg P Mg -1 干物质。所有这些信息都将有助于改善 Andisol 中生长的牧场的磷肥管理。