Abstract

A comparative assessment of the effect of long-term agricultural use of gray forest and meadow chernozemic soils on their phosphorus status is performed in stationary field experiments in the western Siberian forest steppe. The content of different phosphorus compounds in the soils of extensive and intensive agrocenoses is determined. The soils under study are characterized by higher total phosphorus concentrations (0.15–0.21% in the gray forest soils, 0.15–0.17% in the meadow chernozemic soils). The continuous use of phosphorus fertilizers significantly increases the level of highly mobile forms of this mineral element in the arable layer of gray forest soils to 12.5–14.6 mg/kg and meadow chernozemic soils to 22.1–26.6 mg/kg. The fractional size distribution analysis of inorganic phosphates showed a steady increase in the reserves of its compounds with a long-term positive balance. Phosphorus applied in excess of the removal was distributed among the first four fractions, where it was available to crop uptake both in action and in afteraction. All changes in phosphorus concentrations (both with a decrease and with an increase) are less pronounced on the initially more fertile meadow chernozemic heavy clay loam soils than on the gray forest soils, indicating its higher buffering capacity. The largest relative changes in the values of diagnostic indices are characteristic of the most mobile fractions of phosphorus compounds.

中文翻译：

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持续使用肥料使西西伯利亚森林草原土壤磷素状态发生变化

摘要

在西伯利亚西部草原的固定田间试验中，对灰色森林和草甸黑钙土的长期农业利用对磷状态的影响进行了比较评估。确定了广泛和集约化农用土壤中不同磷化合物的含量。所研究的土壤的特征在于总磷浓度较高（灰色森林土壤中为0.15–0.21％，草甸黑钙土土壤中为0.15–0.17％）。磷肥的持续使用显着提高了灰色森林土壤耕作层中这种矿质元素的高迁移形式水平，使其达到12.5-14.6 mg / kg，草甸黑钙土土壤达到22.1-26.6 mg / kg。无机磷酸盐的粒度分布分析表明，其化合物的储藏量稳步增加，并具有长期正平衡。施用量超过清除量的磷分布在前四个馏分中，在行动和后作中均可用于作物吸收。在最初肥沃的草甸黑钙土重质粘土壤土上，磷浓度的所有变化（减少和增加）均不如灰色森林土壤明显，表明其较高的缓冲能力。诊断指标值的最大相对变化是磷化合物最易移动的馏分的特征。在行动和后作中均可用于作物吸收的地方。在最初肥沃的草甸黑钙土重质粘土壤土上，磷浓度的所有变化（减少和增加）均不如灰色森林土壤明显，表明其较高的缓冲能力。诊断指标值的最大相对变化是磷化合物最易移动的馏分的特征。在行动和后作中均可用于作物吸收的地方。在最初肥沃的草甸黑钙土重质粘土壤土上，磷浓度的所有变化（减少和增加）均不如灰色森林土壤明显，表明其较高的缓冲能力。诊断指标值的最大相对变化是磷化合物最易移动的馏分的特征。