Abstract

The changes in the physical properties and carbon stocks of dark-humus podbels (Luvic Albic Mollic Planosols (Epiloamic, Endoclayic, Aric)) during long-term agricultural use and postagrogenic evolution were studied. Soil samples were taken in three trials: control (without fertilizers), high rates of mineral fertilizers, and mineral fertilizers + manure + lime (Chaika Experimental Field Station of the Federal Research Center for Agrobiotechnology of the Far East, Primorsky region) and in the abandoned fields (15, 20, and 35 years ago). It was shown that the long-term application of mineral fertilizers increases the soil bulk density. Application of organic and mineral fertilizers and lime had a positive effect on the bulk density and structural characteristics of soils. The abandonment of agricultural fields and the cessation of mechanical tillage resulted in the restoration of the natural soil structure. The content of agronomically valuable aggregates increased, while their mean weighted diameter decreased in the upper horizon of studied fallow soils. The carbon content and stock in the upper soil layer decreased in the first years of the conversion of arable fields to unmanaged fallow. The carbon stock in the upper 50-cm layer increased with time.

中文翻译：

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黑腐殖质 Podbels 物理性质和碳储量的农化和后农化变化

摘要

研究了长期农业使用和后农业进化过程中暗腐殖质豆荚（Luvic Albic Mollic Planosols（Epiloamic、Endoclayic、Aric））的物理性质和碳储量的变化。在三个试验中采集土壤样品：对照（不施肥）、高比例矿物肥料和矿物肥料 + 粪肥 + 石灰（远东联邦农业生物技术研究中心的柴卡试验田间站，滨海边疆区）和废弃的田地（15、20 和 35 年前）。结果表明，长期施用矿物肥料会增加土壤容重。有机肥、矿物肥和石灰的施用对土壤的容重和结构特征有积极影响。农田的废弃和机械耕作的停止导致自然土壤结构的恢复。在所研究的休耕土壤的上层，具有农艺价值的团聚体的含量增加，而它们的平均加权直径减小。在耕地转为非管理休耕地的头几年，上层土壤的碳含量和储量下降。上部 50 厘米层中的碳储量随时间增加。