Abstract

The effect of long-term usage of various fertilization systems (organic, mineral, and organic-mineral) on the agrochemical indicators of sod-podzolic heavy loamy soil and the productivity of crops of eight-field crop rotation has been studied. Fertilization systems with high saturation (manure 20 t/ha per year, NPK in equivalents of manure 20 t/ha per year, and manure 10 t/ha per year + NPK in equivalents of manure) provided a significant increase in soil humus content (from 1.97 to 2.23–2.50%), mobile phosphorus (by 120–145 mg/kg), and exchangeable potassium (by 105–163 mg/kg) as well as increase in total, mineral, and hydrolyzable nitrogen content (by 200–360, 1.3–2.3, and 53–65 mg/kg, respectively). Cattle manure contributes to a decrease in hydrolytic acidity from 2.3 to 1.5–1.8 and to an increase in the amount of exchange bases from 18.2 to 20.8–21.9 mmol/100 g of soil. NPK treatment (in equivalents of manure 20 t/ha per year) leads to an increase in the hydrolytic acidity by 1.0 and to a decrease in the total exchangeable bases by 1.1 mmol/100 g. The maximum productivity of arable land (3800 fodder units per ha) has been obtained under fertilization systems NPK equivalent to manure 20 t/ha per year and manure 10 t/ha per year + NPK in equivalents of manure.

中文翻译：

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施肥制度对乌拉圭前草肥壤土重金属肥力指标的影响。

摘要

研究了长期使用各种施肥系统（有机，矿物和有机矿物）对草坡生重壤土土壤的农业化学指标以及八田轮作的农作物产量的影响。高饱和度的施肥系统（每年粪肥20吨/公顷，每年粪便NPK相当于20吨/公顷，每年粪便10吨/公顷+ NPK相当于粪便）显着增加了土壤腐殖质含量（从1.97％到2.23–2.50％），流动磷（120–145 mg / kg）和可交换钾（105–163 mg / kg）以及总，矿物质和可水解氮含量的增加（200–200 mg / kg）分别为360、1.3-2.3和53-65 mg / kg）。牛粪将水解酸度从2.3降低到1.5-1.8，并将交换碱的量从18增加。2至20.8–21.9 mmol / 100 g土壤。NPK处理（相当于每年20 t / ha的粪肥）导致水解酸度增加1.0，而总可交换碱减少1.1 mmol / 100 g。在氮磷钾施肥系统下，相当于每年20吨/公顷的粪肥和每年10吨/公顷的粪肥+相当于粪肥的氮磷钾，已获得了最大的耕地生产率（每公顷3800饲料单位）。