Providing of leached chernozem with mobile nitrogen and phosphorus under long-term influence of crop rotation and agricultural technologies
Year: 2024
Type: article
Abstract: Research aimed to study the influence of long-term exposure to forecrop, soil cultivation methods and nitrogen-phosphorus fertilizers on the content of available nitrogen and phosphorus in leached chernozem. The work was carried out in the Altai Territory in 2019-2023. The experimental design included the following options: forecrop (factor A) – crops in crop rotation in pairs (against the background without tillage – rapeseed for oilseeds) – wheat – oats – wheat – peas – wheat, permanent wheat; tillage (factor B) – no tillage, shallow (14-16 cm), deep (25-27 cm) flat-cut; fertilizers (factor C) – without fertilizers, N 45.8 P 25 . The soil was leached medium loamy chernozem, pH sol – 6.2 units, humus content – 3.5-4.0%, mobile forms of phosphorus and potassium (according to Chirikov) – 150-230 and 140-200 mg/kg, respectively. By seedlings in the 0-40 cm layer, the content of easily hydrolysed nitrogen under permanent wheat (98 mg/kg) was greater than under wheat after oats and peas (76-86 mg/kg), as well as under steamed wheat, oats and peas (70-71 mg/kg). With flat-cut tillage, in comparison with direct sowing, it increased without fertilizers from 68 to 77-80 mg/kg and decreased against the background of N 45.8 P 25 from 88 to 78-81 mg/kg. In a meter layer of soil, with the systematic application of N 45.8 P 25 , in addition to the unfertilized background, 48 kg/ha (67.6%) of nitrate nitrogen accumulated. After fallow and peas, higher reserves were formed (132 and 109 kg/ha) than after grains (74-92 kg/ha), with minor differences between treatment options (92-99 kg/ha). In the 0-40 cm layer, with the systematic application of N 45.8 P 25 , in addition to the unfertilized background, 9 mg/kg (4.5%) of mobile phosphorus accumulated. The highest content in the experiment was observed after peas (215 mg/kg), fallow (210 kg/ha), oats (209 mg/kg) and permanent wheat (208 mg/kg).
Language: English
Subfield: Soil Science
Domain: Life Sciences
SDGs: Zero hunger, Life on land
Open Access status: hybrid
OpenAlex ID: W7203741986