Changes in inorganic phosphorus fractions in weathered soils under long-term intensive cultivation and irrigation

环境科学 土壤水分 耕地 灌溉 农学 肥料 营养物 环境化学 植被(病理学) 土壤科学 化学 生态学 生物 农业 有机化学 病理 医学
作者
Marcel T. P. Job,Joesio Leandro Souza,Jakeline R. Oliveira,José Ferreira Lustosa Filho,Teógenes Senna de Oliveira
出处
期刊:Archives of Agronomy and Soil Science [Informa]
卷期号:69 (8): 1177-1192 被引量:1
标识
DOI:10.1080/03650340.2022.2070160
摘要

Conventional intensive cultivation tends to modify the interactions of phosphorus in soil, favoring inorganic forms transformations. The aim of the study was to evaluate the status of inorganic phosphorus and correlate with the chemical, physical and mineralogical soil properties in areas under natural vegetation and different cultivation periods: 1, 17, 22, 28, 32 and 43 years. Soil P was extracted using Chang and Jackson method (Al-P, Fe-P, Ca-P and Residual-P). The micro-chemical map of P concentrations within the representative aggregates was determined by electron probe. Results showed that biofertilizers application in the area under intensive cultivation for 32 years of use significantly increased all soil P fractions (4.249 mg kg−1 in upper soil layer). There was a slight increase in the P at the edges of the aggregates in the first year (0.23%), but at 43 years, there was an increase in contents within the aggregates (0.32%). The intensive cultivation promoted the increase of P content in soil fractions in the arable layer of the soil over time. However, the decline in inorganic P contents after a few years of cultivation suggests that the soils of the studied areas tend to exceed their maximum adsorption capacities in the future.
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