Necessity for quantified measurement of soil sodicity and selection of suitable gypsum amendment for proper reclamation of sodic soils  

作　　者：Arup Kumar MANDAL 

机构地区：[1]Indian Council of Agricultural Research-Central Soil Salinity Research Institute,Karnal 132001,lndia

出　　处：《Pedosphere》2023年第1期231-235,共5页土壤圈（英文版）

摘　　要：Dear Editor,Soil sodicity is the primary limiting factor in sustainable crop production in arid and semiarid regions,where the water scarcity,low rainfall,and poor-quality(salty)groundwater are common occurrence(Datta et al.,2019;Hosain,2019;Minhas et al.,2019;Kumar and Sharma,2020).Globally,five categories of salt-affected soils have been identified,based on the nature and composition of salts(Szabolcs and Varallyay,1971;Kovda,1973;Szabolcs,1989).These soils are saline and dominated by natural salts,alkali enriched by salts capable of alkaline hydrolysis(Na2CO3 and NaHCO3),gypsiferous with excess gypsum salts,calcareous with higher content of CaCO3,acid sulfate with Fe2(SO4)3 and Al2(SO4)3 salts,and others including strongly degraded subsoil and potentially saline soils in irrigated regions.These soils were known as Solonchak,Solonetz,and Solod in eastern Europe.The alkali soils of Europe and erstwhile United Soviet Socialist Republic showed A horizon and a natric(sodic)B horizon.

关 键 词：soil SOILS ALKALI 

分 类 号：S15[农业科学—土壤学]