Abstract
Ushbu maqolada sug‘oriladigan alluvial-proluvial jinslar ustida shakllangan kolmatajlangan tuproqlarda kimyoviy elementlarning fazoviy taqsimlanishi, migratsiyasi va biogeokimyoviy barqarorligiga ion radiusining ta’siri ilmiy jihatdan tahlil qilinadi. Ion radiusi, uning gidratlanish darajasi va sorbsion-komplekslar bilan o‘zaro ta’siri elementlarning yuvilish, cho‘kish, akkumulyatsiya va biogeokimyoviy barerlar orqali qayta taqsimlanish jarayonlarini belgilovchi asosiy omil sifatida ko‘rib chiqiladi. Maqolada kichik, o‘rtacha va katta radiusli kationlar hamda yirik radiusli anionlarning irrigatsion landshaftlardagi geokimyoviy xatti-harakatlari tizimli ravishda bayon etilgan. “Ion radiusi - migratsiya” modeli asosida kolmatajlangan tuproqlarda elementlarning harakatchanligi, sorbsion barqarorligi va o‘simliklar tomonidan o‘zlashtirilish mexanizmlari yoritilgan.
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