Keywords:
- humus state
- group and fractional composition of humus
- humic acid
- fulvic acid
- humic substance
- meadow-alluvial
- swamp-meadow
- labile humus
Abstract
This article presents the results of research on the group and fractional composition, labile (mobile) humus substances, and humus status of hydromorphic soils of the Tashkent oasis. In this case, it was determined that the group and fractional composition of soil humus depends on the distribution of the amount of humus on the genetic layers of the soil, the soil-forming mother rock and soil types and types of the geomorphological regions, and the 2nd and 3rd fractions of humic and fulvic acids dominated the humic substance, and the soils belonged to the fulvate-humic, humic-fulvate and fulvate types. The amount of labile (mobile) humic and fulvic acids in the soils was 2.04-8.49% and 3.30-11.76% in the irrigated marsh-meadow soils, and higher indicators were observed in the lower layers. Their amount was 2.25-5.63% and 2.77-14.19% in former irrigated meadow alluvial soils. Based on data on the humus status indicators of the republic's soils, they are classified into 3 groups according to their ecological status: C:N ratio, 1a aggressive fulvic acids, and the amount of water-soluble humus.
References
Shadiyeva N.I. Vertikal zonallikda tarqalgan tuproqlarning gumusli holati, gumus moddalarining shakllanish mexanizimini tadqiq etish (Turkiston tog‘ tizmasi misolida). Dissertatsiya, b.f.d. – Toshkent, 2018, – 207-b.
Методы агрохимических, агрофизических и микробиологических исследований в поливных хлопковых районах// Союз НИХИ, – Ташкент 1963, – с. – 270-274.
Методы агрохимических анализов почв и растений Средней Азии. ЎзПИТИ, 1977. – С. – 214
Аринушкина Е.В. Руководства по химичекскому анализу почв / – М.: МГУ, 1970 – С. – 487
Toshqo‘ziyev M.M. Tuproqda umumiy gumus va xarakatchan gumus moddalari miqdoridan uning unumdorligi ko‘rsatgichi sifatida foydalanishga doir uslubiy ko‘rsatmalar. – Toshkent, 2006. – 47 b.
Shadiyeva N.I. Tog‘ yonbag‘ri eroziyalangan lalmi va sug‘oriladigan tuproqlarining gumusli holati, xossalari, unumdorligi (Shimoliy Turkiston va G‘arbiy Chotqol tuproqlari misolida). Dissertatsiya b.f.n. – Toshkent 2009, – 121-b.
Ташкузиев М.М., Шадиева Н.И. Система показателей гумусного состояния почв центральноазиатского региона, использование ее критериев в решении вопросов гумуссобразования и плодородии почв / «Казахский НИИ почвоведения и агрохимии им. У.У. Успанова» Ж: Почвоведение и агрохимия, № 3, – Алматы, 2020. – С. – 15-24.
Ермаков В.В., Тютиков С.Ф., Сафанов В.А. Биогеохимическая индикация микроэлементозов / Отв.ред Т.И. Моисенко. – Москва, 2018. – 386.
