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Matrix approach to the molecular properties study of the Kuban soils on the rice agrocenosisтезисы доклада
- Авторы: Zubkova Tatiana A., Recio Espejo Jose Manuel, Gutorova Oksana A., Sheudzhen Askhad Kh
- Сборник: 8th International Symposium on Interactions of Soil Minerals with Organic Components and Microorganisms. International Congress of the Division 2.5 of the International Union of Soil Sciences (IUSS). Abstract Book
- Тезисы
- Год издания: 2019
- Место издания: soil science society Seville
- Первая страница: 78
- Последняя страница: 79
- Аннотация: A matrix approach is proposed in the study of the molecular properties in the soil. The soil is considered as a matrix system in which interactions are carried out not over the entire surface, but on active centers, contacts. Contact interactions form structural bonds in the soil. The number and strength of the contacts determine the degree of interparticle contact in the soil and the physical properties of the aggregates. The matrix approach is to determine the surface properties of the total mineral mass in the soil. The soil mineral matrix (SMM) is a surface layer of soil particles (after heat treatment at 450 °C). Its functioning consists in the organization of ions, molecules and particles in a certain order around itself. It allocated the active elements - the centers which occupy 0.1-15% of the surface. The matrix is characterized by the number and strength of active centers. The purpose of the present work is the study of the mineral matrix of rice soils of the Kuban and the evaluation of its transformation. Objects of study: meadow-chernozem and meadow-marsh soils of Kuban rice agrocenoses. Research methods: The spectrum of acid centers is determined by the method of thermoprogrammed ammonia desorption with mass spectrometric analysis using a USGA-101 instrument (“UNISIT” Russia), and a thermogravimetric soil analysis using an SDT-Q600 derivatograph (TA instrument). Results and conclusion. The acidic properties of the mineral matrix of meadow chernozem and meadow bog soils have total adsorption capacity in the range of 32-61 µmol NH3/g. The lowest acidity of the SMM was noted in the conditions of permanent rice cultivation for 80 years (32-33 μmol NH3 /g). The total acidity of the mineral matrix in heavy loamy and clay meadow-bog soils is 51-53 μmol NH3/g, in medium-loam meadow-chernozem soils - 34-45 μmol NH3/g. In rice meadow-chernozem soils with a less acidic matrix the content of Fe3+ increases and the amount of Fe2+ decreases. An inverse regularity has been found in meadow-bog soils of depressions. The proportional relationship of the humus content with the acidic properties of SMM was established. However, the high yield of rice did not correlate with humus content and was in inverse connection with the acidity of the mineral matrix.
- Добавил в систему: Зубкова Татьяна Александровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Все тезисы | abstractbook_JUNE_19.pdf | 2,0 МБ | 30 июня 2019 [Zubkova55tatiana] |
| 2. | сертификат участника | Sertificate.jpg | 963,2 КБ | 30 июня 2019 [Zubkova55tatiana] | |
| 3. | Программа | total_program-june_19.pdf | 1017,8 КБ | 30 июня 2019 [Zubkova55tatiana] |