Diversity of Types of Arbuscular Mycorrhizae Fungi in Acid Sulfate Soil

Background: Land with acid sulfate soil type is suboptimal land for agricultural cultivation. Identification of mycorrhizae fungi diversity in acid sulfate soil is one of the critical strategies needed to determine the quality of land and as a basis for determining land use for agriculture. Methods: The research was conducted at the Faculty of Agriculture, Tanjungpura University, Pontianak City, Indonesia. The research period from December 15th 2023, to January 15th 2024. Analysis the number of mycorrhizae spores and colonization was conducted at the plant disease laboratory. Analysis of the chemical properties of acid sulfate soil was conducted at the Soil Chemistry and Fertility Laboratory. The physical properties of acid sulfate soil were conducted at the Soil Physics and Land Conversion Laboratory. Result: Management of mycorrhizae fungi can be one strategy to improve plant growth and development in acid sulfate soil. The results of the study showed the types of mycorrhizae fungi in acid sulfate soil are Glomus sp., Scutelospora sp., Gigaspora sp. and Acaulospora sp., with the highest number of spores in the Glomus sp. type. The density of spores obtained in 50 g of acid sulfate soil ranges from 32 to 49 spores. Colonization of mycorrhizae fungi on various pioneer plants ranges from 25.00 to 95.48%, with the number of colonizations being in the Limnocharis flava type (95.48%).