Kumar C P Sunil, Garampalli Rajkumar H
J Environ Biol. 2013 Mar;34(2):159-64.
The two different agro-ecosystems were selected to study the spore density, species abundance, and diversity of arbuscular mycorrhizal fungi (AMF) in irrigated (Mandya district) and non-irrigated (Hassan district) agricultural fields in southern Karnataka region, India. A total of 22 AMF species were recorded during the study. Out of which 13 sp. were of Glomus, 4 sp. of Acaulospora, 1 sp. of Cetraspora, 1 sp. of Dentiscutata and 3 sp. of Gigaspora. The difference in species richness of AMF species in irrigated fields ranged from 5-12 sp. as compared to non-irrigated fields (5-11 sp.) and the difference may be attributed to the nutritional status of the soil. We also assumed that lower AMF colonization and abundance would be affected by water stress. Highest spore number and percent colonization of AM fungi were recorded in irrigated sites, showing 356-748 spore density and 70-92% colonization. Whereas, in non-irrigated sites, 174-341 spore density and 40-72% colonization was recorded. Different agro-climatic conditions like irrigation, soil pH, soil organic carbon, phosphorous correlated with the abundance and colonization of AM fungi.
选取了印度卡纳塔克邦南部地区灌溉农田（曼迪亚区）和非灌溉农田（哈桑区）这两种不同的农业生态系统，以研究丛枝菌根真菌（AMF）的孢子密度、物种丰度和多样性。研究期间共记录到22种AMF物种。其中，13种属于球囊霉属，4种属于无梗囊霉属，1种属于多孢囊霉属，1种属于盾巨孢囊霉属，3种属于巨孢囊霉属。与非灌溉农田（5 - 11种）相比，灌溉农田中AMF物种丰富度的差异范围为5 - 12种，这种差异可能归因于土壤的营养状况。我们还假设较低的AMF定殖率和丰度会受到水分胁迫的影响。灌溉地点记录到AM真菌的最高孢子数和定殖率百分比，孢子密度为356 - 748个，定殖率为70 - 92%。而在非灌溉地点，孢子密度为174 - 341个，定殖率为40 - 72%。不同的农业气候条件，如灌溉、土壤pH值、土壤有机碳、磷，与AM真菌的丰度和定殖率相关。
