Effect of arbuscular mycorrhizal fungi Acaulospora sp. and Gigaspora sp. on the growth and development of Dai Thom 8 rice grown on saline soils in Giang Thanh district, Kien Giang province

Abstract

Arbuscular mycorrhizal fungi with rice is a mutual relationship. Rice provides organic carbon sources in the form of sugars and lipids to meet the growth and development of Arbuscular mycorrhizal fungi. In contrast, mycorrhizal fungi enhance the ability of rice to absorb nutrients, regenerate, and strengthen the soil structure. In addition, they also help plants resist invading pathogens and withstand salt stress. The study was carried out with the aim of (i) Investigation of the re-infection ability of the Acaulospora sp.-ABLTDT813 and Gigaspora sp.-ABLTDT851; (ii) Evaluation of the effects of Acaulospora sp.-ABLTDT813 and Gigaspora sp.-ABLTDT851 on the growth of rice under greenhouse conditions and yield under field cultivation conditions. The results of the study determined that the re-infection rate of Gigaspora sp.-ABLTDT851 and Acaulospora sp.-ABLTDT813 strains were 70% and 100%, respectively. Experiments have determined that the mycorrhizal fungus Acaulospora sp.-ABLTDT813 affects the growth of rice more effectively than the Gigaspora sp.-ABLTDT851 strain, and was not different from the experiment of combining these two strains in greenhouse conditions. In which, plant height and rice root length increased by 1.25 times and 1.56 times respectively compared with the control treatment. Research results in field cultivation conditions in Giang Thanh district, Kien Giang province, the treatment with the addition of the arbuscular mycorrhizal fungus Acaulospora sp.-ABLTDT813 showed that rice yield increased 1.28 times compared to the control.