ผลของราอาบัสคูลาร์ไมคอร์ไรซาต่อการเติบโตและอัตราผลผลิตของผักสลัดอินทรีย์ / วรรณธิรา รณะบุตร = Effects of Arbuscular mycorrhizal fungi on growth and productivity of organic lettuce / Wantira Ranabuht
The present research aims to study the effects of different isolates of Arbuscular mycorrhizal fungi (AMF) on growth and yield of lettuce (Latuca sativa L.) for using in organic farming system. AMF spores were obtained from a lettuce commercial organic farm in Wang Nam Keaw district, Nakorn Rachasima provice. They could be identified by using morphological characteristics into 7 isolates from 4 genera which were Acaulospora sp. Gigaspora sp. Glomus etunicatum Glomus geosporum Glomus mosseae Glomus multicaule and Scutellospora sp. Fifty spores of each isolates were tested for growth on 2 varieties of lettuce, green oak and red oak, compared with uninoculated treatment (control). Mature lettuces were collected and studied for leaf number, leaf fresh and dry weight and percentage of root infection. The result showed that Scutellospora sp. and G. mosseae were the best isolates for promoting growth and yield of green oak and red oak, respectively. The treaments significantly increased leaf number, leaf fresh and dry weight compared with control treatment. Beside, these two isolates also showed highest percentage of root infection on lettuces. Then, the variations of spore concentration at 25, 50, 100, and 200 spores/plant of each isolate were tested for growth of green oak and red oak. The result showed that at the concentration of 200 spores/plant, Scutellospora sp. and G. mosseae were the best concentrations for promoting growth and yield and also gave the highest percentage of root infection on green oak and red oak, respectively. However, growth and yield of 50 and 100 spores/plant inoculated with G. mosseae in red oak didn’t have any significant differences from 200 spores/plant. In conclusion, the AMF application into lettuce cultivation can stimulate growth and yield of the plants.
