Abstracts |
A survey of mango nurseries and orchards of different age groups (0-5, 5-10 and >10 years old) was carried out in six districts of Uttar Pradesh, India, to record the mycorrhizal status of some commonly grown mango varieties in the state. The investigated districts included Barabanki, Bulandshahar, Faizabad, Malihabad, Meerut and Varanasi, and their corresponding commonly grown mango varieties were Dasheri, Chausa, Amrapali, Dasheri, Ratual and Langra. Tabulated data showed that the mycorrhizal colonization of mango roots was greater in nurseries (22.5-31.7%) than in orchards (11.6-27.6%). Among the nurseries and orchards of different varieties, the highest mean colonization values (31.7 and 26.0%) were recorded on Amrapali in Faizabad and on Chausa in Bulandshahar, respectively, while the lowest values (22.5 and 11.6%) were recorded on Dasheri in Barabanki and on Amrapali in Faizabad district, respectively. The colonization of young (0-5 years) orchards varied from 20.9-26.0%, whereas it was 11.6-13.2% in old (>10 years) orchards. Among the nurseries of different varieties the highest number of spores (356.0) were recorded on Ratual variety in Meerut and lowest (64.0) on Dasheri in Barabanki. Among orchards of different varieties, the highest mean spore density (314.1/100 g soil) was recorded around Chausa in Bulandshahar and lowest (64.0/100 g soil) around Dasheri in Barabanki district. The spore population around young orchards was 190.0-314.4 and 64.0-90.9 in old orchards.. |