Influence of Biofertilizers on Macronutrient uptake by the Mulberry Plant and its Impact on Silkworm Bioassay


1 University of Agricultural Sciences and Technology of Kashmir, P. Box 674, G.P.O., Srinagar,

2 Central Sericultural Research and Trainig Institute Mysore, Karnataka,


The co-inoculation of mulberry with phosphate solubilizing micro-organisms, nitrogen fixing bacteria and arbuscular mycorrhiza has influenced its macronutrient uptake through leaf. The data revealed that maximum nitrogen (484.12 kg /ha) , phosphorus (59.83 kg /ha) and potassium (244.61 kg/ha) uptake through leaf has taken place due to co-inoculation treatments as compared to the un inoculated treatments irrespective of different levels and sources of fertilizer. Significantly higher effective rate of rearing (ERR, 95.33%), single cocoon weight (2.06 g) and single shell weight (0.44 g) were recorded by feeding silkworm with the leaves harvested from the treatment T8 receiving 175 kg nitrogen and 70 kg phosphorus/ha/yr with rock phosphate as a source of phosphorus and co-inoculated with beneficial micro-organisms. Maximum filament length of 936.33 meter per cocoon and reel ability of (86%) was also recorded in the treatment T8.
Baqual, M. F., Das, P.K., Katiyar, R. S. (2005) Effect of arbuscular mycorrh-izal fungi and other microbial inoculants on chlorophyll content of mulberry (Morus spp.). Mycorrhiza News. 17: 12-14.
Chaluvachari (1995) Leaf quality evaluation of few selected mulberry varieties. PhD Dissertation, Bangalore University.  220 p.
Chandrashekar, D.S., Shekar Shetty, S. and Datta, R.K (1996) Effect of inoculation with Acaulospora laevis, Bacillus megatherium var. phosphate-cum and Azospirrillum brasillense using two sources of phosphorus on the growth and leaf yield of mulb-erry. Sericologia. 36(2): 283-287.
Das, P.K., Choudhury, P.C. Gosh, A., Katiyar, R. S., Mathur, V.B., Madhava Rao, A.R and Mazumder, M.K (1994) Studies on the effect of bacterial biofertilizer in irrigated mulberry (Morus alba). Ind. J. Seric. 33(2): 170-173.
Datta, R.K. (1992) Guidelines for bivoltine rearing. Central Silk Board, Bangalore, India.
Katiyar, R.S., Das, P.K and Choudhury, P.C. (1998) VA-mycorrhizal inocula-tion of established mulberry garden through maize (Zea maize) intercr-opping. An effective technique. Abs: National Conference on Moriculture: Physiological, Biochemical and Mol-ecular aspects of stress tolerance in mulberry (Trichy), pp: 54.
 Kasiviswanathan, K., Krisnaswami, S. and Venkataramu, C. V. (1977) Studies of varietal cum spacing and nitrogen fertilisation on the leaf yield of mulberry under irrigated conditions in Karnataka state, Indian J. seric. 16: 10-18.
Krishnaswamy, S. (1978) New Techn-ology of Silkworm rearing. CSR and TI, Mysore (India). Bulletin 2: 1-23.
Kundaswamy, D., Radha, N. V and Oblisami, G. (1986) Response of different mulberry varieties to the inoculation of VA-mycorrhizal fungi. Indian. J. Seric. 25(1): 36-39.
Pain, A.K. (1964) Effect of NPK fertilizers and the recombination on the yield and nutritive value of mulberry. Indian J. Seric. 4: 1 - 8.
Rangarajan, M. and Santhanakrishnan, P (1995) Plant growth promoting rhizobacteria and biofertilizers increase the fresh leaf yield and nutrient content in Morus alba. pp 189-195. In: Adholeya A,; Singh, S (Eds.). Mycorrhizae: biofertilizers for the future. Proceedings of the Third National Conference on Mycorrhiza, New Delhi; India: 13-15 March 1995.
New Delhi. pp.548 Ravikumar, C. (1988) Western ghats as a bivoltine region-prospects, challen-ge and strategies for its development. Indian Silk. 26: 39-54.
Umakanth, C.G. and Bagyaraj, D.J. (1998) Response of mulberry saplings to inoculation with VA Mycorrhizal Fungi and Azotobacter. Sericologia. 38: 669- 675.