Effect of vam fungi and applied phosphorus through stcr precision model on growth, yield and nutrient dynamics in maize in an acid alfisoil
2012
Suri, V.K. | Choudhary, Anil K. | Chander, Girish
The inoculation of three VAM cultures viz. local culture (Glomus mosseae), VAM culture from IARI, New Delhi (Glomus mosseae) and a culture from The Energy Research Institute (TERI), New Delhi (Glomus intraradices) alone or with increasing applied phosphorus levels from 25 to 75% of recommended P₂O₅ based on soil test crop response (STCR) precision model improved the plant height, shoot and root dry matter accumulation, root length and root weight density as well as yield attributes of rainfed maize in an acid alfisol of NW Himalayas. It was revealed that sole application of any of 3 VAM fungi did not have pronounced effect on phenological stages though combined application of VAM cultures with increasing P levels from 25 to 75% of recommended P₂O₅ reduced the days to various phenological stages. It was reported that sole application of these 3 VAM cultures improved the maize grain yield by 17.10 to 25.36% over control. Increase in P levels from 25 to 75% of recommended P₂O₅ besides VAM inoculation resulted in consistent and significant improvement in grain, stover and biological yield of maize. 75% of recommended P₂O₅ alongwith VAM cultures achieved the goal of targeted yield (40 q ha⁻¹) of maize, thus, saving the applied P to the tune of about 25% without impairing the soil fertility in the present study.
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