Nutrient uptake efficiency of cassava (Manihot esculenta Crantz) as influenced by vesicular arbuscular mycorrhizal (Vam) association and rock phosphate application
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Date
1991
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Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani
Abstract
An experiment was conducted under pot culture in Fine Loamy Mixed Isohyperthermic Khaplic Haplustafs soil of Vellayani series at College of Agriculture, Vellayani, Trivandrum ; during Sep. to Dec. 1989. Sixteen treatment combinations with four levels of Rock phosphate (0, 50%, 75% and 100% recommended dose), VAM inoculation and control, and soil sterilisation and non – sterilisation was applied to cassava (cultvar M – 4). Biometric observation and chemical analysis of plant parts were undertaken for three mouths of thirty days interval.
The results indicated no significant variation in soil nutrient status due to the effect of applied treatments during the three months. Dry matter production of cassava was increased by inoculation of VAM and phosphate nutrition. Application of 37.5 kg P2O5/ha in non – sterilised soil along with VAM inoculation was found to be the best treatment combination.
Inoculation of VAM fungi resulted in better uptake of major, secondary & micro nutrients during the active vegetative phase of the crop. Effect of soil sterilisation was not conclusive. Phosphate nutrition of the crop resulted in better uptake of all major nutrients. Field experiments are suggested to establish the present findings and to relate the effects of treatments with tuber yield.
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170254