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- Title
SULPHUR UPTAKE, SULPHUR DERIVED FROM FERTILIZER (SDFF), S UTILIZATION AND YIELD OF 'ROBUSTA' BANANA (MUSA x PARADISIACA) AS INFLUENCED BY PLACEMENT AND SPLIT APPLICATION OF <sup>35</sup>S LABELLED SUPERPHOSPHATE UNDER HIGH DENSITY PLANTING.
- Authors
KALAIVANAN, D.; SUDHIR, K.; VENUGOPALAN, R.
- Abstract
Sulphur uptake, sulphur derived from fertilizer (Sdff), S utilization, dry matter production and bunch yield of 'Robusta' banana (Musa x paradisiaca) under high density planting were studied on a sandy clay loam (Udic Paleustalf) soil at ICAR-Indian Institute of Horticultural Research, Bangalore using 35S labelled superphosphate applied in different split at early vegetative (I split), late vegetative (II split) and bud differentiation (III split)) stages and placement (15-35, 35-55 and 55-75 cm band width) from pseudostem of the plant. From the results, it is noteworthy that it was the first split application from which Sdff of 8.22% was observed compared to 3.31 and 0.94% from II and III split applications, respectively as observed from the isotope found in leaves from 20 to 80 days after application. However, in respect of total fertilizer utilized by plant, both I and II split applications contributed 39-40% while the III split application supplied 20% of the fertilizer sulphur to the plant. Higher dry matter production, fruit weight and bunch yield of 'Robusta' banana was recorded with I and II split application. Among the placements 15-35 and 35-55 cm placements showed an edge with the highest fruit weight, bunch weight and dry matter production over the farthest placement (55-75 cm). The experiments revealed that inter-plant competition of roots for nutrients was practically negligible. Leaf and fruit were the largest sinks (35.2 and 31.9%, respectively) for fertilizer sulphur while pseudo stem appropriated 15.8%. Application of recommended sulphur in 2 splits as circular bands at 5cm depth, between 15 and 35cm in the first and between 35 and 55cm distance from the base of the plant in the second split was optimal to attain high fruit and bunch yield in Robusta banana under high density planting. Application of fertilizer at the farthest distance between 55 and 75 cm distances was distinctly inferior showing that there is little scope of application of fertilizers between the rows under the high-density planting of banana.
- Subjects
PLANTAIN banana; BANANAS; SULFUR fertilizers; SULFUR; FERTILIZERS; FERTILIZER application
- Publication
Applied Ecology & Environmental Research, 2023, Vol 21, Issue 5, p4489
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/2105_44894504