Utilization of Chromolaena odorata as a source of nutrients in groundnut
Publication Date : 25/07/2016
The Chromolaena odorata weed poses a great threat to the fragile biodiversity of the Western Ghats, eco-tourism, forestry, watershed management and sustainable farm management, where it is competitively replacing the existing indigenous rich flora, thereby creating ecological imbalance. This weed has assumed much importance due to its alarmingly increasing intensity day by day. Field study was planned under this content at Main Research Station, Hebbal, University of Agricultural Sciences, Bengaluru. The treatments comprised of various combinations of Chromolaena’s compost with recommended dose of fertilizer (RDF), RDF+ farm yard manure (FYM), RDF alone and unfertilized control. The results revealed that combined application of compost of Chromolaena odorata (90%) + cow dung slurry (10%) + microbial consortium + rock phosphate (2.5% of P) @ 7. 5 t ha-1 along with 100% RDF was superior and recorded higher pod yield by 8.0% and higher net income of Rs 20,916 ha-1 than RDF + FYM 7.5 t ha-1 (17,549 kg ha-1) in groundnut. Further, application of compost of Chromolaena odorata (2/3) + FYM (1/3) @ 7.5 t ha-1 + RDF was the next best treatments in terms of higher pod yield and net income in groundnut, besides substantially increasing the fertility status of the soil by increasing the available soil nitrogen, phosphorus and potassium.
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