Response Of High Yielding Coconut Genotypes To Fertiliser Levels Under Rainfed Conditions
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Date
1979
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A field experiment was conducted to determine the NPK fertiliser requirement of three coconut genotypes viz. West Coast Tall progenies of high yielders, Dwarf x Tall and Tall x Dwarf and evaluate their performance under three levels of fertiliser application. The genotypes did not differ in their response to no fertiliser treatement. When NPK fertiliser was applied, the D x T hybrid outyielded the Tall and the reciprocal hybrid TxD. Contrary to expectation, the response of the Tall was found linear, at the higher level of fertilisers. The response to the higher level of fertilisers by the hybrids was negligible. The D x T yielded higher, showed higher efficiency in utilising applied nutrients and attained earlier bearing, than the other two genotypes. Higher level of fertiliser application reduced the prebearing age. Under rainfed condition, significant response to fertiliser application by DxT and TxD hybrids was recorded upto 500 g N+500 g P2O5 + 1000 g K2O while the high yielding West Coast Tall responded positively even at 1000 g N+1000 g P2O5+2000 g K2O/palm/year.
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In: Proceedings, PLACROSYM I, RRII, Kottayam, 20-23 Mar. 1978. Edited by E. V. Nelliat and others 1979 p-87-100