Response of high yielding varieties of arecanut to fertilizer levels in coastal Karnataka
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Date
1999
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Abstract
A field study (1985-1997) was conducted at Central Plantation Crops Research Institute, Regional Station, Vittal to determine the nutritional requirement of high yielding varieties of arecanut. Four varieites, viz. Mangala, Sumangala, Sreemangala and South Kanara Local as main plot treatments and five fertilizer levels, viz. 0:0:0; 50:20:70; 100:40:140; 150:60:210 and 200:80:280 g of N:P205:K20 per palm per year, respectively as sub plot treatments were tried in a split-plot design. Both height and girth increments between first and ninth year of experimentation were found non-significant due to fertilizer levels indicating that application of higher dose of fertilizers would have no impact on growth. Yield (dried dehusked nut) varied significantly in different years. Pooled data (1993-97) revealed that both varieties and fertilizer levels significantly influenced the number of nuts and yield. Interaction effect of varieties and fertilizer levels was also found significant. The fertilizer level of 200 g N: 80g P2O5:280 g K20 per palm per year was found to be optimum for Mangala. Application of lOOg N: 40g P205: 140g K20 per palm per year was found to be ideal for Sumangala and Sreemangala. Economic analysis indicated an appreciable increase in net income and benefit-cost ratio with increase in fertilizer dose. Maximum net income (Rs. 2,31,627/ha) and benefit-cost ratio (4.25) were obtained with a fertilizer level of 200g N: 80g P205: 280g K20 per palm per year.
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J.Plantn.Crops 1999 v-27 i-3 p-187-192