Effects of Lime and Rates of Compound Chemical Fertilizer on Promising Large Seed Peanut Lines

Abstract

The objective of this study was to investigate the response of large seed promising lines of peanut to the rates of liming and compound chemical fertilizer. Three replications of 2x3x4 Factorial in Randomized Complete Block was designed in combination with 2 promising lines namely KKFC 4014-2 and KKFC 4008-5, three liming levels at the rate of 0, 100 and 200 kg N-P2 O5-K2 O / rai and four rates of compound chemical fertilizer namely 0, 1.5-4.5-3, 3-9-6 and 6-8-12 kg N-P2 O5-k2O/ rai. The experiment were conducted at Ban Wang Tho, Muang district, Kaen province in rainy season 2002 and at Huay Luang, Kud Chub district, Udon Thani province in dry season 2003. The results were found that pod dry weight and seed weight of KKFC 4008-5 was not significantly different. Pod dry weights of KKFC 4014-2 were 210 and 444 kg/ rai, seed weights were 123 and 297 kg/ rai at Ban Wang Tho and at Huay Luang respectively, whereas pod dry weights of KKFC 4008-5 were 203 and 430 kg / rai, seed weights were 118 and 285 kg/ rai respectively. The effect of liming showed significantly different in pod dry weight and seed weight with no liming. The rate of liming at 100 kg produced the highest pod dry weights of 237 and 465 kg/ rai at Ban Wang Tho and at Huay Luang respectively. While seed weights were 146 and 312 kg/ rai respectively. The increase of compound chemical fertilizer rate resulted in increasing of pod dry weight, seed weight and 100 seed weight which were significantly different in respect to no fertilizer application. The interaction of line x liming rate, line x chemical fertilizer rate, liming rate x chemical fertilizer rate, and line x liming rate x chemical fertilizer rate were not found in pod dry weight and seed weight. The marginal rate return for rate of liming and of compound chemical fertilizer revealed that liming at 100 kg/ rai yielding 317 and 115% return comparing with no liming at Ban Wang Tho and at Huay Luang respectively. The rate of compound chemical fertilizer at 3-9-6 kg N-P2 O5-K2 O/ rai was 69 % return comparison to no fertilizer application at Huay Luang. The yield of both promising lines, KKFC 4014-2 and KKFC 4008-5 were not significantly different, while higher economic return by marginal analysis were obtained in the rate liming at 100 kg/ rai.