Growthand yield response of groundnut (<i>Arachis hypogaea</i> l.) to plant densities and phosphorus on an ultisol in southeastern Nigeria

Abstract

An experiment on the optimum planting density and Phosphorus requirement of a local Groundnut (Arachis hypogaea L.) cultivar, 'Graffi' was carried out at the Crop Science Research Farm of the University of Calabar, in the humid area of southeastern Nigeria, during the growing seasons of 2007 and 2008. Five Phosphorous rates 90, 20, 30, 40 and 50 kg P O /ha) were applied to five plant densities of Groundnut 2 5 (47619, 57128, 71428, 95238 and 142857 plants/ha) laid out in a RCB design in three replications. Parameters assessed were plant height, branches /plant, dry biomass yield/ha, filled pods/plant and seed yield/ha. Results showed significant (P=0.05) effect of planting density on plant height, while phosphorus rates influenced the number of filled pods/plant and seed yield/ha. Tallest plants with mean height of 53.2 cm were in plots containing 142,853 plants/ha, while the highest mean number of 15.2 filled pods/plant and correspondingly highest mean seed yield of 1078.3 kg/ha were obtained by applying 40 kg P O /ha to 95,238 plants/ha. It was 2 5 concluded that the plant density of 95,238 plants/ha with application of 40kg P 0 /ha would enhance optimum 2 5 productivity of groundnut in the humid areas of southeastern Nigeria.

Performance of salt tolerant mutant rhizobia inoculation with graded levels of nitrogen on the growth and yield attributes of groundnut (arachis hypogaea l.)

“…The maximum number of pods (39.28) and test weight (48.26 g) received the treatment T 8 -GNBJ-9M + 100% N followed by T 7 -GNBJ-9M + 75% N when compared to other treatments respectively in groundnut (Fig-3). The present findings are accordance with the results of Shiyam (2010).…”

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ARTICLE INFO ABSTRACTGroundnut (Arachis hypogaea L.) is one of the most important oleaginous plants cultivated in globally and particularly in tropical and subtropical areas (Shiyam, 2010). This crop is commonly cultivated in arid and semi-arid regions of India where it plays an important socioeconomical role.

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Influence of neutron irradiation and phosphorus on the performance of groundnut [<i>Arachis hypogaea</i> (L.)] genotypes grown on a P-deficient alfisols at Samaru, Nigeria

“…This suggested for a need of irradiation and a P application of 20 kg P 2 O 5 ha -1 for a good number of branches in the two (SAMNUT 24 and SAMNUT 26) genotypes. Shiyam (2010), in a study, reported a non-significant difference between P rates on plant height and numbers of flowers and branches. However, Gobarah et al (2006) reported an increase in vegetative growth due to increase in P rate of application.…”

Peanut (Arachis hypogaea L.) yield and its components as affected by N-fertilization and diazotroph inoculation in Toshka desert soil-South Valley-Egypt.

“…It is an important cash crop for peasants in poor tropical countries [2]. Recently, this crop has been given great attention due to its suitability for growth in the newly reclaimed sandy areas in Egypt.…”