Peanut response to lime and molybdenum application in low pH soils

Abstract

SUMMARYLiming acid soils is considered to assure the availability of Mo in crops. Additionally, in peanuts (Arachis hypogaea L.) the positive response to liming is associated to a better supply of Ca +2 , Mo for the nitrogenase-complex activity, and other non-nitrogen fixing activities of the crop. This study was thus undertaken to assess the effect of lime, Mo, and the lime-Mo interaction on peanut crop, on an acid Ultisol at the Mococa Experimental Station, Instituto Agronômico, São Paulo State, Brazil, from 1987 to 1990. A randomized complete block design with four replications, in a 4 x 4 factorial arrangement, was used in the study. The factors included four lime rates (0, 2, 4, and 6 t ha -1 ) broadcast and incorporated into the soil, and Mo (0, 100, 200, and 300 g ha -1 ) as (NH 4 ) 2 MoO 4 applied as seed dressing. Lime was applied once at the beginning of the study while Mo was applied at every planting. Peanut seed cv 'tatu' was used. Significant increase in peanut kernel yield with liming was only evident in the absence of Mo, whereas the peanut response to Mo was observed in two out of the three harvests. A higher yield response (28 % increase) was found when Mo was applied without liming. Soil molybdenum availability, as indicated by plant leaf analysis, increased significantly when lime was applied. Molybdenum fertilization led to higher leaf N content, which in turn increased peanut yield in treatments with smaller lime doses.

Molybdenum status and critical limit in the soil for green gram (Vigna radiata) growing in Madurai and Sivagangai districts of Tamil Nadu, India

“…In the present study, we observed a marked increase in seed yield of green gram, about 33.2% at 0.075 mg kg À1 level of Mo. A similar increase (28%) was also observed by Quaggio et al (2004) in peanut yield at the rate of 0.186 kg ha À1 Mo through soil application. Bhattacharya et al (2004) reported that adequate NPK fertilization increased green gram and black gram [Vigna mungo (L.) Hepper] yields by 13 and 38%, respectively, over the control but further inclusion of B and Mo improved yield by 38% in green gram and 50% in black gram over the control in red and lateritic soils.…”

Effect of Applied Lime and Boron on the Availability of Nutrients in an Acid Soil

“…Both negative and positive effects of liming on the availability of nutrients in acid soils and subsequent uptake by crops have been reported (Quaggio et al, 2004;Kovacevic et al, 2006). There is limited information on the transformation of added B in lime-amended acid soils.…”

Calagem em latossolo amarelo distrófico da amazônia e sua influência em atributos químicos do solo e na produtividade de culturas anuais

“…nesse sentido, a determinação da necessidade de calagem requer a definição de doses adequadas de calcário para os diversos tipos de solo, por meio de estudos envolvendo a aplicação de níveis crescentes, em intervalos de tempo adequados, para que a resposta das culturas represente ganhos de produtividade (nolla & anghinoni, 2004). os benefícios da calagem na neutralização da acidez do solo têm sido amplamente relatados na literatura para as condições das diversas regiões do Brasil, constatando-se efeitos positivos na melhoria dos atributos químicos do solo e no rendimento de culturas (Camargo et al, 1997;Quaggio et al, 2004;Caires et al, 2004). ensaios com cultivo contínuo em argissolos na amazônia peruana mostram que após os primeiros anos de cultivo houve decréscimos no pH e nos teores de Ca e mg e aumento da saturação por al (sánchez et al, 1982).…”