Abstract
Most developing areal for peanut crop (Arachis hoypogeae) is upland, that is dominated by parent soil and has acidcharacteristis. Main constraints for this soil are pH and low soil productivity. Dolomite plus is a dolomite ameliorant,with phosphate nutrient. The dolomite plus beside as the ameliorant and a source of magnecium and calciumnutrients, also as a source of phosphate nutrient. The objective of the research was to study effectivity of dolomiteplus on peanut growth in Inceptisols soil. This research was conducted in the greenhouse using a randomizecompletely designed with 8 treatments and 5 replications. The treatments were control, NPK, and combinations ofNPK with six dolomite plus levels. Relative Agronomic Effectiveness (RAE) analyses was used determine to theeffectivity of dolomite plus. The result showed that application of dolomite plus 1,600 kg ha-1 with NPK fertilizerincreased dry weight of grain yield untill 27% (11.53 to 14.65 g plant-1) compared to NPK fertilizer application alone,that was showed by RAE > 100% or among 171-251%. Application of dolomite plus with NPK increased soil pH, soilavailable P (Bray 1), Ca and Mg exchangeable, and CEC as 1.9 unit; 6.2 mg kg-1; 15.87 cmol(+) kg-1; 14.27 cmol(+)kg-1; and 17.29 cmol(+) kg-1 respectively. Maximum rate of dolomite plus was 2,500 kg ha-1 with the yield was 14.2 gplant-1 grain dry weight. The rate of dolomite plus that was higher than 2,500 kg ha-1 could decrease the yield[How to Cite: Sutriadi MT and D Setyorini. 2012. Response of Peanut due to Application of Dolomite Plus. J Trop Soils 17: 143-150. Doi: 10.5400/jts.2012.17.2.143] [Permalink/DOI: www.dx.doi.org/10.5400/jts.2012.17.2.143]
Highlights
Peanut (Arachis hypogeae) is one of main food crop, beside maize and rice
The heavy metal contents Pb, Cd, As, and Hg were very low i.e. 2.6 mg kg-1, 0.7 mg kg-1, and not measureable respectively. This result shows that dolomite plus that was qualified as dolomite formula based on SNI 02-2804-1992
Application of dolomite plus with rates between 200 and 3,200 kg ha-1 combined with NPK fertilizer effectively increased dry weigh of peanut seed. It was shown by relative agronomiy effectiveness (RAE) value which was more than 100% i.e. 144216% (Table 6)
Summary
Peanut (Arachis hypogeae) is one of main food crop, beside maize and rice. The data shows about 60% of peanut in Indonesia is used as a raw material for food industry and about 57% of them for animal feed (Anonymous 2006). A largely agricultural area of peanut is at dryland (79%). From this dry land area of peanut, 57% of them are growed at the soil that is classified as old weathering soil such as Ultsols, Oxisols, and Inceptisols. These soils generally have charactiristics of acid to very acid and poor of nutrients. The soil acidity and fertility can become an important problem to increase the peanut productivity. High soil acidity can be considered as an important factor, which adversely affect crop production. The use of lime materials to reduce the soil acidity is an important soil management practice (Wijewardena 2001)
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