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All Journal Journal of Degraded and Mining Lands Management
E Handayanto
IRC MEDMIND, Brawijaya University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Effects of biochar and crop residues application on chemical properties of a degraded soil of South Malang, and P uptake by maize B D Satriawan; E Handayanto
Journal of Degraded and Mining Lands Management Vol 2, No 2 (2015)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.628 KB) | DOI: 10.15243/jdmlm.2014.022.271

Abstract

Low productivity of food crops on marginal dry lands of South Malang, East Java occurs due to low levels of soil fertility in the region due to low soil organic matter content and low content of available P. The purpose of this study was to evaluate the effect of the combination of biochar and plant litter on chemical properties of a degraded soil of South Malang, and P uptake by maize. The treatments tested in this study was a combination of types of biochar (sugarcane litter biochar and maize litter biochar), and the type of fresh litter (sugarcane and maize). Biochar doses applied were 0, 20 and 40 t biochar / ha, whereas the doses of fresh litters applied were 0, 40, and 80 t litter / ha. Three maize seed of BISI 2 variety was grown in each pot (treatment) for 49 days. Nine treatments were arranged in a completely randomized design with three replications. The results showed that application of litter and biochar tended to lower pH, CEC, exchangeable Ca, and total P the soil studied. The interaction of litter and biochar did not significantly increase P availability in the soil. However, application of litter and biochar also increased P uptake by maize. The best treatment for maximum increase of P availability and uptake of P was application 80 t sugarcane fresh litter / ha and 40 t maize litter biochar / ha.
The potential of legume tree prunings as organic matters for improving phosphorus availability in an acid soil I Wahyudi; E Handayanto
Journal of Degraded and Mining Lands Management Vol 2, No 2 (2015)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.794 KB) | DOI: 10.15243/jdmlm.2014.022.259

Abstract

A study that was aimed to elucidate roles of Gliricidia sepium and Tithonia diversifolia prunings and their extracted humic and fulvic acids on improving phosphorus availability and decreasing aluminum concentration in an Ultisol was conducted in a glasshouse. Thirteen treatments consisting of two prunings, six rates of pruning application (5, 7.5, 10, 20, 40 and 80 t/ha) and one control (no added prunings) were arranged in a randomized block design with four replicates. Each mixture of prunings and soil was placed in a pot containing 8 kg of soil and maize of Srikandi cultivar was grown on it for 45 days. At harvest, soil pH, P content and aluminium concentration were measured. Results of the glasshouse experiment showed that application of Gliricidia and Tithonia prunings significantly increased soil pH, reduced Alo concentration, increased Alp content, increased P availability, and increased P taken up by maize grown for 45 days. The optimum rate of both Gliricidia and Tithonia pruning should be 40 t/ha. However, at the same rate, optimum production gained by Tithonia would be higher than that of Gliricidia.
Co-Authors B D Satriawan I Wahyudi