Effect of Biochar on Phosphorus Availability and Fixation in Some Rubber Growing Soils of Sri Lanka

Simple item page
dc.contributor.authorNandasena, M.A.G.H.
dc.contributor.authorHerath, H.M.S.K.
dc.contributor.authorDharmakeerthi, R.S.
dc.date.accessioned2022-03-21T08:19:20Z
dc.date.available2022-03-21T08:19:20Z
dc.date.issued2013
dc.description.abstractIn most rubber growing soils in Sri Lanka, Phosphorus (P) availability is very low and added P fertilizer becomes unavailable to the rubber plant due to strong fixation into Fe and Al oxide minerals prevalent in these soils (Dissanayake et al., 1994). Biochar (BC) may significantly improve soil fertility in acid and highly weathered soils (Lehmann and Rondon, 2006). With respect to soil chemical fertility, Dharmakeerthi et al. (2012) observed a significantly high P uptake in some BC amended rubber growing soils. BC have high P concentration than in other organic materials (Brown 2009). However, no experiment has been so conducted so far on dynamics of soil P (availability and fixation) in BC amended rubber soils, both in Sri Lanka and other rubber growing countries. Therefore, objectives of the present study were: (i) to study the changes in P availability with time in three contrasting soil types in rubber growing areas when they were amended with rubber wood biochar (RWBC), and (b) to determine the effect of RWBC on P fixation in those soils. Methodology Two factorial experiments with two factors; three soil types and three BC rates were conducted under laboratory conditions at Rubber Research Institute of Sri Lanka. . Biochar was produced from rubber wood (RW) at 350°C and added in to the three soils: Reddish Brown Latasolic soil from Parambe (PR), Reddish Brown Earth soil from Thanamalwila (TW), and Red Yellow Podsolic soil from Payagala (PY). Three BC rates were 0, 2 and 5% (w/w) from RW BC. Soils and BC samples were characterized for some important chemical properties using standard methods. In the first experiment each soil type was amended with the 3 BC rates and incubated in four replicates at 80% of water holding capacity (WHC), for 4 weeks. Available P contents were measured at 0, 1, and 4 weeks after incubation. In the second experiment, P fixation capacity of the three soils amended with three different BC rates was assessed, in triplicate, using the Portch and Hunter (1998) method with slight modifications. Five ml solution containing 0, 20, 40, 60 and 80 ppm of P were added to BC amended and unamended soils after air-drying of 3-5 days. Available P from these two experiments were extracted according to the Bray II (Bray and Kurtz, 1945) method and determined by using a SKALAR San++auto analyzer. Data were analyzed using PROC GLM program of the SAS software packageen_US
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/8524/36-PLT-Effect%20of%20Biochar%20on%20Phosphorus%20Availability%20and%20Fixation%20in%20Some%20Rubber%20.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.subjectAgricultureen_US
dc.subjectExport Agricultureen_US
dc.subjectCrop Productionen_US
dc.subjectRubber Productionen_US
dc.subjectRubber Technologyen_US
dc.subjectSoil Scienceen_US
dc.titleEffect of Biochar on Phosphorus Availability and Fixation in Some Rubber Growing Soils of Sri Lankaen_US
dc.title.alternativeResearch Symposium 2013en_US
dc.typeOtheren_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
36-PLT-Effect of Biochar on Phosphorus Availability and Fixation in Some Rubber .pdf
Size:
177.69 KB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Research Symposium-2013