Anion exchange capacity of chicken litter biochar in regulating phosphate retention of an acid soil

Low, Xian Jie (2018) Anion exchange capacity of chicken litter biochar in regulating phosphate retention of an acid soil. [Project Paper] (Submitted)

Text lp FSPM 2018 16 WITH PSWD.pdf Download (3MB)

Abstract

Management of Anion Exchange Capacity ( AEC) and phosphate are important in sustainable agriculture management because both of them have direct effects on the availability of P for plants uptake that would directly affect soil productivity and fertility. An incubation study was carried out in the Research Centre of UPMKB for 40 days with different treatments. The objective of the study was to determine the anion exchange capacity of an acid soil and retention of phosphate ions of an acid soil after amended with chicken litter biochar. The available P of soil samples was determined using Bray II method whereas total P are determined using Aqua Regia method. For AEC, solution was extracted by centrifugation with ammonium chloride, NH4CI and potassium nirate, KNO3 then silver nitrate, AgNO3 was added into the samples solution to determine the weight of silver chloride precipitates, AgCI. Acid soils amended with chicken litter biochar showed higher P content but did not show any significant effect on AEC. This happened due to organic anions and acids released by chicken litter biochar after decomposition binded with Al and Fe ions in the soils thus increased available P but it didn't have effect on AEC due to reduction in photonation by Al, Fe and H ions in the soil as a result of the binding of organic anions and acids with these ions. It can concluded that acid soils amended with chicken litter biochar can improve P availability and not AEC.

Item Type:	Project Paper
Subjects:	S Agriculture > S Agriculture (General)
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Ms. Hairoon Juhaili
Date Deposited:	11 May 2026 01:08
Last Modified:	11 May 2026 01:08
URI:	http://psaspb.upm.edu.my/id/eprint/2724

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