Okra response to soil amended with rice husk biochar and phosphate fertilizers

Tee, Kwee Lian (2012) Okra response to soil amended with rice husk biochar and phosphate fertilizers. Universiti Malaysia Sabah. (Unpublished)

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Abstract

This study was conducted at the School of Sustainable Agriculture, Universiti Malaysia Sabah, Sandakan Campus, Sabah for three months using polybags under rain shelter to investigate the okra response to soil amended with rice husk biochar and phosphate fertilizers. The objectives of this experiment were to determine the effect of rice husk biochar, Christmas Island rock phosphate (CIRP) and triple super phosphate (TSP) on the growth of okra and soil chemical properties. This factorial experiment was arranged in completely randomized design (CRD) with five replicates per treatment. The two factors involved were: (i) two types of phosphate fertilizers - CIRP (P1) and TSP (P2) and four biochar application rates - 0 (B1), 5 (62), 10 (63) and 20 (B4) t ha⁻¹. Plant height, total dry weight (TDW), soil organic matter (SOM), total organic carbon (TOC), soil PHH2O, soil pHKCL and available phosphorus (AP) were measured and analyzed by two- way ANOVA at 5% level of significance using SPSS software version 20. Post hoc comparison was conducted using Tukey Significant difference test. There was significant interaction between the types of fertilizers and the biochar application rates for SOM and TOC. B2 resulted in the highest mean for both SOM and TOC with the values of 5.97% and 4.33% respectively. P2 always showed significantly higher mean than Pi for TDW, soil pHKO and AP. Across biochar application rates, Significant differences were observed for plant height, TDW, soil pHKO and AP. In comparison to the control treatment, the plant height, soil pHKO and AP for B4 were significantly increased by 48.0%, 1.3%, and 109.1% respectively. For TDW, B3 resulted in the highest mean of 37.95 g, which was 36.9% higher than B1. There was no significant effect of biochar application rates or types of phosphate fertilizers on soil pHH2Q. It could be concluded that combination of biochar with phosphate fertilizer showed improvement in okra growth and soil chemical properties than fertilizer alone. Long term field experiment would be necessary to evaluate the interaction effect of biochar and phosphate fertilizers on crop productivity and on sustaining soil fertility.

Item Type:Academic Exercise
Uncontrolled Keywords:okra, soil, rice husk biochar, phosphate fertilizers, polybag
Subjects:S Agriculture > SB Plant culture
Divisions:FACULTY > Faculty of Sustainable Agriculture
ID Code:17042
Deposited By:Munira M
Deposited On:08 Jun 2017 12:06
Last Modified:08 Jun 2017 12:06

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