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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan)
Mochammad Munir
Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Environmental Science

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PENGARUH PEMBERIAN BIOCHAR TERHADAP BEBERAPA SIFAT BIOKIMIA TANAH DAN PERTUMBUHAN TANAMAN BAWANG MERAH PADA LAHAN TERCEMAR RESIDU PESTISIDA Sonni Senna Dimas Airlangga; Mochammad Munir; P Poniman
Jurnal Tanah dan Sumberdaya Lahan Vol. 8 No. 1 (2021)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (555.864 KB) | DOI: 10.21776/ub.jtsl.2021.008.1.4

Abstract

The production of shallots in Brebes has not been significantly free from the use of chemical pesticides. Preventive land contaminated with pesticides needs to be done, one of which is through the improvement of polluted land using biochar. The study was aimed to determine the effectiveness of the effect of urea plus nano biochar and urea plus biochar enriched by microbial consortia on the status of C-organic, pH, and soil microbial populations and their effects on profenofos residues. The experiment was designed with a Randomized Block Design with 5 treatments including: P (without biochar and microbes), B (Urea plus biochar), BM (Urea plus biochar and microbial), NB (Urea plus nano biochar), NBM (Non-biochar and microbial) Urea added with nano biochar and microbes), and repeated 4 times, so that the number of research units was 20 units. The microbes used in enriching urea plus biochar are microbial consortia, Stenotrophomonas maltophilla, Achromobacter denitrificans, Bacillus cereus, Bacillus subtilis, Bacillus thuringiengsis and Bacillus aryabathai. The results of the study include, the administration of urea plus biochar and nano biochar with microbial consortia did not have a significant effect on pH, C-organics, soil microbial populations and profenofos residues. At 35 and 63 DAP the highest pH of treatment B was 5.84, and 6.53. Organic C-35 and 63 DAP at low criteria are 1.12 - 1.30%. The highest microbial population of 35 and 63 DAP in treatment B was 485 x 106. The highest growth rate of plant length in the BM treatment with a value of 6.06 cm week-1, while the growth rate of the number of leaves in the BM treatment had a higher yield compared to other treatments , with a value of 2.88 strands week-1.
FAKTOR-FAKTOR YANG MEMPENGARUHI PRODUKTIVITAS KELAPA SAWIT (Elaeis guineensis jacq) PADA BERBAGAI AFDELING DI KEBUN BAH JAMBI PT. PERKEBUNAN NUSANTARA IV Amir Fhad Sastranegara Harahap; Mochammad Munir
Jurnal Tanah dan Sumberdaya Lahan Vol. 9 No. 1 (2022)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (526.22 KB) | DOI: 10.21776/ub.jtsl.2022.009.1.11

Abstract

North Sumatra Province, where the second-highest oil palm productivity in Indonesia, has successfully reached fresh fruit bunches (FFB) production of 5,775,631.82 tons in 2016. However, the level of oil palm productivity tends to be unstable and low. The purpose of this study was to identify and analyze factors influencing the level of oil palm productivity at the Bah Jambi Plantation PTPN IV, Simalungun Regency, North Sumatra Province. The method used in this study was the qualitative descriptive analysis method by collecting secondary data at research locations at 4 Afdeling Kebun Bah Jambi PT. Nusantara IV Plantation. The results of correlation and regression analysis showed that soil factor such as organic C, soil pH, cation exchange capacity and the availability of soil N, P, K and Mg is the most dominant factors in influencing the amount of oil palm productivity which have determination coefficient (R2) more than 90%. Meanwhile, climate factors such as evapotranspiration, duration of light exposure, wind speed and rainfall have the most role in influencing oil palm productivity which has a coefficient of determination (R2) of 95%, 94%, 88% and 33%.
Co-Authors Amir Fhad Sastranegara Harahap P Poniman Sonni Senna Dimas Airlangga