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THE EFFECT OF MICRO PARTICLE STEEL SLAG TOWARDS PHOSPOROUS AND HYDROGEN ON ANDISOLS Rosi Rosidah; Rina Devnita; Ridha Hudaya; Rachmat Haryanto
Jurnal Penelitian Saintek Vol 23, No 2: Oktober 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2434.228 KB) | DOI: 10.21831/jps.v23i2.19405

Abstract

This study was aimed at determining the effect of steel slag micro particles on Phosphorus (p), p-available retention and interchangeable Hydrogen (h-dd) on Andisol. The material used in this study was Andisol and steel slag. The Andisol was obtained from PTPN VIII-Ciater tea plantations (1250 m asl) on the eastern slope of Tangkuban Perahu Mountain, Subang, West Java. The steps taken were soil sampling using disturbed soil extraction methods using Minipit technique, soil sample filtering, weighing, mixing soil samples with steel slag from PT Krakatau Steel Serang, refining done using the Top-Down method, incubating and then analyzing properties soil chemistry. The chemical properties of the soil analyzed were P, P-available and H-dd retention. P retention was analyzed by the Blackmore method, P-available was analyzed using the Bray I, Bray II, and Olsen methods. H-dd was analyzed by the Titration method. The data obtained were then carried out statistical tests with variance analysis (ANOVA) with RAL environmental design and Duncan test. The results showed that the micro-application of steel slag particles had an effect on available P and P retention but had no affect on H-dd.PENGARUH PARTIKEL MIKRO TERAK BAJA TERHADAP RETENSI FOSFOR DAN HIDROGEN PADA ANDISOLPenelitian ini bertujuan untuk mengetahui pengaruh partikel mikro terak baja terhadap retensi Fosfor (p), p-tersedia dan Hidrogen dapat dipertukarkan (H-dd) pada Andisol. Bahan yang digunakan dalam penelitian ini adalah andisol dan terak baja. Andisol didapat dari perkebunan teh PTPN VIII-Ciater (1250 m dpl) pada lereng bagian timur Gunung Tangkuban Perahu, Subang, Jawa Barat. Tahapan yang dilakukan adalah pengambilan sampel tanah menggunakan metode pengambilan tanah terganggu dengan teknik minipit, penyaringan sample tanah, penimbangan, pencampuran sampel tanah dengan terak baja yang berasal dari PT Krakatau Steel Serang, penghalusan yang dilakukan dengan metode Top-Down, penginkubasian dan kemudian penganalisaan sifat kimia tanah. Sifat kimia tanah yang dianalisi adalah retensi P, P-tersedia dan H-dd. Retensi P dianalisis dengan metode Blackmore, P-tersedia dianalisis menggunakan metode Bray I, Bray II, dan Olsen. H-dd dianalisi dengan metode titrasi. Data yang didapat selanjutnya dilakukan uji statistik dengan analisis sidik ragam (Anova) dengan rancangan lingkungan RAL dan uji Duncan. Hasil penelitian menunjukkan bahwa Aplikasi mikro partikel terak baja berpengaruh terhadap retetnsi P dan P-tersedia tetapi tidak berpengaruh terhadap H-dd.
Azotobacter and Pseudomonas Population in Rhizosphere and Yield of Choy Sum following Chemical Fertilizer and Biofertilizer application Reginawanti Hindersah; Adita Rizky Syntianis; Ade Setiawan; Rina Devnita; Nursuhud Nursuhud
Agrologia Vol 12, No 1 (2023): Agrologia: Jurnal Ilmu Budidaya Tanaman
Publisher : Faculty of Agriculture, Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ajibt.v12i1.1774

Abstract

Inoculation of beneficial microbes is a way to improve the population of rhizobacteria that has a role in nutrient cycle and hence reduce the level of chemical fertilizer. A pot  experiment was performed to evaluate the effect of and consortia biofertilizer combined with various dose of NPK compound fertilizer on the population of nitrogen-fixing Azotobacter sp. and phosphate solubilizing Pseudomonas sp. in rhizosphere and yield of choy sum (Brassica juncea L.). The experimental was setup in completely randomized block design consisted of ten combinations of various biofertilizer and inorganic fertilizer dose; and three replications. The results showed that Biofertilizer inoculation with or without chemical fertilizer did not improve the population of Azotobacter and Pseudomonas in the rhizosphere but increase the shoot weight of choy sum. Higher shoot weight was showed by crops with ¾ dose of NPK combined with recommended or reduced dose of fertilizer; and recommended dose of NPK and biofertilizer. This experiment verified that the used of consortia biofertilizer composed of Nitrogen-fixing bacteria and phosphate-solubilizing microbes reduced 50-75% dose of NPK.