Abstract
[EFFECT OF FLY ASH APPLICATION FROM POWER PLANT OF PT. GREAT GIANT PINEAPPLE ON SOIL BIOLOGYCAL ACTIVTY IN MARGINAL LAND]. Fly ash is a coal combustion waste containing nutrients that can be used to improve the soil fertility. The waste continues to increase but its handling is still limited because it is still classified as hazardous and toxic waste (B3). This study aims to determine the soil biological activity due to the application of fly ash and cow manure on marginal soils. The study was conducted using a completely randomized block design arranged factorial. The first factor is the dosage level of fly ash (F), namely 0 g/pot (0 ton/ha), 75 g/pot (50 ton/ha), 150 g/pot (100 ton/ha), and 225 g/pot (150 ton/ha) and the second factor is the dose of cow manure with three levels, namely 15 g/pot (10 ton/ha), 30 g/pot (20 ton/ha), and 45 g/pot (30 ton/ha). The observation parameters were (total population of fungi, bacteria, and soil respiration). The results showed that the addition of fly ash at various doses affected the soil biological activity by increasing the population of fungi, bacteria and soil respiration. The highest population of microorganisms was fungi, which was 17.8 x 107 Log CFU/g, bacteria 13.7 x 105 Log CFU/g, while the highest soil respiration was 54.53 mg CO2 at a dose of 100 ton/ha fly ash. In addition, the application of cow manure at a dose of 10, 20, 30 ton/ha did not affect observed variables.
Highlights
Fly ash merupakan limbah pembakaran batu bara dengan kandungan unsur hara yang dapat digunakan untuk memperbaiki tanah
This study aims to determine the soil biological activity due to the application of fly ash and cow manure on marginal soils
The results showed that the addition of fly ash at various doses affected the soil biological activity by increasing the population of fungi, bacteria and soil respiration
Summary
Penelitian menggunakan Rancangan Acak Kelompok Lengkap yang disusun secara Faktorial. Faktor pertama adalah level dosis fly ash (F) yaitu f0= 0 gram/ pot (0 ton/ha), f1= 75 gram/pot (50 ton/ha), f2= 150 gram/pot (100 ton/ha), dan f3= 225 gram/pot (150 ton/ha) dan faktor kedua adalah dosis kompos kotoran sapi dengan dua taraf yaitu c1=15 (10 ton/ha), c2= 30 gram/pot (20 ton/ha),dan c3=45 gram/pot (30 ton/ha). Media tanam yang digunakan seberat 3 kg tanah kering. Masing-masing percobaan dilakukan pengulangan sebanyak tiga kali sehingga secara keseluruhan terdapat 36 pot percobaan. Variabel analisis aktivitas biologi tanah seperti total bakteri, total fungi, respirasi tanah, dilakukan setelah 4 minggu. Analisis data menggunakan sidik ragam (Anava) pada selang kepercayaan 95%. Perlakuan yang berpengaruh nyata dilakukan uji Beda Nyata Terkecil (BNT) taraf 5%
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