scholarly journals KAJIAN MINUS ONE TEST DAN KESUBURAN LAHAN PASIR UNTUK BUDIDAYA TANAMAN BAWANG MERAH

2017 ◽  
Vol 20 (1) ◽  
pp. 25
Author(s):  
Sutardi ,
Keyword(s):  
Block Design ◽  
Limiting Factors ◽  
Limiting Factor ◽  
Sandy Land ◽  
Survey Techniques ◽  
Second Stage ◽  
Randomized Block Design ◽  
Complete Fertilizer ◽  
Two Stages ◽  
Physical And Chemical

<p>Soil Fertilyty and Minus One Test of Sandy Land For Shallot. Besides to prove the potential of N, P and K nutrients as limiting factors for shallot plants, the objectives of this research was to find out physical characteristics and fertility in sandy land (soils) in Bantul, Kulon Progo district, Special Region of Yogyakarta. Research was carried out in two stages. The first stage was survey and analysis of sandy land in Bantul and Kulon Progo by the age of<br />amelioration. Survey techniques was based on four age ameliorations of sandy soil. The second stage was conducted using complete randomized block design sigle factor. The second was minus one test of N, P and K consists of five treatments: 1 .TP = no fertilizer (control), 2. PK (-N) = complete fertilizer without N, 3. NK (-P) = complete fertilizer<br />without P, 4.NP (-K) = complete fertilizer without K and 5. NPK = complete fertilizer. The results showed that the introduction of amelioration techniques changed and improved soil different changes in physical and chemical of sandy land. Ameliorant addition into the planting media had positive with the percentage change in silt (0.55-2.37%) and clay (0.45-0.51%) increasing significantly, followed by levels P2O5 and lowerring the sand (1.05-2.07%). The result of minus one test fertilizer on sandy land for the shallot that fertilizer N become the main limiting factor P and K light whereas P and K nutrients were the limiting factor on sandy land for shallot. </p><p>Keywords: Ameliorant, sandy land, shallot</p><p>ABSTRAK<br />Tujuan penelitian untuk membuktikan bahwa hara N, P, dan K faktor pembatas untuk pertumbuhan dan produksi bawang merah pada lahan pasir pantai. Disamping itu juga mengetahui perubahan sifat fisik dan kimia tanah lahan pasir pantai pada berbagai blok dengan umur penggunaan lahan yang berbeda. Penelitian dilakukan dua tahap yaitu pertama survei dan analisis tanah lahan pasir di Kabupaten Bantul dan Kulon Progo D.I. Yogyakarta berdasarkan umur ameliorasi. Penelitian kedua mengetahui faktor pembatas menggunakan Rancangan Acak Kelompok Lengkap (RAKL) faktor tunggal. Perlakuan minus one test hara N, P dan K terdiri dari lima perlakuan: 1. TP = tanpa pupuk<br />(kontrol), 2. PK (-N) = pupuk lengkap kurang N, 3. NK (-P) = pupuk lengkap kurang P, 4. NP (-K) pupuk lengkap kurang K dan 5. NPK pupuk lengkap diulang 5 kali. Hasil kajian menunjukkan bahwa pengelolaan lahan pasir dengan input bahan amelioran terjadi perubahan sifat fisik dan kimia sehingga kesuburan lahan meningkat. Peningkatan<br />tersebut karena terjadi perubahan persentase fraksi debu (0,55-2,37%) dan (0,45-0,51%) liat meningkat diikuti kadar hara P2O5, menurunkan fraksi pasir (1,05-2,07%) secara nyata. Hara N menjadi faktor pembatas utama, sedangkan K dan P merupakan pembatas ringan pada lahan pasir untuk bawang merah.</p><p>Kata Kunci: Amelioran, lahan pasir, bawang merah</p>

scholarly journals PEMUPUKAN PADA BUDIDAYA BAWANG MERAH SPESIFIK LOKASI PADA LAHAN PASIR

Agrin ◽  
2018 ◽  
Vol 21 (2) ◽  
Author(s):  
Sutardi Sutardi
Keyword(s):  
Block Design ◽  
Soil Nutrient ◽  
Limiting Factor ◽  
Optimal Dosage ◽  
Sandy Land ◽  
Single Factor ◽  
Specific Location ◽  
Randomized Block Design ◽  
K Fertilizer ◽  
And Control

Kalium merupakan salah satu unsur hara kunci keberhasilan dalam mendukung produksi bawang merahspesifik lokasi di lahan pasir selatan. Tujuan penelitian untukmengetahui dosis optimal pupuk kalium pada bawangmerah spesifik lokasi lahan pasir. Penelitian dilaksanakan selama dua musim kemarau pada bulan Juni-September2015 dan Juni-September 2016 di lokasi Kelompok Tani Manunggal, Desa Srigading, Kecamatan Sanden,Kabupaten Bantul (07o 59’ 8659” S, 110o 15’ 6753” E). Penelitian menggunakan Rancangan Acak Kelompokfaktor tunggal dengan pendekatan Minus One Test yang terdiri dari 7 taraf dan kontrol diulang 3 kali. Responpemupukan kalium menggunakan Rancangan Acak Kelompok dengan 5 perlakuan tingkat dosis 0, 75, 150, 225,dan 300 kg KCl/ha. Hasil penelitian menunjukkan bahwa status hara sebelum penelitian kandungan hara kalium(Kdd) 0.18-0.25 me K/100g-1 status hara sangat rendah (SR), sehingga menjadi faktor pembatas utama. Berdasarkanminus one test dosis pemupukan optimal bawang merah spesifik lokasi lahan pasir ialah KCl 150 kg ha-1 denganpersen hasil relatif tertinggi (120%). Akan tetapi respon dosis pemupukan kalium dosis maksimum 250 kg/ha-1dengan persamaan kuadratik (R2 = 0.556). Produksi bawang merah maksimal mencapai 15-16 t/ha-1 brangkasan(setara dengan 12.75-13.6 t/ha umbi) dengan rendemen umbi ±15%. Oleh karena itu, dalam implementasinyadiperlukan dosis kalium optimal secara spesifik lokasi, tidak dosis umum secara nasional.Kata kunci: lahan pasir, bawang merah, kalium, pupuk NPKABSTRACTPotassium is one of success key of soil nutrient on shallot production support on south sandy land. Theaimed of research is to determine potassium fertilizing respon on shallot in specific location on sandy land. Thestudy was conducted on June-September 2015 and June-September 2016 on Manuggal farmer group, SrigadingVillage, Sanden Districts, Bantul Regency (07o 59’ 8659” S, 110o 15’ 6753” E). The experiment used randomizedblock design with single factor using a with single factor randomized block design with Minus One Test approachconsists of 7 sides and control is repeated for 3. Effectivity respons K fertilizer used randomized block design with5 dose levels of fertilizer treatments 0, 75, 150, 225, and 300 kg KCl/ha. The results showed that soil nutrient ofpotassium (Kdd) is 0,18-0,25 me K/100 g-1 (very low), thus becoming main limiting factor. Minus one test shallotoptimal fertilizing dose sandy land specific location is KCl 150 kg ha-1 with percent result relatively (120%).However, dose response of potassium with maximum dose is 250 kg/ha-1 of quadratic equations R2 0,556.Maximum shallot production reach 15-16 t/ha equivalent with 12,75-13,6 t/ha tuber. Therefore, in itsimplementation required of optimal dosage of potassium on specific location not general national.Key words: sandy land, shallot, potassium, N P K fertilization

scholarly journals Studi Karakter Mutu Buah Pepaya IPB

2016 ◽  
Vol 1 (1) ◽  
pp. 17 ◽  
Author(s):  
Ketty Suketi ◽  
Roedhy Poerwanto ◽  
Sriani Sujiprihati ◽  
, Sobir ◽  
Winarso D.Widodo
Keyword(s):  
Ascorbic Acid ◽  
Block Design ◽  
Ascorbic Acid Content ◽  
Chemical Characteristic ◽  
Carotenoid Content ◽  
Fruit Peel ◽  
Randomized Block Design ◽  
Main Plot ◽  
Two Stages ◽  
Physical And Chemical

<p>ABSTRACT</p><p><br />The objective of the experiment was to investigate the physical and chemical characteristic of eight genotypes of papaya i.e. IPB1, IPB 2A, IPB 3, IPB 3A, IPB 4, IPB 7, IPB 8, and IPB 9 on two stages of ripening period based on percentage of the yellow area of fruit peel (75% yellow and 100% yellow). The fruits were <br />picked at 25% yellow of fruit peel colour. The experiment was conducted in split plot wi th completely randomized block design. The main plot was ripening periods of 75% and 100% ripe, while the genotypes were taken at subplot. There was no significant different on physical and chemical characteristics between papaya at stadium 75% and 100% yellow. Flesh firmness of IPB 9 was better than IPB 1, IPB 4 and IPB 8. Ascorbic acid content of IPB 4 (107.36 mg/100 g) was higher than that of IPB 2A and IPB 3A. Carotenoid content of IPB 4 (29. 73 mg/100g) was higher than that of the other genotypes.</p><p><br />Key words: Carica papaya, physical characteristic, chemical characteristic, ascorbic acid, carotenoid</p>

scholarly journals Combining ability analysis of maize lines under optimal and low nitrogen stress

2021 ◽  
Vol 911 (1) ◽  
pp. 012010
Author(s):  
Nining N. Andayani ◽  
M. Arif Subchan ◽  
Roy Efendi ◽  
M. Aqil ◽  
M. Azrai
Keyword(s):  
Grain Yield ◽  
Block Design ◽  
Diallel Cross ◽  
Yield Potential ◽  
Limiting Factor ◽  
Maize Breeding ◽  
Randomized Block Design ◽  
Hybrid Maize ◽  
Two Stages ◽  
Half Diallel

Abstract Most of the land for maize development in Indonesia has low N limiting factor, thus it is necessary to develop a proper maize breeding programs tolerant to low N conditions. One of the breeding methods suitable for low N evaluation is the diallel method between inbred parents (homozygous lines) that are tolerant of low N stress. The aim of this study was to assess the genotype tolerance to low N with comparable yields. The research consisted of two stages. The first stage is the development of hybrid maize grains (F1) using the half diallel cross method. This activity was carried out in KP. Maros, Research Center for Cereal Crops. A half-diallel cross refers to the Griffing IV method, by involving 11 low N-tolerant genotypes (AVLN 100-1, AVLN 118-2, AVLN 122-2, AVLN 124-4, AVLN 32-3, AVLN 83-1, AVLN 83-4, AVLN 83-6, AVLN 86-2, MAL 04, and AVLN 124-9). The second stage was carried out in KP. Bajeng to evaluate 52 genotypes of hybrid maize from diallel crosses plus four hybrid varieties Advanta 777, Bisi 18, P 27 and JH 37 for control. The experiment was carried out under conditions of low N stress (100 kg N/ha) and normal N (200 kg N/ha). The experiment used a randomized block design with three replications. Hybrids that are tolerant (T) under conditions of low N stress was best indicated by AVLN 83-4/AVLN 124-4 genotype pair, with significant higher grain yield than Bisi-18 and JH 37 varieties. This hybrid produced average grain yield of 7.87 t/ha under both conditions. Inbred maize genotypes classified as medium tolerant (MT) were AVLN 83-4/AVLN 124-9, AVLN 124-4/AVLN 86-2, AVLN 122-2/AVLN 124-4, AVLN 83-1/AVLN 124-9, has similar yield potential as to the control varieties.

scholarly journals HISTOLOGICAL ANALYSIS AND PERFORMANCE OF SOUR PASSION FRUIT POPULATIONS UNDER DIFFERENT ROOTSTOCKS RESISTANT TO Fusarium spp

2018 ◽  
Vol 40 (1) ◽  
Author(s):  
Moisés Ambrósio ◽  
Willian Krause ◽  
Celice Alexandre Silva ◽  
Laís Alves Lage ◽  
Natan Ramos Cavalcante ◽  
...  
Keyword(s):  
Histological Analysis ◽  
Block Design ◽  
Welding Process ◽  
Anatomical Study ◽  
Optical Microscope ◽  
Passion Fruit ◽  
Randomized Block Design ◽  
Physical And Chemical ◽  
Sour Passion Fruit

ABSTRACT The present study aimed to describe histological traits of the graft welding process and evaluate the effect of rootstocks on the physical and chemical traits and the productivity of sour passion fruit populations. The experiment was arranged in a randomized block design, in a 4x2 + 4 factorial scheme (cultivars / canopy x rootstocks), three replicates and nine plants per plot. Commercial cultivars and populations and Passiflora alata and P. nitida rootstocks, in addition to ungrafted plants were used as canopy. Cleft grafting was the grafting type adopted. Traits analyzed such as productivity and physical and chemical quality of fruits were submitted to analysis of variance and compared by the Tukey test. The canopy morphology was evaluated according to descriptors of the Ministry of Agriculture, Livestock and Supply. Grafting was carried out for each graft/rootstock combination for histological analysis. Sections were obtained by freehand cuts, stained and mounted on semi-permanent slides, examined under optical microscope and photomicrographed. Rootstocks affected the early cultivation and reduced productivity and number of fruits of passion fruit populations. Grafting did not affect the quality of fruits or the canopy morphology. Considering the complete culture cycle, P. alata species is able to be used as rootstock. The anatomical study demonstrates the occurrence of better compatibility in the connection of P. edulis tissues on P. alata, compared to grafting on P. nitida.

scholarly journals Populasi Hama dan Musuh Alami pada Tiga Cara Budidaya Padi Sawah di Sukamandi

Agrikultura ◽  
2018 ◽  
Vol 29 (1) ◽  
pp. 35
Author(s):  
N. Usyati ◽  
Nia Kurniawati ◽  
Ade Ruskandar ◽  
Oco Rumasa
Keyword(s):  
Natural Enemy ◽  
Block Design ◽  
Rice Variety ◽  
Rice Cultivation ◽  
Limiting Factors ◽  
Pest Damage ◽  
Organic Rice ◽  
Randomized Block Design ◽  
Rice Yields ◽  
The Difference

ABSTRACTPest and natural enemy population in three different rice cultivation in Sukamandi RegionSome on limiting factors in rice production include the cultivation system and pest damage. To suppress the damage, several control techniques have been applied, such as technical culture. The aim of this study was to gain information on population and pest damage, as well as natural enemy population in three different rice cultivation systems. The study was arranged in Randomized Block Design with three treatment and 9 replications. The treatments were: 1) organic rice cultivation, 2) semi organic, and 3) farmer technique. The used rice variety was Inpari 30. The plot size was 6 m x 90 m. The variables observed included population and pest damage, natural enemy population, and rice yields. Thirthy two rice hills were observed randomly in diagonal direction, with 2 weeks interval from two weeks after transplanting until harvest. The data were analyzed by analysis of variance (Anova) and the difference among the treatments was evaluated with Duncan multiple area test at 5% level. The results showed that brown plant hoppers population on organic rice cultivation is lower than semi-organic rice cultivation and farmer technique, but there were no difference of natural enemy population among treatments. The lowest yield was obtained from the organic rice cultivation (2.67 t/ha).Keywords: Rice cultivation, Pests, Natural enemiesABSTRAKBeberapa faktor pembatas produksi padi diantaranya adalah cara budidaya dan adanya serangan hama. Untuk menekan serangan hama, beberapa teknik pengendalian telah diterapkan diantaranya adalah pengendalian secara kultur teknis (cara budidaya). Pada MT-2 tahun 2016, penelitian dengan tujuan mendapatkan informasi mengenai populasi dan serangan hama, serta populasi musuh alami pada tiga cara budidaya padi telah dilakukan di lahan kebun percobaan Balai Besar Penelitian Tanaman Padi Sukamandi. Rancangan yang digunakan adalah Rancangan Acak Kelompok (RAK) dengan tiga cara budidaya dan diulang sebanyak sembilan kali. Adapun cara budidaya yang digunakan terdiri atas:1) budidaya padi organik; 2) semi organik; 3) cara petani. Varietas yang digunakan adalah Inpari 30. Ukuran plot 6 m x 90 m. Variabel yang diamati meliputi populasi dan tingkat serangan hama, populasi musuh alami, dan hasil panen. Pengamatan dilakukan secara langsung di pertanaman pada 32 rumpun sampel secara acak diagonal dengan interval dua minggu sekali mulai umur tanaman dua minggu setelah tanam sampai menjelang panen. Data yang diperoleh dianalisis dengan analisis ragam (Anova) dan perbedaan antar perlakuan dievaluasi dengan uji wilayah berganda Duncan pada taraf 5%. Hasil penelitian menunjukkan bahwa populasi hama wereng coklat pada cara budidaya padi organik lebih rendah dibandingkan cara budidaya padi semi organik dan budidaya padi cara petani, tetapi tidak ada perbedaan populasi musuh alami pada cara budidaya padi organik, cara budidaya padi semi organik dan budidaya padi cara petani. Hasil panen terendah (2,67 t/ha) terlihat pada perlakuan budidaya padi organik.Kata Kunci: Budidaya padi, Hama, Musuh alami

scholarly journals Growth and Gas Exchange of Cucurbita pepo L. Under Nitrogen and Silicon Fertilization

2019 ◽  
Vol 11 (9) ◽  
pp. 83
Author(s):  
Jackson de M. Alves ◽  
Alex S. de Lima ◽  
Cesenildo de F. Suassuna ◽  
Francisco R. A. Figueiredo ◽  
Toshik Iarley da Silva ◽  
...  
Keyword(s):  
Cucurbita Pepo ◽  
Polynomial Regression ◽  
Foliar Application ◽  
Growth Parameters ◽  
Block Design ◽  
Limiting Factor ◽  
Simultaneous Application ◽  
Gas Exchanges ◽  
Nitrogen Levels ◽  
Randomized Block Design

Zucchini (Cucurbita pepo L.) is a horticultural crop of great socioeconomic importance in Brazil and in the world. However, inappropriate fertilization management, such as over-fertilization of soils, may become a limiting factor for its development. Thus, the aim of this study was to evaluate the morpho-physiological behavior of zucchini submitted to nitrogen (N) doses applied via soil and foliar application of silicon (Si). The treatments were distributed in split-plot scheme in a randomized block design, with three replications. The plot was formed by silicon levels (0.0 and 6.0 g plant-1) and the subplots constituted by five nitrogen levels (30, 60, 90, 120 and 150 kg ha-1), adding up to 30 experimental units. Gas exchanges and growth parameters were assessed at 35 days after planting. The data were submitted to analysis of variance by the F test and in the cases of significance was performed a polynomial regression analysis for the nitrogen factor and Tukey test for the silicon factor. The supply of Si positively enhances the effects of N on growth characteristics and gas exchanges of zucchini. The simultaneous application of Si and N does not influence the leaf area of zucchini. The N dose of 93.9 kg ha-1 provides greater assimilation of CO2 in zucchini plants under the conditions in which the experiment was performed.

scholarly journals Fertilization the Omission One Test as Determination Limiting Factors for Maize Biomass (Zea mays L.)

2021 ◽  
Vol 4 (2) ◽  
pp. 94-105
Author(s):  
Koko Tampubolon ◽  
Bagus Fitra Azmi ◽  
Perdana Andriano Tamba ◽  
Ayu Widya Lestari ◽  
Kamaruddin Kamaruddin ◽  
...  
Keyword(s):  
Plant Height ◽  
Leaf Growth ◽  
Block Design ◽  
Relative Yield ◽  
Animal Husbandry ◽  
Dry Weight ◽  
Limiting Factors ◽  
Limiting Factor ◽  
Test Technique ◽  
The Impact

Introduction: The research was aimed to obtain information on the impact of omission one test fertilization as a determination limiting factors for the growth and biomass of maize in variety Bonanza F1. Materials and Methods: The research was located in the experimental field, Faculty of Agriculture and Animal Husbandry, Universitas Tjut Nyak Dhien, Medan from December 2020 until February 2021. The research was applied by Randomized Block Design in non-factorial through fertilization of omission one test that has been converted (urea : SP-36 : KCl = 0.75 : 0.50 : 0.125 g polybag-1). The treatment of this research include P0 = non-fertilization; P1= N+P+K; P2= P+K; P3= N+K; P4= N+P using three replications. The parameters include plant height, leaf growth, total fresh weight, total dry weight, and the percentage of relative yield then processed using ANOVA and continued with DMRT at 5% ± standard error with SPSS v.20 software. Results: Informed that the omission one test technique significantly improved all the characteristics of maize in the variety Bonanza F1. The highest increase in plant height was found in the N+P of 83.65%, meanwhile, the highest leaf and biomass growth characters were found in N+P+K, ranged of 50.00 to 177.81% and 487.60 to 507.37%, respectively. It was obtained that the limiting factor for the maize growth in variety Bonanza F1 was found in the un-fertilization of nitrogen.

scholarly journals Potential use of ash from sugarcane bagasse to produce passion fruit seedlings

2020 ◽  
pp. 408-414
Author(s):  
Henrique Guimarães de Favare ◽  
Sandra da Costa Preisigke ◽  
Leonarda Grillo Neves ◽  
Kelly Lana Araújo ◽  
Milson Evaldo Serafim ◽  
...  
Keyword(s):  
Sugarcane Bagasse ◽  
Soil Structure ◽  
Block Design ◽  
Dry Mass ◽  
Passion Fruit ◽  
Randomized Block Design ◽  
The Family ◽  
Set Up ◽  
Physical And Chemical ◽  
Potential Use

The production of good quality passion fruit seedlings depends on substrates with adequate physical and chemical characteristics. Therefore, this experiment was conducted to evaluate the effect of doses of ash from burning of sugarcane bagasse on improvement of traits of the substrate "gully soil". The experiment was set up in a greenhouse and arranged in randomized block design, in a 2x7x2 factorial scheme. The following factors and their respective levels were studied: (i) soil structure,- aggregating between 4 and 10 mm and <2 mm; (ii) ash doses - 0; 1.5; 3; 6; 12; 24; and 48 t ha-1; (iii) families of passion fruit - F29 and F48. The use of ash combined to the soil with structure <2mm significantly increased the production of shoot fresh mass and shoot dry mass for both families studied. The density of the substrate obtained by the mixture of ash and gully soil (soil) decreased as ash doses increased, regardless of the size of the aggregates and the family studied.

scholarly journals Germination and morphophysiology of passion fruit seedlings under salt water irrigation1

2018 ◽  
Vol 48 (3) ◽  
pp. 229-236 ◽  
Author(s):  
Jailma Ribeiro de Andrade ◽  
Aldair de Sousa Medeiros ◽  
Sebastião de Oliveira Maia Júnior ◽  
Leila de Paula Rezende ◽  
João Correia de Araújo Neto
Keyword(s):  
Salt Water ◽  
Block Design ◽  
Photosynthetic Apparatus ◽  
Passion Fruit ◽  
Growth And Yield ◽  
Leaf Biomass ◽  
Agricultural Crops ◽  
Randomized Block Design ◽  
Four Levels ◽  
Two Stages

ABSTRACT The use of salt water in irrigation can reduce the growth and yield of agricultural crops. This study aimed to assess the germination, emergence, physiology and growth of passion fruit seedlings of two varieties under salt water irrigation. The study was conducted in two stages: the first carried out in a laboratory and the second in a greenhouse, using a randomized block design, in a 2 x 4 factorial scheme, corresponding to two passion fruit varieties (BRS RC and BRS GA1) and four levels of irrigation water electrical conductivity (0.2 dS m-1, 2.2 dS m-1, 4.2 dS m-1 and 6.2 dS m-1), with four replications. The BRS GA1 variety exhibited the highest germination index and rate, in the germination stage, despite being more sensitive to salinity than the BRS RC. There was no damage to the photosynthetic apparatus in the BRS GA1 seedlings during growth, as demonstrated by the higher leaf biomass, when compared to the BRS RC variety.

scholarly journals PENGARUH PENAMBAHAN LUMPUR AKTIF PADA BIOFILTER ANOKSIK-OKSIK DALAM MENURUNKAN KADAR AMONIA AIR LIMBAH RUMAH SAKIT

2019 ◽  
Vol 13 (1) ◽  
pp. 49
Author(s):  
Wayan Trisna Dewi ◽  
I Wayan Budiarsa Suyasa ◽  
I Nyoman Rai
Keyword(s):  
Activated Sludge ◽  
Block Design ◽  
Quality Standard ◽  
Suspended Solid ◽  
Hospital Wastewater ◽  
Randomized Block Design ◽  
Increasing Demand ◽  
Two Stages ◽  
Demand For Health ◽  
And Control

Development of the population and the increasing demand for health services has led to the increase in the number of hospitals, both government hospital and privet hospitals. The presence of ammonia as a result of protein decomposition can be toxic in the waters. The application of anoxic-oxic biofilter system is an attempt to be able to reduce ammonia levels in hospital wastewater. In the process of anoxic-oxic biofilter, contact occurs between the gravel media and microorganism to form biofilms which can accelerate the degradation of organic matter and the nitrification process. This study aims to obtain the best activated sludge source in reducing ammonia levels of wastewater applied to the anoxic-oxic biofilter system applied. This research was contucted in two stages in which the first stage of active mud nursery was carried out from three sources, namely WWTP Wangaya Hospital Denpasar, WWTP of PTN Hospital Udayana University and WWTP of Bangli Hospital for six days. At this stage a Mixed Liquor Volatile Suspended Solid (MLVSS) value is measured which shows the growth rate of biomass in activated sludge. The second stage is applivation of avtivated sludge and control to the anoxic-oxic biofilter system to reduce ammonia levels in hospital wastewater for five days of processing. This study use a randomized block design with four treatments and three replication. The results showed that the best activated sludge was obtained through nursery from WWTP of Wangaya Denpasar Hospital which was shown by the highest biomass growth (MLVSS Value) of 2433.3 mg/L and the highest reduction in ammonia reached a final level of 0.53 mg/L. The levels of effectiveness of the process of decreasing ammonia levels by 94.70% and has been able to pass the specified quality standard effectiveness percentage (90%) for five days of processing. The value of this effectiveness is the highest compared to the controls and other activated sludge treatment.

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