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All Journal Jurnal Hortikultura Indonesia (JHI) Agrotrop : Journal on Agriculture Science AGRITROP International Journal of Biosciences and Biotechnology Buletin Udayana Mengabdi E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) BIOTROPIA - The Southeast Asian Journal of Tropical Biology Plumula : Berkala Ilmiah Agroteknologi Jurnal Hortikultura Journal of Degraded and Mining Lands Management Agro Bali: Agricultural Journal Journal of a Sustainable Global South Udayana Journal of Social Sciences and Humanities (UJoSSH) AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Nandur

I WAYAN WIRAATMAJA

Program Studi Agroekoteknologi Fakultas Pertanian Universitas Udayana

Author-ID : 2952330

Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Public Health Social Sciences Veterinary

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Respon Produksi dan Kualitas Buah Salak Gula Pasir (Salacca zalacca var. Gula Pasir) terhadap Dosis Pupuk Hayati Mikoriza NADA SAHARA; I NYOMAN RAI; I WAYAN WIRAATMAJA
Agrotrop : Journal on Agriculture Science Vol 11 No 2 (2021)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2021.v11.i02.p09

Production and Quality of Salak Gula Pasir (Salacca zalacca var. Gula Pasir) in Response to Application of Dosages of Mycorrhiza Biofertilizer. Mycorrhiza is a fungus that live symbiosis mutualism with the root of the plant. Mycorrhiza has several benefits that improve the soil structure an increase the absorption of nutrients and water for plant. This research aimed to know response of production and quality of salak gula pasir (salacca zalacca var. Gula Pasir) fruit to dose of mycorrhiza biofertilizer application. This study used a randomized block design (RBD) with 4 levels of mycorrhiza biofertilizer dosages, i.e. 0, 50, 100, and 150 spores per 500 g of carrier media. Each treatment was repeated 10 times. The results showed mycorrhiza dose of 50, 100, and 150 spores per 500 g carrier media increase the amount of fruits bunches in each plant, the sweetness level of fruit and root infections/colonization by mycorrhiza.

Respons Pertumbuhan Bibit Salak (Salacca edulis L.) terhadap Dosis Spora Endomikoriza pada Media Pembawa Pasir Vulkanik dan Pasir Laut DEWA AYU ARI FEBRIYANTI; I WAYAN WIRAATMAJA; I KETUT SUADA
Agrotrop : Journal on Agriculture Science Vol 10 No 2 (2020)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2020.v10.i02.p04

Response of Salak Seedling (Salacca edulis L.) Growth to Endomycorrhizal Spore Doses on Volcanic Sand and Sea Sand Carrier. Endomycorrhizae has several benefits, such as increase water absorption and nutrients of plant, protect plants from root pathogens and toxic substances, play a role in improving soil structure, and increase nutrient solubility. This study aimed to determine the growth response of salak seedlings to doses of endomycorrhizal spores in media carrying volcanic sand and sea sand. This study used a factorial randomized block design (RBD) with two treatments i.e. the number of spores and the type of carriers media. The results showed no significant interaction between the number of mycorrhizal spores doses with the carrier media on all observed variables. Spores doses significantly affected stem diameter and root mycorrhizal infection variables. The highest stem diameter was achieved at the dose of 75 spores that was 1.60 cm which was significantly different from control (1.28 cm), whereas the highest root infection was obtained at the dose of 225 spores (92.50%) which significantly higher than control (36.25%). At the observation of 4 MAP (month after planting) the highest root infection was obtained at the dose of 150 spores (82.50%) compared to control (10.00%). Volcanic sand carrier media produced the highest plant dry weight (3.59 g) which was significantly different to the sea sand (2.43 g).

Respon Pemupukan Terhadap Hasil dan Kualitas Hasil Salak Gula Pasir (Salacca zalacca cv. Gula Pasir) di Luar Musim Serta Kandungan Air Dan Klorofil Daun NI MADE KESUMA DEWI; I NYOMAN RAI; I WAYAN WIRAATMAJA
Agrotrop : Journal on Agriculture Science Vol 10 No 1 (2020)
Publisher : Fakultas Pertanian Universitas Udayana

Fertilization Response to Off-Season Production and Fruit Quality of Salak Gula Pasir (Salacca Zalacca cv. Gula Pasir) and water and Chlorophyll Content of Leaves. Naturally salak Gula Pasir (Salacca zalacca cv. Gula Pasir) flowers every three months a year, but only one to two seasons of the flowers can develop into fruit. Failure of flowers develop into fruit, usually call fruit-set failure, causes the fruits be available seasonally in a short time period, only 2-3 months a year, i.e. during the harvest time (on-season period) from December to February. This research aimed to know response of fertilization to off-season production and fruits quality of salak Gula Pasir and its ralatinship to water and chlorophyll content of leaves. The study used a randomized block design with the treatment was fertilization, consists of 14 levels (fertilized according farmers’ way with leaf midrib only/control, fertilized with compost, mycorrhizal biofertilizer, inorganic NPK, combination of farmers' way and compost, combination of farmers’ way and mycorrhizal biofertilizer, combination of farmers' way and inorganic NPK, combination of compost and mycorrhizal biofertilizer, combination of compost and inorganic NPK, combination of mycorrhizal and inorganic NPK, combination of farmers’ way, compost, and mycorrhizal biofertilizer, combination of farmers’ way, compost, inorganic NPK, combination of farmers’ way, mycorrhizal biofertilizer and inorganic NPK, and combination of farmers’ way, compost, mycorrhizal biofertilizer, and inorganic NPK). Each treatment was repeated 3 times. The study was carried out in the off season period from April to Nopember 2018 at the production center of salak Gula Pasir plantation i.e. at Sibetan Village, Bebandem District, Karangasem Regency. The results showed that the highest fruit weight per tree at the off-season was obtained on combination of fertilization of farmers' way and mycorrhizal biofertilizer (of 2536.67 g) and the lowest was on control/fertilized according farmers’ way (1,220.00 g). Fertilization with compost, mycorrhizal biofertilizer, and inorganic NPK singly, or by combining it, increases the quality of off-season fruit of salak Gula Pasir, reflected by the increase of weight per fruit, fruit diameter and fruit sweetness compared to control. The lower of yield per tree and quality of fruit on control compared to other fertilization treatments was relate to low relative water content and chlorophyll content of leaves.

Efek Penggunaan Beberapa Sinar LED pada Tanaman Buah Naga Merah (Hylocereus polyrhizus) ADHIATMA DHIYAN SAPUTRA; I GUSTI ALIT GUNADI; I WAYAN WIRAATMAJA
Agrotrop : Journal on Agriculture Science Vol 10 No 2 (2020)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/AJoAS.2020.v10.i02.p09

Effects of Using Multiple LED Beams on Red Dragon Fruit (Hylocereus polyrhizus). Red dragon fruit plant (H. polyrhizus) is a tropical plant and is very adaptable to growing environments and weather changes such as sunlight, wind, and rainfall. Dragon fruit plants is a long day plants (plants that require long enough sun exposure), which means that to produce this plant requires at least 12 hours of radiation. Knowing this, there needs to be a solution so that production stability can be controlled, one of which is by modifying the environment. The purpose of this study was to determine the effect of several colors of LED light (Light Emitting Diode) at the initiation stage of dragon fruit flowers in an effort to increase production. This study used a randomized block design with four treatments and nine replications, while the treatment consisted of control plants, the administration of white LED lights, yellow LED lights and blue LED lights. Three variables were observed, namely the number of flower buds, the number of blooming flowers and the number of young fruits. The results showed that the use of yellow LED lights give the best light intensity when compared to other treatments so that the yellow LED light treatment gave the best results on each variable including 6.44 pieces for flower buds, 7.56 pieces for flowers blooms and 7.56 pieces for young fruit.

Mikropropagasi Anggrek Phalaenopsis dengan Menggunakan Eksplan Tangkai Bunga HESTIN YUSWANTI; I PUTU DHARMA; UTAMI UTAMI; I WAYAN WIRAATMAJA
Agrotrop : Journal on Agriculture Science Vol 5 No 2 (2015)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.117 KB)

Micropropagation of Phalaenopsis Orchid Using Explants of Flower Stalk. This studyaimed to obtain optimum media formulations for bud multiplication of micropropagation ofPhalaenopsis orchid using flower stalk. This study employed Completely Randomized Designwith 5 different treatments, i.e. M0 = MS + 150 ml/l coconut water + 2 g activated charcoal,M1 = MS + 1 ppm IBA+ 1 ppm BAP + 150 ml/l coconut water + 2 g/l activated charcoal M2= MS + 1ppm IBA+ 2 ppm BAP+ 150 ml/l coconut water + 2 g/l activated charcoal, M3 =MS + 1 ppm IBA+ 3 ppm BAP + 150 ml/l coconut water + 2 g/l activated charcoal, M4 = MS+ 1 ppm IBA+ 4 ppm BAP + 15 0ml/l coconut water + 2 g/l activated charcoal. Eachtreatment consists of 5 replicates, so there were 25 units experiment, with 3 explants each.Results of this study revealed that M2 media exhibited the best growth, as shown by swellingbuds (23.77 Days After Planting/DAP), earliest buds formation (49.33 DAP) and height ofbuds of 2,12cm.

Studi Pemberian Pupuk Organik dan Tinggi Genangan Air Terhadap Hasil Tanaman Padi Varietas Cigeulis Di Subak Sembung Kota Denpasar I GUSTI NGURAH DJORDI JUNIADA; I PUTU DHARMA; I WAYAN WIRAATMAJA
Agrotrop : Journal on Agriculture Science Vol 7 No 2 (2017)
Publisher : Fakultas Pertanian Universitas Udayana

Study of Organic Fertilizer Providing High and Puddle of Results for Rice Varieties Cigeulis in Subak Sembung Denpasar City. Rice (Oryza sativa L.) is the staple vital food of Indonesian people. National rice production has not been able to meet the needs of the population, despite many efforts such as the use of improved varieties, fertilization, the use of agricultural machinery, and the use of pesticides. This study aimed to determine the effect of water level and organic fertilizers on crop yields of rice. This experiment used randomized block design in a factor groups, namely the combination of the water level and the dose of organic fertilizer. This research using analysis of variance (ANOVA) to determine the effect of treatment of the variables tested. If treatment significantly it will be followed by LSD test 5%. The results showed that the treatment is a combination of water level and organic fertilizers provide a very real effect on the growth and yield of rice (dry grain harvest/ha). Harvest dry grain yield per hectare obtained at the highest AMP2 treatment, namely without flooding water and organic fertilizers and 6 ton / ha at 10,78 ton / ha were significantly higher 33,78 % compared to the treatment of farmers ie 8,07 ton / ha (AGP0), but not significantly different from AMP1. Based on the research results, it can be recommended the application of water-saving cultivation of organic fertilizer with a dose of 4 tons / ha needs to be done to improve rice yields.

Identifikasi dan Karakterisasi Sumber Daya Genetik Tanaman Buah-Buahan Lokal di Kabupaten Tabanan I KETUT ADE SUJANA; I MADE SUKEWIJAYA; I WAYAN WIRAATMAJA
Agrotrop : Journal on Agriculture Science Vol 6 No 2 (2016)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.102 KB)

Identification and Characterization of Genetic Resources of Local Fruits inTabanan. The fruit is a source of vitamins and minerals that ensure the metabolic processesin the human body, some of which can also be used as medicines, cosmetics, SPA (massage)social and culture as a means to use for the material of offerings. Tabanan regency, as well asother areas in Bali has a variety of fruit but the resources still underutilized. This researchaims to identify the type of fruit genetic resources in Tabanan, profile the genetic resourcesregarding the morphology of fruit and agronomic characters, as well as to compile thegeographical spread map and diversity of fruits. Identification and characterization as well asthe distribution map is very important for the conservation, development and utilization ofgenetic resources in Tabanan Regency. The results of the research conducted in Tabanan,found 31 type and 52 subtype local fruit, with 6 different types of eminent fruit, 15 kinds ofrare fruits, 12 kinds of fruit that usually use for upakara and 4 types of fruits that are use asmedicine. Based on the results of the survey conducted in tabanan then it can be possible tocomposed 34 geographical local fruit spread map.

Mengatasi Kegagalan Fruit-Set dengan Pembuangan Bekas Tandan Bunga dan Anakan Pada Salak Gula Pasir (Salacca zalacca var. Gula Pasir) I WAYAN EKA SAPUTRA; I WAYAN WIRAATMAJA; I NYOMAN RAI
Agrotrop : Journal on Agriculture Science Vol 5 No 1 (2015)
Publisher : Fakultas Pertanian Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (83.188 KB)

Overcoming the Failure of Fruit-set by Removing Former Flower Stem and Shoot on Salak Gula Pasir Fruit (Salacca zalacca var. Gula Pasir). This research aimed to overcome the failure of fruit-set by removing former flower bunch and shoot on salak gula pasir (Salacca zalacca var. Gula Pasir). This research was a factorial experiment, designed using randomized completely block design with 2 factors. The first factor was removal of former flower bunch, consisted of 2 levels (removed and not removed), and the second factor was removal of shoot, consisted of 2 levels (removed and not removed). Thereby, there were 4 treatments combination and replicated 7 times so that 28 plants was required. The result of the research showed that the greatest percentage of fruit-set (80,15%) was obtained on the shoot removal treatment, whereas the fruit-set of the treatment on which shoot was not removed was 60,34%. On the removal of former flower bunch treatment, there was no significant difference on removal and not removal treatment between the percentages of fruit-set.

Upaya Meningkatkan Produksi dan Kualitas Buah Jambu Biji Kristal (Psidium guajava L. cv. Kristal) Melalui Pemupukan I GEDE JAYA MAHENDRA; I NYOMAN RAI; I WAYAN WIRAATMAJA
Agrotrop : Journal on Agriculture Science Vol 7 No 1 (2017)
Publisher : Fakultas Pertanian Universitas Udayana

Efforts to Increase Production and Quality of “Kristal” Guava Variety (Psidium guajava L. cv. Kristal) by Fertilization. Nowadays “Kristal” guava variety (Psidium Guajava L. cv. Kristal) is very popular for consumers because it has several advantages such as flesh fruit is crunchy, sweet-sour taste with slightly seeds or seedless, and shelf life of fruit relatively long that can be up to 1 month if stored at temperature of 10-15 oC. The challenge faced by farmers are the production and fruit quality still low, due to inadequate maintenance done. This research was conducted to study the effect of fertilizer to increase the production and quality of “Kristal” guava variety. Research was carried out in farmers garden at Pelaga Village, District of Petang, Badung Regency, Bali, from April-November 2016. The study was a randomized block design (RBD) with fertilizer treatment consisted of 4 levels and each repeated 6 times. The results showed that fertilization increase production and quality of “Kristal” guava fruit compared to the control. The highest weight of fruit per plant (18.28 kg / plant) were obtained on plants fertilized with compost 5kg/plant + urea 200 g/plant + KCl 250 g/plant + TSP 250 g/plant + gypsum 500 g/plant+ micro fertilizer CuSO4 and ZnSO4 1.5 g/plant, respectively, given once at the beginning of the study and significantly different compared to the lowest weight of fruit per plant which obtained on controls (8.99 kg/plant). The highest fruit diameter (8.72 cm) obtained on plants fertilized with compost 5kg/plant + urea 200 g/plant + KCl 250 g /plant + TSP 250 g / plant + gypsum 500 g/plant + micro fertilizer CuSO4 and ZnSO4 each 1.5 g/plant, respectively, given three times i.e at the beginning of the study, at the phase of anthesis, and at the maturity of fruit and significantly different compared to control (7,50 cm).

Co-Authors A. A. P. Sri ADHIATMA DHIYAN SAPUTRA Cokorda Gede Alit Semarajaya Dewa Ayu Ari Febriyanti Faisal Siregar Gede Wijana HESTIN YUSWANTI I GEDE JAYA MAHENDRA I GEDE NADI ARAT I GUSTI ALIT GUNADI I Gusti Ayu Kadek Dian Permatha Suyoga I Gusti Ayu Kadek Dian Permatha Suyoga I GUSTI NGURAH DJORDI JUNIADA I Gusti Ngurah Widyatmaja I KADEK AGUS INDRAWAN I KETUT ADE SUJANA I Ketut Suada I Made Sudana I Made Sukewijaya I N Rai I N. Rai I Nengah Rai I NYOMAN GEDE ASTAWA I NYOMAN RAI I P. Sudana I Putu Adhi Wiriyanatha I PUTU DHARMA I PUTU EKO SURYA ARIANTA I PUTU SUDANA I WAYAN EKA SAPUTRA I. N. Rai I. P. Sudama I.G.K. Dana Arsana I.N. Rai I.P. Sudana IGK Dana Arsana IN RAI ING ASTAWA M. Praborini Melani Jelita Tarigan N K A Astiari NADA SAHARA Ngurah Gede Astawa Ni K. Alit Astiari Ni Kadek Trisnayanti Ni Kadek Trisnayati Ni Ketut Arismayanti, Ni Ketut Ni Komang Alit Astiari Ni Komang Alit Astiari, Ni Komang Alit Ni Luh Kartini NI MADE KESUMA DEWI NI NYOMAN ARI MAYADEWI NI NYOMAN DEVIANITRI NI WAYAN PENI YULIAWATI NK Alit Astiari, NK Alit Rai I. N SALSABILA FAADHILAH UTAMI UTAMI Yohanes Setiyo

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