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Uji Efektivitas Pupuk Majemuk NPK yang Ditambah Asam Humat terhadap Pertumbuhan dan Produksi Tanaman Padi TITA RUSTIATI
Agrotrop : Journal on Agriculture Science Vol 3 No 2 (2013)
Publisher : Fakultas Pertanian Universitas Udayana

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Study on The Effectivityof NPK Compound FertilizerAdded withHumic Acid for Growthand Pruductionof Rice.It is important to improve the efficiency of fertilizers especially nitrogen (N)for lowland rice cultivation, since the efficiencyof broadcasted N was ony in the range of 30–40%,while P fertilizer 20–30% and K fertilizer 30–40%. Humic products have been used for years inproduction agriculture with varying results to improve plant growth and yield, as well as increasingfertilizer efficiency.Field experiment has been conducted at Experimental Farm of Rice Research InstituteinSukamandi to evaluate the effectivity of humic acid addition to NPK compound fertilizer on lowlandrice. Five doses (200, 250, 300, 350, and 400 kg/ha) of compound fertilizers NPK-1 and NPK-2(NPK+humic acid), together with control and local recomended fertilizer were tested in this experiment.Twelve treatments with 4 replications were arranged in Completely Randomized Block Design.Resultsof experiment showed that in general compound NPK fertilizer did not give better result if humic acidwas added; the effectivity of NPK compound fertilizer was not affected by the addition of humic acid.Humic acid tended to increase N use efficiency at higher level of fertilizer. It was suggested that withhigher level of humic acid theeffect would be more significant.

POTENSITRICHODERMA SP. DANGLIOCLADIUM SP. SEBAGAI MIKROBA ANTAGONIS TERHADAPFUSARIUM OXYSPORUM F.SP.CUBENSE I MADE SUDARMA
Agrotrop : Journal on Agriculture Science Vol 1 No 1 (2011)
Publisher : Fakultas Pertanian Universitas Udayana

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Potency of Trichoderma sp. and Gliocladium sp. as microbial antagonist on Fusarium oxysporum f.sp. cubense A total of 115 different fungus isolate were recovered from banana crop habitats with and without Fusarium wilt disease symptom. These were than assessed for their antagonist ability againstFusarium oxysporum f.sp.cubense (Foc)in vitro.The soil samples were collected from three regencies in Bali, i.e. Karangasem, Klungkung and Jembrana which are the main banana growing areas in Bali. Soil sampling was done in two sites in each regency representing the banana habitat with and without Fusarium wilt symptom, by collecting 100 grams of soil surrounding the banana plant at the depth of 20 cm. The isolate was macroscopically identified to know the color of colony and the growth rate, and microscopically to observe the shape of hypae, the shape of spore, and sporangiospore. The research was done on August until December 2009. Results indicated that one isolates ofGliocladium sp. and 22 isolates of Trichoderma sp. active against Foc. Trichoderma sp. was able to inhibit the Foc mycelium growth were 78.89 ± 1.11- 95.83 ± 7.22 % and Gliocladium sp. inhibited until 95.83 ± 7.22%. After tested with the Foc isolated from four banana cultivars in Bali (Saba, Ketip, Susu and Raja), all of the isolates was able to inhibit the Focin vitro.

Peningkatan Produksi Tanaman Bawang Daun (Allium Fistusolum) Melalui Aplikasi Pupuk Organik Cair Rumput Laut (Sargassum sp.) di Kota Wisata Batu KADEK LENI; MOCH. FADIL; ACHMAD NIZAR
Agrotrop : Journal on Agriculture Science Vol 9 No 2 (2019)
Publisher : Fakultas Pertanian Universitas Udayana

The Effect of Providing Seaweed Liquid Organic Fertilizer (Sargassum sp) on The Growth and Production of Leaf Onion (Allium Fistusolum). Market demand for leaf onion has increased from year to year but the growth and production of leaf onion has not increased because the farmers always fertilize using chemical fertilizers. This study aims to determine the effect of seaweed liquid organic fertilizer on the growth and production of leaf onions. The study was conducted on a land area of 30m2 in Tulungrejo Village, Bumiaji, Batu - Malang. The experiment used CRD (Completely Randomized Design) with 5 treatments and 5 replications. The treatment carried out were without giving of seaweed liquid organic fertilizer on the leaves onion plant (P0), giving seaweed liquid organic fertilizer to the leaves onion plant with a concentration of 5 ml / liter (P1), 10 ml / liter (P2), 15 ml / liter (P3), and 20 ml / liter (P4). The parameters observed were plant height growth, growth in number of leaves and weight of harvesting leaf onion. Observation data were analyzed using analysis of variance level 5% and Duncan's advanced test at 5% level. The results showed that the application of seaweed liquid organic fertilizer had a significant effect on the growth of leaf onion plants and the production of onion leaf. On the growth of the number of leaves, the application of seaweed liquid organic fertilizer did not have a significantly effect on the leaf onion plants in the age of 63 days after planting.

Identifikasi dan Karakterisasi Tanaman Pewarna Alam Tenun Pegringsingan Desa Tenganan IDA AYU PUTRI DARMAWATI; GEDE WIJANA; A.A. MADE ASTININGSIH; IDA AYU MAYUN; NI LUH MADE PRADNYAWATHI
Agrotrop : Journal on Agriculture Science Vol 6 No 1 (2016)
Publisher : Fakultas Pertanian Universitas Udayana

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The Characterization and Identification of Plant Natural Dye Tenun PegringsinganTenganan Village. The aim of the research was to know the dyeing process and the kind ofplant dyes are used in the manufacture of dye Pegringsingan in the village of Tenganan andthe plant characterize morphological and agronomic. The method used in this study wasexplorative and survey method. Implementation of the study consisted of three phases ofactivities, namely (1) the collection of secondary data, (2) surveys various plants natural dyeused for tenun pegringsingan and distribution, and (3) the identification of morphological andagronomic characters. The results showed there were four plant dyes for tenun pegringsingani.e sunti or noni (Morinda citrifolia) as a red dye, walnut (Aleurites moluccana (L.) Willd ) asa yellow dye, kepundung white or red (Baccaurea racemosa Var. white, Baccaurea racemosaVar. red), taum (Indigofera sp) producing a blue color.

Pengaruh Media Tanam dan Pemupukan terhadap Pertumbuhan Bibit Jambu Biji (Psidium guajava L.) untuk Batang Bawah I KADEK EKADANA; I NYOMAN RAI; GEDE WIJANA
Agrotrop : Journal on Agriculture Science Vol 7 No 2 (2017)
Publisher : Fakultas Pertanian Universitas Udayana

Effects of Plant Media and Fertilization on The Growth of Guava Seed (Psidium Guajava L.) for The Under Stem. The availability of the rootstock with good growth very important in the Propagation of guava. Improvement of the factors that affect the growth of guava seedlings for rootstock needs to be done to spur its growth. The alternative that can be done is to improve vegetative growth by choosing the right planting medium and good fertilization. The research was conducted on farmers farm located in Banjar Tiyigan, Pelaga Village, Petang, Badung, Bali. The study used factorial randomized complete block design (RCBD). The first factor planting media consists of 4 levels i.e soil+sand, soil+sand+compost, soil+sand+rice husk and soil+sand+compost+rice husk. The second factor fertilization consisting of 3 levels i.e chemical fertilizer (NPK), liquid organic fertilizer (biourine) and NPK+biourine fertilizer, which were repeated 4 times. The results showed that there was no interaction between treatment of planting medium and fertilization. The treatment of planting media had significant effect on all observed variables, except for N and P leaf content. The treatment of fertilizer has a significant effect to the variation of leaf area, leaf plant and plant height. The best planting medium was found on mixed soil+sand+compost+rice husk with total dry weight of oven per plant 11.65 g very different from other media. Meanwhile for the treatment of NPK fertilizer added with biourine fertilizer gave the plant height of 29.04 cm is very different with other fertilizers.

Ragam Kultivar Kopi di Lampung RUSDI EVIZAL; SUGIATNO SUGIATNO; FEMBRIARTI ERRY PRASMATIWI
Agrotrop : Journal on Agriculture Science Vol 5 No 1 (2015)
Publisher : Fakultas Pertanian Universitas Udayana

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Variability of Coffee Cultivars in Lampung. Province of Lampung is production region of Robusta coffee in Indonesia. Farmer plant seedling of progeny resulted in high variability of coffee bean production. High yield clones then were used as grafting material to improve coffee production. The research aimed to study variability of coffee cultivars in Lampung and factors affecting its production. Respondent farmers and coffee fields to be surveyed were determined by purposive sampling method from 3 district of West Lampung, Tanggamus, and North Lampung. Three sub-districts were taken from each district to choose a farmers group. The results showed that there were 27 cultivars found in location including 25 cultivars were Robusta coffee and the rest were Arabica and Liberica. In each district, the compositions of dominant cultivars were different. Farmers were able to describe the cultivars based on characteristics of fruits and beans, leaves, shoots, and branches. Some cultivars come from other province of outside Lampung. Dominance indices and richness of cultivars together with elevation level of coffee field had significant negative effects on coffee productivity, while fertilize doses had positive effects.

Kesesuaian Kualitas Air Irigasi untuk Padi Sawah di Daerah Irigasi Mambal I GUSTI NGURAH SANTOSA; I PUTU DHARMA
Agrotrop : Journal on Agriculture Science Vol 9 No 1 (2019)
Publisher : Fakultas Pertanian Universitas Udayana

Suitability of Irrigation Water Quality for Rice in Mambal Irrigation Area. Mambal irrigation area is located in southern region of Bali, close by urban area. It consists of 42 Subak which covered 4.820 ha. However, the total area that still exists today is only 2.978 ha, and it is considered potential in increasing rice production and supplying rice in order to support food self-sufficiency in Bali. The increase of population is considered as the factor of wetland conversion because, the growth of population leads to variety of purposes such as shelter (housing), tourism/hotel, accommodation, business/home industry, livestock, public facilities, etc. Therefore, the activities done on the wetland conversion area automatically changed. That activity on conversion area consequences in both liquid or solid waste, and it is often discharged into rivers or irrigation channels. Consequently, it may cause irrigation water pollution. Poor quality of irrigation water can endangering rice plant growth and reduce the production, which means blocking or inhibiting food self-sufficiency. This study is considered as field and laboratory research. There are some field activities done, namely observation of the pollution sources and types of pollutants, as well as waste disposal mechanisms and technologies used to tackle pollution. In order to determine the quality of irrigation water, the water samples taken in the primary channel (1 water sample), secondary channel (1 water sample), tertiary channel (1 water sample), and field area (3 samples of water). All water samples are analyzed at the Analytical Laboratory of Udayana University. The results of the study are the sources of pollution come from channel natural environments, public facilities, housing and household waste. It was found that there are some types of waste, namely natural garbage, artificial garbage, liquid or solid waste in small amount. The mechanism of waste disposal is done conventionally and there is no application of technology of waste disposal. The outcome of the study is irrigation water quality for rice is still suitable for irrigation.

Potensi Hasil Varietas Unggul Baru Padi Gogo Pada Lahan Kering Menunjang Peningkatan Produksi Beras Nasional di Kabupaten Garut ENDJANG SUJITNO; KURNIA KURNIA
Agrotrop : Journal on Agriculture Science Vol 4 No 2 (2014)
Publisher : Fakultas Pertanian Universitas Udayana

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The Yield Potential of Superior Variety of ‘Gogo’ Paddy on The Dry Land in Garut Regency to Support an increase of Domestic Rice Production. Garut regency has the potential dry land with an area of 34.043 ha planting or 15.42% of the acreage of upland rice in West Java. Development of upland rice, especially in dry land can provide a significant contribution to the improvement of the national rice production if managed properly. However, most of dryland farmers, still use a local varieties in upland rice cultivation, so that the production is still low. The use of new varieties of upland rice as a potential solution to solve the problems. To view the suitability of some new high yielding rice varieties in Garut Regency, has implemented a review of some new varieties of upland rice include Situ Patenggang, Inpago 5, Towuti, and Situ Bagendit. The research method used was a randomized block design with 4 treatments and 7 replications. The study was conducted in 2010-2011 on dry season from December 2010 until March 2011. The results showed that all varieties has the potential to be developed in Garut regency. The productivity showed of each variety were Situ Patenggang 3.83 t/ha, Inpago 5 3.72 t/ha, Situ Bagendit 3.08 t/ha and Towuti 3.01 t/ha. The farming analysis showed that the R/C value of each variety were Situ Patenggang 2.35, Inpago 5 2.28, Situ Bagendit 1.89, and Towuti 1.85.

Induksi Kalus dengan 2,4-Dpada Mikropropagasi Tanaman Stroberi (Fragraria x ananassa Duch cv. Rosalinda) I.A. PUTRI DARMAWATI; RINDANG DWIYANI; HESTIN YUSWANTI
Agrotrop : Journal on Agriculture Science Vol 3 No 2 (2013)
Publisher : Fakultas Pertanian Universitas Udayana

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Callus Induction with Aplication of 2,4-D in Micropropagation of Strowberry(Fragraria xananassaDuch cv. Rosalinda). Strawberryis grown and well planted in many countries and has ahigh economic value. In Bali,thecentraproduction is in Pancasari Village,Sukasada District,BulelengRegency. The limited number and quality of seedling are the problems currently faced bystrawberry farmers at Pancasari Village. Seedlings produced by conventional propagation are limitedand are not able to meet the needs of seedling available for planting area. This study offers a solution tothe problem by applyingmicropropagationtechnique through callus induction. The research aim is tofind the optimal concentration of 2,4 - D to induce callus of strowberry. Callus that forms will be usedas the material for the next growing into young plants regenerated seedlings. This experiment used acompletely randomized design with 2 factors. The first factor was theconcentrations of 2,4 - D withfive levels of treatments, i.e.0 ; 0.5, 1.0, 1.5, and 2.0 ppm and the second factor was type of explantsused, including tip , middle and base of leaf. Results showed that2,4-D concentration of 1 and 2 ppmapplied on the base of the leaf is able to induce 100 % callus at 14 days after planting. Callus formedwas greenish white. The callus will be regeneratedinto plantlets or young plants.

Cardinal Temperatures of Brassica sp. and How to Determine It D. K. SUANDA SUANDA
Agrotrop : Journal on Agriculture Science Vol 2 No 1 (2012)
Publisher : Fakultas Pertanian Universitas Udayana

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Cardinal temperatures consist of minimum, optimum and maximum of plant growth, and might beable to be determined by assessing effect of temperature on seed germination. An experiment ofseed germination was conducted in laboratory, using thermal gradient plate for ten days. To test hypothesisthat rapeseed genotypes vary in their response to temperatures. The design of this experiment was asplit plot with four replications. The main-treatments were 14 different temperatures: 0.4°C, 3.3°C,7.8°C, 11.6°C, 13.3°C, 15.0°C, 16.8°C, 18.3°C, 20.9°C, 21.1°C, 25.6°C, 29.0°C, 33.0°C and36.3°C. Sub-treatments were 6 brassica genotypes: Brassica napus genotypes (Tatyoon and Marnoo);B. campestris (Jumbuck and Chinoli B); B. juncea (No. 81797 and Zero Erusic Mustard (ZEM) 2).Each treatment was using 50 seeds. Germinations were observed daily for ten days and data wereanalyzed with regression and correlation. Genotypes responded differently to temperatures with Jumbuckthe most sensitive to low temperature with minimum temperature (7.90°C), then respectively followedby Chinoli B (6.36°C), ZEM 2 (4.77°C), Tatyoon (4.63°C), No. 81797 (2.59°C), and Marnoo(1.00°C). For high temperature the most sensitive was No. 81797 with maximum temperature 38.61°C.and then respectively followed by Marnoo (39.76°C), Chinoli B (42.93°C), Tatyoon (43.79°C),Jumbuck (44.58°C) and ZEM 2 (45.88°C). Optimum temperatures were for Jumbuck was 24.56°C,ZEM 2 (26.95°C), Tatyoon (27.12°C), No. 81797 (28.12°C), Chinoli B (29.74°C) and Marnoo(30.48°C).

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Journal Mail Official
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Kota denpasar,

Bali

INDONESIA