Jurnal Informatika Pertanian : Volume 22 No. 1, 2013

ISSN 0852-1743
Terakreditasi dengan Predikat C
Sertifikat No. 383/AU1/P2MBI/07/2011
(SK Kepala LIPI No. 629/D/2011)
Diterbitkan dua kali setiap tahun oleh :
Sekretariat Badan Litbang Pertanian
Badan Penelitian dan Pengembangan Pertanian

Penanggung Jawab :

Dewan Redaksi :

Ketua :
Dr. Ir. L. Hardi Prasetyo, M.Agr. (Genetika Kuantitatif/Statistika)

Wakil Ketua :

Dr. Ir. Rohlini, M.S. (Manajemen Sumberdaya Pertanian)

Anggota :

Prof.(Riset) Dr. Elna Karmawati, MS. (Entomologi/Statistika)
Prof.(Riset)Dr. Kedi Suradisastra, M.Sc. (Sosiologi dan Kelembagaan Pertanian)
Prof.(Riset) Dr. Ir. Subandriyo, M.Sc. (Pemuliaan dan Genetika Ternak)
Drs. Bambang Sankarto, M.I.M. (Teknologi Informasi)
Dr. Ir. Muhamad Sabran, M.Sc. (Produksi Tanaman/Statistika)
Ir. Erlita Adriani, MBA.  (Sistem Informasi)
Dra. Siti Nurjayanti, M.Sc. (Teknologi Informasi)

Mitra Bestari :

Prof. Dr. Ir. Le. Istiqlal Amien, M.Sc. (Agroklimat dan Pencemaran Lingkungan)
Prof. Dr. Ir. Ridwan Thahir. (Teknologi Pasca Panen)
Prof. Dr. Ir. Budi Haryanto, M.Sc. (Pakan dan Nutrisi Ternak)
Prof. Dr. Ir. Asep Saefuddin, M.Sc. (Statistika)
Dr. Ir. Hari Wijayanto, M.Si. (Statistika)
Dr. Ir. Bambang Sayaka, M.Sc. (Ekonomi Pertanian)

Redaksi Pelaksana :

Mohamad Maulana, A.Md.
Wasiyah Utami, A.Md.

  • Penerapan Metode Regresi Logistik dalam Menganalisis Adopsi Teknologi Pertanian

Rachmat Hendayana
Balai Besar Pengkajian dan Pengembangan Teknologi Pertanian, Bogor E-mail : rhendayana@gmail.com

Logistic regression (Logit) is a statistical analysis method of relationship the categorical response variable with one or more explanatory variables. The paper aims to elaborate the logit regression models to analyze the agricultural
technology adoption, cases on HYV of rice adoption. Data source based on survey of 155 farmer respondents selected at swampy wetlands in HSU district of South Kalimantan Province, in 2009. Designed model include adoption element as a response variable, associated with the 13 of explanatory variables. Model application with maximum likelihood uses Minitab version 16, resulted: (1) Application of Logistic Regression with the expected value of maximum likelihood using Minitab can be recommended to analyze the adoption of agricultural technology adoption in the case on HYV of rice. This was supported by the fact that the analysis results shown by the high significance of the model, the effective partial test results, interpretation of results through the odds ratios, and the display size of the association between the response variable with the explanatory variables show a strong relationship and also indicates the good predictive power of the model as shown by the small size of the Concordant and discordant values and Ties (2) the key factor to get the results of Logistic Regression a good guess, is the size of a representative number of respondents with a relatively high diversity. Therefore, validation of data becomes a crucial factor and performed before data analysis.

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  • Penerapan Metode Analytic Hierarchy Proses untuk Merumuskan Strategi Penguatan Kinerja Sistem Agribisnis Cabai Merah di Kabupaten Temanggung

Renie Oelcviani
Balai Pengkajian Teknologi Pertanian Provinsi Jawa Tengan
E-mail : re.oelvani@gmail.com

The good agribusiness performance is determined by a simultaneous and harmonious development in the upstream agribusiness subsector, the primary agricultural subsector, the downstream agribusiness sector, and the supportingservice subsector. This reseach is aimed to design strategy to strengthen the performance of red cayenne agribusiness in Temanggung Regency. The locus was determined purposively in Bulu and Tlogomulyo Districts, Temanggung Regency. This research was done in December 2010 by focused-group discussion (FGD) and interview, with 15 keypersons. The data is analized using quantitative-descriptive method and the analytic hierarchy process (AHP). The results of AHP showed that there are three main priorities should be done as strategies to strengthen the performance of red cayenne agribusiness in Temanggung Regency i.e. the provision of the source of capital for red cayenne farming, the mentoring of the application of a proper cultivation technology to the farmers, and the provision of agro-market facilities by the government to accomodate the yields of holticultural cultivation in Temanggung Regency.

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  • Pemanfaatan Analisis Regresi dan AMMI untuk Evaluasi Stabilitas Hasil Genotipe Padi dan Pengaruh Interaksi Genetik dan Lingkungan

Yuni Widyastuti, Satoto, dan I.A. Rumanti
Balai Besar Penelitian Tanaman Padi, Sukamandi
E-mail : yoeni_11@yahoo.co.id

Some statistical analyses were employed to depict responses of genotype (G) on environment (E). Regression analysis reflects the average index of G x E to calculate the genotype responses to heterogenous environment. Regression deviation was employed to count the stability of the result obtained through such a method, which, further be developed to test the average effect of G x E through a combination of additive effects of multivariate analysis with multiplication effect on the primary component (AMMI model). Regression analysis showed that Ciherang, Hibrindo R1, IH806 hybrid was more superior than others in terms of stability and product adaptability, whereas IH805, IH808, and IH809, are specific for locations Batang, Jember, Ngawi, and Madiun, respectively.

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  • Analisis Korelasi dan Regresi Dinamika Populasi Hama dan Musuh Alami pada Beberapa Varietas Unggul Padi Setelah Penerapan PHT di Kabupaten Bone Provinsi Sulawesi Selatan

 Asriyanti Ilyas dan Fadjry Djufry
Balai Pengkajian Teknologi Pertanian Sulawesi Selatan, Jl. Perintis Kemerdekaan Km. 17,5 Sudiang – Makassar 90242
E-mail : ilyas_m4@yahoo.com

Different types of rice pests, have been reported. The explosions and a potential pests are Rice Stem Borer (Tryporiza sp.), Brown Planthoppers (Nilaparvata lugens), Green Leafhoppers (Nephotettix virescens), and Rats (Rattus sp.), wich an obstacle in creating stability of rice production in Bone. In rice ecosystem, natural enemies of arthropod predators are most instrumental in suppressing the pest population. Fluctuation in population density of natural enemies, affecting pests presence. Efforts to suppress pest proportions through IPM, is a strategy of lowering the level of pests and damage to rice crops. This study aims to identify and measure the relationship strength between pests and natural enemies populations in some rice varieties after IPM, using correlation and regression analysis. Observations conducted in Bone, from May to August 2012, with 2 observed variables, pests and natural enemies populations in Inpari 6, Inpari 10, Inpari 16, Ciherang, Cigelis, and Mekongga. Data analysis were performed using correlation and regression analysis. The results showed a high degree of correlation between pest and natural enemies (predators) populalions, characterized by a positive correlation coefficient (0.957) and significant at the level of 0.01, where each increase in the intensity of pest populations, will be followed by increase in the number of natural enemies captured.

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  • Karakterisasi Aroma dan Rasa Beberapa Varietas Beras Lokal Melalui Quantitative Descriptive Analysis Method

Ami Teja Rakhmi, S. Dewi Indrasari, dan Dody D. Handoko
Balai Besar Tanaman Padi, Sukamandi
Jl. Raya IX Sukamandi, Subang 41256
E-mail : ami_tejarakhmi@yahoo.com

Improvement of the national rice production could be done by using superior variety (VUB), which has early age of maturity and high productivity. However, the farmers, until now, still fanatics to grow the local rice. The utilization of local varieties as genetic resources for producing new superior varieties is expected to be solution. The study used seven local rice varieties (Anak Daro, Si Buyung, Cicih Merah, Mentik Wangi, Bengawan Solo, Rojolele, and Mandoti), to test the aroma and taste. Quantitative Descriptive Analysis (QDA) using trained panelists was applied. Data obtained were analyzed by Multivariate Analysis of Principle Component Analysis technique. Results showed that Mandoti and Rojolele have similar aroma and characterized by pandan, cereals, buttery, and green aroma. Cicih Merah characterized by creamy and sweet aroma. Mentik Wangi, Bengawan solo, and Anak Daro have similar properties but are not characterized by a distinctive aroma. Flavors of Cicih Merah and Bengawan solo are in one group and characterized by a taste of sweet and umami. Mandoti are in different groups and characterized by a taste of salty and bitter. Mentik Wangi and Si Buyung, Anak Daro and Rojolele even be in one group but not characterized by a distinctive flavor attributes.

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  • Pengaruh Pemberian Kulit Kopi Terfermentasi dan Leguminosa untuk Pertumbuhan Kambing Peranakan Etawah

I Made Londra dan Putu Sutami
Balai Pengkajian Teknologi Pertanian Provinsi Bali,
Jl. By Pass Ngurah Rai Pesanggaran, Denpasar, Bali
E-mail: londra_bptp@yahoo.co.id

Waste coffee planthas the potential to be used as abooster feed for livestock. Coffee fruit waste composition physically quite largeat around 48% on coffee pulp. Research was conducted to examine the effect on the growth of Etawah Crossbred Goat (PE) after the treatment of fermented coffee waste as the substitution for leguminous (gamal and kaliandra). Twelve 5-6 months old male PE goats were involved with 20 kg early weight average. Three groups of feeding treatment were considered: Treatment P1 = 100% leguminous (gamal and kaliandra in ratio 1:1); Treatment P2 = 70% leguminous (gamal and kaliandra in ratio 1:1) + 30% fermented coffee Pulp; Treatment P3 = 40% leguminous (gamal and kaliandra in ratio 1:1) + 60% fermented coffee Pulp. Result of research indicated that the average increase of daily body weight of PE goat in the Treatment P1 (88.93 grams/goat/day) and P2 (100.00 grams/goat/day) was not obviously different (P > 0.05), but both were obviously different (P < 0.05) from P3 (71.79 grams/goat/day). Treatment P3 showed the lowest level of the consumption of DM, OM and the lowest level of gross energy, and had obvious difference (P < 0.05) from P1 and P2. Meanwhile, P1 and P2 were not obviously different (P > 0.05). From these results, it was concluded that the treatment of fermented coffee Pulp by 30 % and of leguminous (gamal and kaliandra) by 70 % (at P2) were giving the best growth for PE goat. Indeed, P2 also displayed the most efficient food conversion.

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  • Model Simulasi Perkembangan, Pertumbuham dan Neraca Air Tanaman Kentang pada Dataran Tinggi di Indonesia 

Salwati, Handoko, Irsal Las, dan Hidayati R
Balai Pengkajian Teknologi Pertanian Provinsi Jambi,
Jl. Samarinda Paal V Kotabaru, 36128 Jambi
E-mail: salwatijbi@yahoo.com

This research aims to construct a simulation model of development, growth and waterbalance of potato crop. Reasearch also predicts climate change impact on potato productivity in several potato production center in Indonesia. The crop model being constructed explains process mechanism of development and growth during crop life cycle as a response to fluctuation of climatic. Three field experiments were conducted at three locations at Pacet and Galudra in West Java Province, and at Kerinci in Jambi Province, to support the model development; for model calibration (Pacet) and model validation (Galudra and Kerinci). Paired t-test between model predictions of Granola variety with observations showed that there were not significant differences (P> 0,05) on all variables tested, except leaf biomass. In Atlantic variety, there were not significant differences (P> 0,05) on root, tuber biomass and soil water content. Based on graphical test showed coefficient of determination were (R2) greater than 0,80 for all variables.Generally, results on validation suggested that model predictions were not significantly different with field measurements at Galudra (Granola variety) and Kerinci (Atlantis and Granola variety) for variable of plant ages, biomass of root, stem, leaf and tuber, leaf area index, and soil water content.

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