Pub Date : 2022-06-24DOI: 10.1590/1678-992x-2021-0229
Daniel Althoff, L. Rodrigues
: Evapotranspiration (ET) is a key component of the hydrological cycle. Therefore, adequately estimating it is crucial to improving water resource planning and management. One of the most affordable methods of estimating ET is first to estimate reference crop evapotranspiration (ETo) and later associate it to crop and soil coefficients. The FAO Kc-ETo approach can be used only when ETo is computed with the FAO Penman-Monteith equation. However, low data availability may restict the equations used to estimate ETo. In this study, we assess and calibrate common methods used to estimate ETo under such conditions of limited data availability. Based on the annual calibration, the Makkink (NSE = 0.85) outperformed the Priestley-Taylor (NSE = 0.73), Hargreaves-Samani (NSE = 0.56), and Penman-Monteith temperature approach (NSE = 0.58). The seasonal calibration of parameters showed no significant improvement to the methods assessed ( Δ NSE ≤ 0.01), except for the Priestley-Taylor ( Δ NSE = 0.06). The performance of temperature-based equations was particularly limited due to the performance of the equation adopted to estimate global solar radiation. Thus, improving the representation of global solar radiation for limited data availability can also play a key role in improving ETo prediction.
{"title":"Improvement of reference crop evapotranspiration estimates using limited data for the Brazilian Cerrado","authors":"Daniel Althoff, L. Rodrigues","doi":"10.1590/1678-992x-2021-0229","DOIUrl":"https://doi.org/10.1590/1678-992x-2021-0229","url":null,"abstract":": Evapotranspiration (ET) is a key component of the hydrological cycle. Therefore, adequately estimating it is crucial to improving water resource planning and management. One of the most affordable methods of estimating ET is first to estimate reference crop evapotranspiration (ETo) and later associate it to crop and soil coefficients. The FAO Kc-ETo approach can be used only when ETo is computed with the FAO Penman-Monteith equation. However, low data availability may restict the equations used to estimate ETo. In this study, we assess and calibrate common methods used to estimate ETo under such conditions of limited data availability. Based on the annual calibration, the Makkink (NSE = 0.85) outperformed the Priestley-Taylor (NSE = 0.73), Hargreaves-Samani (NSE = 0.56), and Penman-Monteith temperature approach (NSE = 0.58). The seasonal calibration of parameters showed no significant improvement to the methods assessed ( Δ NSE ≤ 0.01), except for the Priestley-Taylor ( Δ NSE = 0.06). The performance of temperature-based equations was particularly limited due to the performance of the equation adopted to estimate global solar radiation. Thus, improving the representation of global solar radiation for limited data availability can also play a key role in improving ETo prediction.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"1 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67589131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-24DOI: 10.1590/1678-992x-2021-0190
M. Nardino, F. F. Silva, Tiago Olivoto, W. S. Barros, Chainheny Gomes de Carvalho, Victor Silva Signorini, H. Mezzomo, C. R. Casagrande
: A large set of variables is assessed for progeny selection in a plant-breeding program and other agronomic fields. The meta-analysis of the coefficient of variation (CVe) produces information for researchers and breeders on the experimental quality of trials. This analysis can also be applied in the decision-making process of the experimental plan regarding the experimental design, the number of repetitions, and the treatments and plants/progenies to be measured. In this study, we evaluated the dataset distribution and the descriptive statistics of CVe through the Frequentist and Bayesian approaches, aiming to establish the credibility and confidence intervals. We submitted CVe data of ten wheat ( Triticum aestivum L.) traits reported in 1,068 articles published to the Bayesian and Frequentist analyses. Sample data were analyzed via Gamma and normal models. We selected the model with the lowest Akaike Information Criterion (AIC) value, and then we tested three link functions. In the Bayesian analysis, uniform distributions were used as non-informative priors for the Gamma distribution parameters with three ranges of q ~ U ( a , b ). Thus, the prior probability density function was given by: p ( )
在植物育种计划和其他农艺领域中，对后代选择进行了大量的变量评估。变异系数(CVe)的荟萃分析为研究人员和育种人员提供了有关试验质量的信息。这种分析也可以应用于实验计划的决策过程中，包括实验设计、重复次数、处理和要测量的植物/后代。在本研究中，我们通过Frequentist和Bayesian方法对CVe的数据集分布和描述性统计进行评估，旨在建立可信度和置信区间。将1068篇小麦(Triticum aestivum L.)性状的CVe数据进行贝叶斯和频率分析。样本数据通过Gamma和正态模型进行分析。选取AIC值最小的模型，对三个链接函数进行检验。在贝叶斯分析中，均匀分布作为Gamma分布参数的非信息先验，分布范围为q ~ U (a, b)。则先验概率密度函数为:p ()
{"title":"Meta-analysis of the experimental coefficient of variation in wheat using the Bayesian and Frequentist approaches","authors":"M. Nardino, F. F. Silva, Tiago Olivoto, W. S. Barros, Chainheny Gomes de Carvalho, Victor Silva Signorini, H. Mezzomo, C. R. Casagrande","doi":"10.1590/1678-992x-2021-0190","DOIUrl":"https://doi.org/10.1590/1678-992x-2021-0190","url":null,"abstract":": A large set of variables is assessed for progeny selection in a plant-breeding program and other agronomic fields. The meta-analysis of the coefficient of variation (CVe) produces information for researchers and breeders on the experimental quality of trials. This analysis can also be applied in the decision-making process of the experimental plan regarding the experimental design, the number of repetitions, and the treatments and plants/progenies to be measured. In this study, we evaluated the dataset distribution and the descriptive statistics of CVe through the Frequentist and Bayesian approaches, aiming to establish the credibility and confidence intervals. We submitted CVe data of ten wheat ( Triticum aestivum L.) traits reported in 1,068 articles published to the Bayesian and Frequentist analyses. Sample data were analyzed via Gamma and normal models. We selected the model with the lowest Akaike Information Criterion (AIC) value, and then we tested three link functions. In the Bayesian analysis, uniform distributions were used as non-informative priors for the Gamma distribution parameters with three ranges of q ~ U ( a , b ). Thus, the prior probability density function was given by: p ( )","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"1 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67588497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-24DOI: 10.1590/1678-992x-2021-0258
T. F. Diana, A. A. Calderano, H. Rostagno, Maria Rita de Lima Marques, F. Tavernari, R. Veroneze, L. Albino
: Apparent calcium (Ca) retention and digestibility coefficients are affected by limestone particle size in the diet of laying hens. This study aimed to determine the apparent retention and digestibility coefficients of Ca in limestone of different particle sizes in laying hens. The study comprised 288 Lohmann Brown laying hens (50 weeks of age; 1,964 ± 98 g) distributed in a completely randomized experimental design with a 3 × 2 factorial arrangement [three Ca concentrations (10, 20, and 30 g kg –1 ) × two limestone particle sizes (480 and 1,978 µm)] with eight repetitions per treatment and six birds per experimental unit. The experiment included five days for adaptation and five days for total excreta collection. All birds were slaughtered at the end of the ten days to collect the ileal contents. The total or ileal Ca content was plotted against the Ca of diets concentration using linear regression analysis. The regression line slope represented the apparent retention (CaR) and digestibility coefficients of Ca (CaD) in limestone. There was interaction between Ca concentration in the diet and limestone granulometry on CaD ( p = 0.001) and CaR ( p < 0.001). The CaD and CaR of fine-and coarse-grained limestone increased linearly with increasing Ca concentrations in the diet. The apparent digestibility coefficients estimated for laying hens fed with fine-grained and coarse-grained limestone were 0.72 and 0.35, respectively. The apparent retention coefficients estimated for laying hens fed fine-grained and coarse-grained limestone were 0.96 and 0.47, respectively.
{"title":"Apparent calcium retention and digestibility coefficients of limestone with different particle sizes in laying hens","authors":"T. F. Diana, A. A. Calderano, H. Rostagno, Maria Rita de Lima Marques, F. Tavernari, R. Veroneze, L. Albino","doi":"10.1590/1678-992x-2021-0258","DOIUrl":"https://doi.org/10.1590/1678-992x-2021-0258","url":null,"abstract":": Apparent calcium (Ca) retention and digestibility coefficients are affected by limestone particle size in the diet of laying hens. This study aimed to determine the apparent retention and digestibility coefficients of Ca in limestone of different particle sizes in laying hens. The study comprised 288 Lohmann Brown laying hens (50 weeks of age; 1,964 ± 98 g) distributed in a completely randomized experimental design with a 3 × 2 factorial arrangement [three Ca concentrations (10, 20, and 30 g kg –1 ) × two limestone particle sizes (480 and 1,978 µm)] with eight repetitions per treatment and six birds per experimental unit. The experiment included five days for adaptation and five days for total excreta collection. All birds were slaughtered at the end of the ten days to collect the ileal contents. The total or ileal Ca content was plotted against the Ca of diets concentration using linear regression analysis. The regression line slope represented the apparent retention (CaR) and digestibility coefficients of Ca (CaD) in limestone. There was interaction between Ca concentration in the diet and limestone granulometry on CaD ( p = 0.001) and CaR ( p < 0.001). The CaD and CaR of fine-and coarse-grained limestone increased linearly with increasing Ca concentrations in the diet. The apparent digestibility coefficients estimated for laying hens fed with fine-grained and coarse-grained limestone were 0.72 and 0.35, respectively. The apparent retention coefficients estimated for laying hens fed fine-grained and coarse-grained limestone were 0.96 and 0.47, respectively.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"1 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67588840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-24DOI: 10.1590/1678-992x-2022-0045
E. Kitajima, E. Nakasu, A. Inoue-Nagata, R. Salaroli, P. L. Ramos-González
: Tomato fruit blotch virus (ToFBV) is a blunervirus that causes blotches on mature tomato ( Solanum lycopersicon L.) fruits in Italy and Australia in 2020, and was newly detected in Brazil. A cytological study on pericarp tissues from the blotched areas of infected fruits collected in Brasília, Brazil, revealed characteristic cell alterations. Small and slender bacilliform particles (ca. 25 nm wide × 100 nm long) were found accumulating in the perinuclear space and the lumen of the endoplasmic reticulum of the epidermis, peri- and mesocarp cells. No viroplasm-like inclusion was observed either in the nuclei or in the cytoplasm. Such cell alterations are reminiscent of those described in cultured mosquito cells infected by negeviruses, an unofficial group of insect viruses. Negeviruses and some other arthropod-borne viruses shared a common ancestor in the RdRp gene with kitavirids, including blunerviruses. Although additional detailed studies are required, we show evidence that ToFBV particles are enveloped and bacilliform, and that such similarity in cytopathology seems to support the evolutionary relationship between plant kitavirids and insect negeviruses.
{"title":"Tomato fruit blotch virus cytopathology strengthens evolutionary links between plant blunerviruses and insect negeviruses","authors":"E. Kitajima, E. Nakasu, A. Inoue-Nagata, R. Salaroli, P. L. Ramos-González","doi":"10.1590/1678-992x-2022-0045","DOIUrl":"https://doi.org/10.1590/1678-992x-2022-0045","url":null,"abstract":": Tomato fruit blotch virus (ToFBV) is a blunervirus that causes blotches on mature tomato ( Solanum lycopersicon L.) fruits in Italy and Australia in 2020, and was newly detected in Brazil. A cytological study on pericarp tissues from the blotched areas of infected fruits collected in Brasília, Brazil, revealed characteristic cell alterations. Small and slender bacilliform particles (ca. 25 nm wide × 100 nm long) were found accumulating in the perinuclear space and the lumen of the endoplasmic reticulum of the epidermis, peri- and mesocarp cells. No viroplasm-like inclusion was observed either in the nuclei or in the cytoplasm. Such cell alterations are reminiscent of those described in cultured mosquito cells infected by negeviruses, an unofficial group of insect viruses. Negeviruses and some other arthropod-borne viruses shared a common ancestor in the RdRp gene with kitavirids, including blunerviruses. Although additional detailed studies are required, we show evidence that ToFBV particles are enveloped and bacilliform, and that such similarity in cytopathology seems to support the evolutionary relationship between plant kitavirids and insect negeviruses.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"1 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67589587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hefri Heni Sinaga, I. N. Widyantari, Ferdinan Situmorang
Tujuan dari penelitian ini adalah untuk mengetahui besar hasil tangkapan ikan dan udang nelayan lokal dan non lokal serta untuk menganalisis besarnya pendapatan nelayan lokal dan non lokal terhadap UMR. Metode penelitian yang digunakan yaitu dengan metode survei, wawancara, kuisioner. Pemilihan sampel dilakukan dengan simple random sampling dan sensus. Data dianalisis dengan rumus analisis biaya, penerimaan, pendapatan dan perhitungan persentase. Hasil penelitian menunjukkan bahwa rata-rata penerimaan nelayan lokal tradisional dimusim rendah sebesar Rp 4.498.125/bulan sedangkan pada musim tinggi Rp 16.275.625/bulan dan untuk nelayan non lokal tradisional dimusim rendah sebesar Rp 2.760.000/bulan sedangkan pada musim tinggi sebesar Rp 13.759.310/bulan. Rata-rata pendapatan nelayan lokal tradisional dimusim rendah Rp 3.340.334/bulan sedangkan pada musim tinggi sebesar Rp 15.062.155/bulan dan untuk nelayan non lokal tradisional dimusim rendah sebesar Rp 1.396.563/bulan sedangkan pada musim tinggi sebesar Rp 12.306.571/bulan, namun untuk pendapatan pertahun dalam perbulannya nelayan lokal tradisional sebesar Rp 6.412.528/bulan dan untuk nelayan non lokal tradisional sebesar Rp 4.684.092/bulan dengan tingkat persetanse terhadap UMR Kabupaten Merauke pada nelayan lokal tradisional sebesar 55% dan untuk nelayan non lokal tradisional sebesar 75%.
{"title":"Analisis Pendapatan Nelayan Tradisional Lokal dan Non Lokal Terhadap UMR pada Wilayah Pesisir","authors":"Hefri Heni Sinaga, I. N. Widyantari, Ferdinan Situmorang","doi":"10.35724/ag.v12i1.4434","DOIUrl":"https://doi.org/10.35724/ag.v12i1.4434","url":null,"abstract":"Tujuan dari penelitian ini adalah untuk mengetahui besar hasil tangkapan ikan dan udang nelayan lokal dan non lokal serta untuk menganalisis besarnya pendapatan nelayan lokal dan non lokal terhadap UMR. Metode penelitian yang digunakan yaitu dengan metode survei, wawancara, kuisioner. Pemilihan sampel dilakukan dengan simple random sampling dan sensus. Data dianalisis dengan rumus analisis biaya, penerimaan, pendapatan dan perhitungan persentase. Hasil penelitian menunjukkan bahwa rata-rata penerimaan nelayan lokal tradisional dimusim rendah sebesar Rp 4.498.125/bulan sedangkan pada musim tinggi Rp 16.275.625/bulan dan untuk nelayan non lokal tradisional dimusim rendah sebesar Rp 2.760.000/bulan sedangkan pada musim tinggi sebesar Rp 13.759.310/bulan. Rata-rata pendapatan nelayan lokal tradisional dimusim rendah Rp 3.340.334/bulan sedangkan pada musim tinggi sebesar Rp 15.062.155/bulan dan untuk nelayan non lokal tradisional dimusim rendah sebesar Rp 1.396.563/bulan sedangkan pada musim tinggi sebesar Rp 12.306.571/bulan, namun untuk pendapatan pertahun dalam perbulannya nelayan lokal tradisional sebesar Rp 6.412.528/bulan dan untuk nelayan non lokal tradisional sebesar Rp 4.684.092/bulan dengan tingkat persetanse terhadap UMR Kabupaten Merauke pada nelayan lokal tradisional sebesar 55% dan untuk nelayan non lokal tradisional sebesar 75%.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"50 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74226951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung sudah mulai banyak dikembangkan oleh petani saat ini, termasuk di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato. Tujuan penelitian ini (1) Untuk mengetahui tingkat pendapatan padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato, (2) Untuk mengetahui tingkat kelayakan usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato (3) Untuk mengetahui BEP produksi, harga, penerimaan usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato. Metode yang digunakan adalah metode survey, pengambilan data dilakukan dengan wawancara langsung dengan petani, jumlah populasi sebanyak 35 orang. Hasil penelitian (1) Pendapatan rata-rata usaha tani padi sawah dengan sistem Tabela tanam benih langsung di Desa Buntulia Utara Kabupaten Pohuwato dalam satu musim tanam sebesar Rp 14.918.919,00. (2) Usaha tani padi sawah dengan sistem Tabela tanam benih langsung di Desa Buntulia Utara Kabupaten Pohuwato layak untuk dijalankan dikembangkan dengan nilai R/C ratio 6,65 > 1. (3) Usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kabupaten Pohuwato mengalami break even tidak untung dan tidak rugi jika produksi yang dihasilkan 144 kg, harga jual Rp 654,00 dan penerimaan Rp 116.792,00.
{"title":"Analisis Usahatani Padi Sawah (Oryza sativa. L) Sistem Tanam Benih Langsung (TABELA)","authors":"Irwan Nooyo, Muhammad Nasrul","doi":"10.35724/ag.v12i1.4435","DOIUrl":"https://doi.org/10.35724/ag.v12i1.4435","url":null,"abstract":"Usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung sudah mulai banyak dikembangkan oleh petani saat ini, termasuk di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato. Tujuan penelitian ini (1) Untuk mengetahui tingkat pendapatan padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato, (2) Untuk mengetahui tingkat kelayakan usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato (3) Untuk mengetahui BEP produksi, harga, penerimaan usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kecamatan Buntulia Kabupaten Pohuwato. Metode yang digunakan adalah metode survey, pengambilan data dilakukan dengan wawancara langsung dengan petani, jumlah populasi sebanyak 35 orang. Hasil penelitian (1) Pendapatan rata-rata usaha tani padi sawah dengan sistem Tabela tanam benih langsung di Desa Buntulia Utara Kabupaten Pohuwato dalam satu musim tanam sebesar Rp 14.918.919,00. (2) Usaha tani padi sawah dengan sistem Tabela tanam benih langsung di Desa Buntulia Utara Kabupaten Pohuwato layak untuk dijalankan dikembangkan dengan nilai R/C ratio 6,65 > 1. (3) Usaha tani padi sawah dengan sistem (Tabela) tanam benih langsung di Desa Buntulia Utara Kabupaten Pohuwato mengalami break even tidak untung dan tidak rugi jika produksi yang dihasilkan 144 kg, harga jual Rp 654,00 dan penerimaan Rp 116.792,00.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"33 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73549380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yus Witdarko, J. Jamaludin, Parjono Parjono, Wiyan Afriyanto Pamungkas
Penelitian ini bertujuan untuk mengidentifikasi mutu tepung sagu “Dwitrap†kemasan 1 kg dengan memberikan perlakuan perendaman dengan variasi jenis air: air yang berasal dari Kampung Tambat; air sumur; air mineral; dan air galon pada lama waktu perendaman 12 jam dan 24 jam untuk mencapai mutu tepung sagu sesuai SNI 01-3729-2008. Hasil yang diperoleh menunjukkan bahwa tepung sagu yang diberi perlakuan memiliki mutu yang sesuai SNI 01-3729-2008 ditinjau dari parameter kadar air (KA) yang bernilai sekitar 13%. Nilai pH yang berkisar 6-7 juga menunjukkan bahwa tepung sagu yang dihasilkan tidak mengandung asam organik yang berlebih sehingga dapat mengakibatkan sagu memiliki rasa asam. Kandungan serat kasar dan kehalusan tepung lolos ayakan 100 mesh yang diperoleh tidak belum dengan standar mutu SNI sehingga perlu dilakukan perbaikan dalam proses pengolahan sagu misalnya dengan mesin pengayak agar serat dari batang sagu tidak terikut dan menurunkan mutu tepung sagu. Hasil yang diperoleh menunjukkan adanya pengaruh perendaman terhadap peningkatan mutu tepung sagu “Dwitrapâ€.
{"title":"Pengaruh Perendaman Terhadap Mutu Tepung Sagu (Metroxylon sp.) di Kampung Tambat Kabupaten Merauke","authors":"Yus Witdarko, J. Jamaludin, Parjono Parjono, Wiyan Afriyanto Pamungkas","doi":"10.35724/ag.v12i1.4438","DOIUrl":"https://doi.org/10.35724/ag.v12i1.4438","url":null,"abstract":"Penelitian ini bertujuan untuk mengidentifikasi mutu tepung sagu “Dwitrap†kemasan 1 kg dengan memberikan perlakuan perendaman dengan variasi jenis air: air yang berasal dari Kampung Tambat; air sumur; air mineral; dan air galon pada lama waktu perendaman 12 jam dan 24 jam untuk mencapai mutu tepung sagu sesuai SNI 01-3729-2008. Hasil yang diperoleh menunjukkan bahwa tepung sagu yang diberi perlakuan memiliki mutu yang sesuai SNI 01-3729-2008 ditinjau dari parameter kadar air (KA) yang bernilai sekitar 13%. Nilai pH yang berkisar 6-7 juga menunjukkan bahwa tepung sagu yang dihasilkan tidak mengandung asam organik yang berlebih sehingga dapat mengakibatkan sagu memiliki rasa asam. Kandungan serat kasar dan kehalusan tepung lolos ayakan 100 mesh yang diperoleh tidak belum dengan standar mutu SNI sehingga perlu dilakukan perbaikan dalam proses pengolahan sagu misalnya dengan mesin pengayak agar serat dari batang sagu tidak terikut dan menurunkan mutu tepung sagu. Hasil yang diperoleh menunjukkan adanya pengaruh perendaman terhadap peningkatan mutu tepung sagu “Dwitrapâ€.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"67 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73797301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Penelitian ini bertujuan untuk menemukan keberadaan hama dan mengidentifikasi jenis-jenis hama yang menyerang tanaman kacang panjang beserta gejala serangan yang terlihat pada tanaman di Dusun Abe Pantai, Kelurahan Asano Distrik Abepura Kota Jayapura. Metode yang digunakan dalam penelitian ini adalah metode diskriptif, dengan pendekatan penelitian survei. Dalam survei ini dilakukan tiga macam teknik pengumpulan data yaitu :Wawancara, Observasi dan Studi Kepustakaan. Pengamatan dilakukan untuk mengetahui jenis hama utama yang menyerang tanaman kacang panjang pada setiap satuan percobaan. Jenis-Jenis hama yang diamati akan dibagi dalam 3 kelompok yaitu: 1) Hama yang menyerang tanaman pada pagi hari (pukul 06.00 – 08.00); 2) Hama yang menyerang tanaman pada siang hari (pukul 11.00 – 13.00); 3) Hama yang menyerang tanaman pada sore hari (pukul 16.00 – 18.00). Seluruh pengamatan dilakukan sebanyak 2 kali yaitu 2 hari pengamatan dengan jarak antara pengamatan 1 dengan pengamatan 2 adalah 7 hari. Sasaran pengamatan adalah bagian tanaman yang diduga terserang yaitu daun, tangkai daun, batang dan polong kacang panjang. Hasil penelitian ini menunjukan bahwa hama yang ditemukan pada areal pertanaman kacang panjang di dusun Abe Pantai, Distrik Abepura, Kota Jayapura berjumlah 9 jenis hama yaitu: hama belalang, ulat jengkal, kutu daun, ulat grayak, kumbang koksi, kepik hijau, ulat bunga, ulat penggulung daun dan ulat penggerek polong tanaman kacang panjang.
{"title":"Survei Keberadaan Hama Pada Tanaman Kacang Panjang (Vigna sinensis L.) Di Dusun Abe Pantai Kelurahan Asano Distrik Abepura Kota Jayapura","authors":"Batseba Gomies","doi":"10.35724/ag.v12i1.4437","DOIUrl":"https://doi.org/10.35724/ag.v12i1.4437","url":null,"abstract":"Penelitian ini bertujuan untuk menemukan keberadaan hama dan mengidentifikasi jenis-jenis hama yang menyerang tanaman kacang panjang beserta gejala serangan yang terlihat pada tanaman di Dusun Abe Pantai, Kelurahan Asano Distrik Abepura Kota Jayapura. Metode yang digunakan dalam penelitian ini adalah metode diskriptif, dengan pendekatan penelitian survei. Dalam survei ini dilakukan tiga macam teknik pengumpulan data yaitu :Wawancara, Observasi dan Studi Kepustakaan. Pengamatan dilakukan untuk mengetahui jenis hama utama yang menyerang tanaman kacang panjang pada setiap satuan percobaan. Jenis-Jenis hama yang diamati akan dibagi dalam 3 kelompok yaitu: 1) Hama yang menyerang tanaman pada pagi hari (pukul 06.00 – 08.00); 2) Hama yang menyerang tanaman pada siang hari (pukul 11.00 – 13.00); 3) Hama yang menyerang tanaman pada sore hari (pukul 16.00 – 18.00). Seluruh pengamatan dilakukan sebanyak 2 kali yaitu 2 hari pengamatan dengan jarak antara pengamatan 1 dengan pengamatan 2 adalah 7 hari. Sasaran pengamatan adalah bagian tanaman yang diduga terserang yaitu daun, tangkai daun, batang dan polong kacang panjang. Hasil penelitian ini menunjukan bahwa hama yang ditemukan pada areal pertanaman kacang panjang di dusun Abe Pantai, Distrik Abepura, Kota Jayapura berjumlah 9 jenis hama yaitu: hama belalang, ulat jengkal, kutu daun, ulat grayak, kumbang koksi, kepik hijau, ulat bunga, ulat penggulung daun dan ulat penggerek polong tanaman kacang panjang.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"8 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73893574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ikan asap yang biasanya disebut oleh masyarakat sebagai ikan asar merupakan produk hasil olahan masyarakat di Kelurahan Hinekombe Kabupaten Jayapura. Salah satu pengolahan ikan asap yang merupakan sentra produksi penjualan ikan asap yang selama ini dipasarkan di pasar Prahara Kota Sentani Kabupaten Jayapura yaitu industri rumahan. Mengingat produk yang dihasilkan dalam usaha tersebut yaitu bersifat musiman, sehingga penting memperhatikan aspek ketersediaan dan keberlanjutan. Tujuan penelitian yaitu menganalisis kelayakan usaha ikan cakalang (Kasuwonus pelamis L) oleh masyarakat pengolah ikan asap di Kelurahan Hinekombe Kabupaten Jayapura. Metode yang digunakan dalam penelitian ini yaitu metode kuantitatif dengan menganalisis secara finansial dan mengetahui besar total biaya produksi, penerimaan, total pendapatan, dan Net Benefit Cost Ratio (Net B/C Ratio). Hasil penelitian menunjukkan bahwa Ratio keuntungan Wiji dan Sumiarsih > 1. Perolehan nilai Ratio tersebut memberikan gambaran bahwa usaha pengolahan ikan asap layak untuk dilanjutkan.
{"title":"Analisis Kelayakan Usaha Ikan Cakalang (Katsuwonus pelamis, L) oleh Masyarakat Pengolah Ikan Asap","authors":"Samuel Jeujanan, Evi Tasriani","doi":"10.35724/ag.v12i1.4436","DOIUrl":"https://doi.org/10.35724/ag.v12i1.4436","url":null,"abstract":"Ikan asap yang biasanya disebut oleh masyarakat sebagai ikan asar merupakan produk hasil olahan masyarakat di Kelurahan Hinekombe Kabupaten Jayapura. Salah satu pengolahan ikan asap yang merupakan sentra produksi penjualan ikan asap yang selama ini dipasarkan di pasar Prahara Kota Sentani Kabupaten Jayapura yaitu industri rumahan. Mengingat produk yang dihasilkan dalam usaha tersebut yaitu bersifat musiman, sehingga penting memperhatikan aspek ketersediaan dan keberlanjutan. Tujuan penelitian yaitu menganalisis kelayakan usaha ikan cakalang (Kasuwonus pelamis L) oleh masyarakat pengolah ikan asap di Kelurahan Hinekombe Kabupaten Jayapura. Metode yang digunakan dalam penelitian ini yaitu metode kuantitatif dengan menganalisis secara finansial dan mengetahui besar total biaya produksi, penerimaan, total pendapatan, dan Net Benefit Cost Ratio (Net B/C Ratio). Hasil penelitian menunjukkan bahwa Ratio keuntungan Wiji dan Sumiarsih > 1. Perolehan nilai Ratio tersebut memberikan gambaran bahwa usaha pengolahan ikan asap layak untuk dilanjutkan.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"56 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86056352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aras Syazili, Moh. Afrisal, Khamsia Ahmad, Sudirto Malan
Penelitian ini dilakukan untuk mengetahui efektifitas penggunaan ekstrak buah keben sebagai bahan anestesi pada benih ikan mas. Ekstrak buah keben digunakan sebagai perlakuan dengan dosis masing-masing 0 mL/L (kontrol), 1 mL/L, 1,5 mL/L dan 2 mL/L. Parameter yang diamati adalah waktu sedatif, waktu induktif, kelangsungan hidup dan kualitas air. Hasil penelitian menunjukkan bahwa pada perlakuan 2 mL/L merupakan waktu sedatif 15,5±0,72(P< 0,05), waktu induktif 12,25±0,42 (P< 0,05) dan kelangsungan hidup 93,33±0,27 (P< 0,05) yang terbaik serta kualitas air yang normal.
{"title":"Efektivitas Ekstrak Buah Keben (Barringtonia asiatica) sebagai Bahan Anastesi Alami pada Benih Ikan Mas (Cyprinus carpio)","authors":"Aras Syazili, Moh. Afrisal, Khamsia Ahmad, Sudirto Malan","doi":"10.35724/ag.v12i1.4433","DOIUrl":"https://doi.org/10.35724/ag.v12i1.4433","url":null,"abstract":"Penelitian ini dilakukan untuk mengetahui efektifitas penggunaan ekstrak buah keben sebagai bahan anestesi pada benih ikan mas. Ekstrak buah keben digunakan sebagai perlakuan dengan dosis masing-masing 0 mL/L (kontrol), 1 mL/L, 1,5 mL/L dan 2 mL/L. Parameter yang diamati adalah waktu sedatif, waktu induktif, kelangsungan hidup dan kualitas air. Hasil penelitian menunjukkan bahwa pada perlakuan 2 mL/L merupakan waktu sedatif 15,5±0,72(P< 0,05), waktu induktif 12,25±0,42 (P< 0,05) dan kelangsungan hidup 93,33±0,27 (P< 0,05) yang terbaik serta kualitas air yang normal.","PeriodicalId":49559,"journal":{"name":"Scientia Agricola","volume":"39 1","pages":""},"PeriodicalIF":2.6,"publicationDate":"2022-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86213055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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