A REVIEW OF PRODUCTION FRONTIER RESEARCH IN AQUACULTURE (2001–2011)     

Abdullahi Iliyasu  Zainal Abidin Mohamed  Mohd Mansor Ismail  Amin Mahir Abdullah  Salleh Mohamed Kamarudin  Hashim Mazuki 《Aquaculture Economics & Management (Blackwell Science)》2013,17(3):221-247

Most research works on the production frontier in aquaculture focus on efficiency measurement using either Stochastic Production Frontier (SPF) or Data Envelopment Analysis (DEA). The studies on productivity growth in aquaculture were limited, perhaps due to lack of time-series data. Nevertheless, total factor productivity analysis (TFP) in fish farms has started gaining popularity in recent years. In addition, the majority of the efficiency studies have centered on technical efficiency analysis but substantial increases in the output levels can be fully realized through improving overall economic efficiency. Therefore, this review suggests that future research should estimate all three efficiency indices (i.e., technical, allocative and economic efficiencies).  相似文献   

Fish meal replacement with rice protein concentrate in a practical diet for the Pacific white shrimp, Litopenaeus vannamei Boone, 1931     

Amin Oujifard  Jafar Seyfabadi  Abdolmohammad Abedian Kenari  Masood Rezaei 《Aquaculture International》2012,20(1):117-129

Replacement of fish meal (FM) with rice protein concentrate (RPC) as a practical diet for the Pacific white shrimp, Litopenaeus vannamei, was evaluated. Five isonitrogenous (36.6% protein) diets, formulated by replacing 0, 25, 50, 75, and 100% of FM by RPC, were fed to shrimp (initial weight of 6.99 ± 0.08 g) five times daily to satiation for 60 days. Relatively high final weight (FW 17.64–18.25 g) and weight gain (WG 10.81–11.39 g) were obtained in treatments up to 50% of the plant protein inclusion. Above this inclusion level, FW (14.93–14.35 g) and WG (7.68–7.23 g) were reduced. Survival was high (≥95%) and similar for all diets. There were no significant differences (P > 0.05) in tail-muscle composition (moisture, protein, lipid, and ash) among different dietary treatments. Dispensable and indispensable amino acids of the tail muscle of shrimp fed with 25, 50, and 75% RPC were significantly higher than the FM (0%) and 100% RPC diets. A decreasing trend in apparent digestibility coefficient (excluding dry matter) for crude protein (90.52–52.41), ether extract (94.11–80.03), organic matter (87.25–50.16), and gross energy (89.41–55.24) was observed at higher RPC inclusion rates. The results suggest that RPC meal can be a potential candidate for FM replacement up to 50% of the protein in shrimp diets.  相似文献   

Response Surface Methodology for Modeling Bisphenol A Removal Using Ultrafiltration Membrane System     

Mimi Suliza Muhamad  Nuramidah Hamidon  Mohd Razman Salim  Zulkifli Yusop  Woei Jye Lau  Tony Hadibarata 《Water, air, and soil pollution》2018,229(7):222

In this work, the effects of various operating parameters (pressure, pH, BPA concentration, and filtration time) toward bisphenol A (BPA) removal via ultrafiltration (UF) membrane system were investigated using response surface methodology (RSM). Historical data design of RSM was used to obtain the interaction between variables and response as well as optimizing the process. The analysis of variance (ANOVA) showed that the third-order polynomial model was significant in which pH and filtration time were identified as significant terms that influence BPA removal. The 3D response surface plots revealed the two-factor interaction between independent and dependent variables. The optimization process of the model predicted optimum conditions of 99.61% BPA removal at 1 bar, pH 6.7, 10 μg/L BPA concentration, and 10-min filtration time. The predicted optimum conditions for BPA removal were consistent with the obtained experimental values, indicating reliable application of historical data design RSM for modeling BPA removal in UF membrane system.  相似文献   

Sulfur uptake and translocation in maize (zea mays) grown in a high pH soil treated with elemental sulfur     

Mehdi Karimizarchi  Amin Soltangheisi  Aminuddin Husin  Mohd Khanif Yusop  Radziah Othman 《Journal of plant nutrition》2018,41(14):1798-1806

A glasshouse experiment was conducted to elucidate the influence of elemental sulfur (S) application rates (0, 0.5, 1.0, and 2.0 g S kg^?1 soil) on the release and uptake of S at 0, 20, and 40 days after incubation. Results showed that there was a progressive upward trend in maize leaves, stem, and root S content with application of elemental S. However, maize production followed a nonlinear model. Plants grown in untreated soils suffer from S deficiency and addition of elemental S at a rate of 0.5 g S kg^?1 soil alleviated S deficiency. The decrease in maize performance due to the highest S application rate was not related to S toxicity. The greatest leave, stem, and root productions were obtained at S concentrations of 0.41, 0.58, and 0.2%, respectively. Overall, application of elemental S at a rate of 0.5 g S kg^?1 soil is recommended for maize performance improvement.  相似文献   

Reducing Soil Phosphorus Fixation to Improve Yield of Maize on a Tropical Acid Soil Using Compost and Biochar Derived from Agro-Industrial Wastes     

Huck Ywih Ch'ng  Nik Muhamad Ab. Majid  Mohamadu Boyie Jalloh 《Compost science & utilization》2017,25(2):82-94

Phosphorus is an essential element required to maintain profitable crop production. Most soils of the tropics, such as Ultisols, are acidic and fix phosphorus because of their characteristically high contents of aluminium and iron. Compost and biochar could be used to mitigate phosphorus fixation by reducing the phosphorus sorption sites. This study aimed to: (i) improve soil phosphorus availability, nutrient uptake, and yield of maize using biochar and pineapple leaf residue compost; and (ii) determine if the use of biochar and compost could exert a residual effect on phosphorus nutrition in the second cycle of the field trial. Field trials were carried out using a Zea mays L. hybrid as the test crop. At harvest, the plants were harvested, partitioned into leaves and stems, and analyzed. Soil samples were also collected and analyzed. Ears were harvested to determine the yield from each treatment. The results suggest that the soil total phosphorus and available phosphorus recovered from the treatments with the organic amendments were higher compared with the non-organic amendments. The availability of soil nutrients (nitrogen, potassium, calcium, magnesium, and sodium) in the soils and yield of maize were higher in the treatments with the organic amendments in the first and second field trials. These results further confirm that amending chemical fertilizers with organic amendments have a larger residual effect than chemical fertilizers only. Amending chemical fertilizers with organic amendments can be used to ameliorate phosphorus fixation of acid soils to improve maize production on acid soils.  相似文献   

Genetic relationships among improved varieties of rice (<Emphasis Type="Italic">Oryza sativa</Emphasis> L.) in Indonesia over the last 60 years as revealed by morphological traits and DNA markers     

Kadapi Muhamad  Kaworu Ebana  Shuichi Fukuoka  Kazutoshi Okuno 《Genetic Resources and Crop Evolution》2017,64(4):701-715

Morphological traits and two kinds of molecular markers were employed to study the genetic relationships among improved rice (Oryza sativa ) varieties of Indonesia since 1943. Dendrograms based on morphological traits and both molecular markers (simple sequence repeats, SSR and single nucleotide polymorphism, SNP) agreed in separating the varieties into two primary groups. Based on the morphological traits, a larger group (>60 %) contains varieties with smaller sizes compared with those in the smaller group (<40 %). SSR and SNP markers revealed that most of the varieties belonged to indica (88; 89 %) and japonica (9; 8 %) subspecies, and 3 % of varieties were not involved in two subspecies. The molecular markers revealed that the genetic diversity (H) stagnated between stage II (1967–1985) and stage III (1986–2003). However, during stage I (1943–1966), H was higher than in the other stages as revealed by SNP markers, while H in stage I was lower than in the other stages as revealed by SSR markers. In this study, the two molecular data sets were positively correlated and positive correlations between the phenotypic and molecular data depended on the kind of molecular marker: SNP had higher Mantel r values than SSRs. Besides, SSR markers seem to be appropriate for pedigree studies, while SNP markers could be used to reveal genomic relationships. These findings were attributable to the different properties of these two different markers. These results suggested that the diversity and differentiation of both the phenotypic and molecular marker variations were probably resulted from the crossing and selection in rice breeding in Indonesia. We suggest that Indonesia needs another strategy to improve new varieties to avoid a reduction in genetic diversity and similarity.  相似文献   

Diversity and differentiation of <Emphasis Type="Italic">Oryza sativa</Emphasis> and <Emphasis Type="Italic">O. rufipogon</Emphasis> in Indonesia     

Kadapi Muhamad  Kaworu Ebana  Shuichi Fukuoka  Kazutoshi Okuno 《Genetic Resources and Crop Evolution》2017,64(1):41-54

Analysis of the genetic structure of Indonesian Oryza sativa and O. rufipogon using neighbour-joining trees based on single nucleotide polymorphism (SNP) and simple sequence repeat (SSR) markers revealed that O. sativa in Indonesia is separated from O. rufipogon. Accessions of O. sativa in this study were differentiated into two major groups, indica and tropical japonica, excluding some varieties. SSR and SNP markers revealed the high value of differentiation (F _ST) and genetic distance (D) between indica and tropical japonica and we discovered four loci by SNP markers and one locus by SSR markers that play a role in differentiation between indica and tropical japonica. Interestingly, genetic diversity (H) in O. rufipogon was lower than that in O. sativa, however H in O. rufipogon was the highest and H in tropical japonica was the lowest when O. sativa was divided into two groups. Inbreeding coefficient (Fst) showed evidences that gene flow (Nm) between species and within species might be one of the mechanisms related to the diversification and differentiation of Indonesian rice germplasm by asymmetric pattern between species and within O. sativa as revealed by SSR and SNP markers. In addition, we found evidences on stabilizing selection in Indonesian rice germplasm and they might be the reasons why Indonesian rice germplasm did not differentiate due to source location of landrace. However, we found a weak relation between SSR and SNP markers probably due to highly polymorphic in SSR and the different properties of both markers.  相似文献   

商业生产条件下香辣宝6930对肉鸡生产性能的影响     

张津校  闫胜华  林树森  刘佃章  Amin vikari 《中国畜牧杂志》2010,46(8)

在欧洲,产品香辣宝6930(含3种植物提取物的有效成分:香芹酚、肉桂醛和辣椒素)作为抗生素促生长剂替代物在饲料中添加应用研究已经超过10年。然而,有关该产品在中国商业生产条件下的应用效果还未有过正式报道。本试验在同一栋畜舍内分2个批次进鸡重复相同的对比试验,试验分对照组和试验组,试验组是将对照日粮能量浓度降低25kcal/kg后,额外添加香辣宝6930100g/t到饲料中,观察其对肉鸡生产性能和成活率的影响效果。结果表明,在最初的2—4周,香辣宝对肉鸡体重增长有促进作用但尚未达到统计学的显著水平,但2个批次试验的料重比均减少2%以上;但试验最后2周和全期统计结果的增重和料重比与对照相比均有显著提高(3.5%,P0.05);从2个批次不同健康状态试验鸡的比较来看,香辣宝6930对健康状态稍差的鸡的成活率改善状况与对照相比更加明显(6.73%,P0.05)。  相似文献   

马来西亚未尽利用热带水果概况     

邱福荣  邝建荣  赵丽仪  Azrina AZLAN  孙健  Amin ISMAIL  Salma IDRIS 《广西农业科学》2010,41(7):698-702

未尽利用热带水果,即在当地消费和医用的非贸易热带水果,未普及化,生长于野外,季节性强,但富含多酚类化合物、类胡萝卜素、花青素、脂肪酸、矿物质和氨基酸,因而具有一定的开发潜力。在马来西亚,热带水果丰富多样,主要有普通水果、观赏水果、特有水果、野生水果和高地水果,但大部分水果都未能充分利用,其中,典型的有罗望子、巴杖果、砂拉越芒果、钮扣山竹、榴莲、莲雾、挂尼芒果、野红毛丹和蛇皮果。这些水果可以分为3个类型：具有贸易开发潜力的主要包括无花果（Ficus sp.）、罗望子（Garcinia atroviridis）、尖必达（Artocarpus integer）、鲜花木果（Lepisan-thes alata）、野榴莲（Durio sp.）、橄榄木（Spondias cytherea）、菠萝蜜（Artocarpus heterophullus）、槟榔（Areca catechu）、野红毛丹（Nephelium ramboutan-ake）、蛇皮果（Salacca zalacca）和面包果（Artocarpus altilis）;具有适于当地人们利用潜力的水果种类包括木胡瓜（Averrhoe bilimbi）、榔拜果（Baccaurea motteyana）、单贝果Baccaurea macrocarpa）、喃喃果属（Cynometra cauliflora）、西柚（Dialum indum）、黄肉榴莲（Durio kutejensis）、野生山竹（Garcinia hombroiniana）、野檬果（Garcinia parvifolia）、巴杖果（Mangifera feotida）、醋栗（Phyllanthus emblica）、蒲桃（Syzygium jambos）;不具有经济利用开发潜力的水果种类包括哥露比（Salacca conferta）、青枣（Zizyphus mauritiana）、木奶果属（Baccaurea polyneura）、野檬果（Garcinia parvifolia）、番龙眼（Pometia sp.）、赤才果（Leppisanthes rubiginosa）、波漆果（Bouea microphylla）、蛋黄果（Pouteria campechiana）和仙都果（Sandoricum koetjape）。目前,有关未尽利用水果研究仍处于初期阶段,有必要使这些水果更为普及并得到有效利用,因此,政府和私人组织须采取一些措施以促进这些水果的消费。今后需对这些水果的营养成分、抗氧化作用以及疗效进行深入研究。  相似文献   

Protein and energy nutrition of brook trout (Salvelinus fontinalis) at optimal and elevated temperatures          下载免费PDF全文

M. N. Amin  C. G. Carter  R.S. Katersky Barnes  L. R. Adams 《Aquaculture Nutrition》2016,22(3):527-540

The digestible protein (DP) and digestible energy (DE) requirements for maintenance and growth of brook trout (Salvelinus fontinalis) were determined using a factorial model at either optimum (15 °C) or elevated temperature (19 °C). Several key parameters of the factorial model were measured using a series of inter‐related studies. The maintenance requirements for DP and DE were 0.10 gDP kg^?0.69 day^?1 (15 °C) and 0.31 gDP kg^?0.78 day^?1 (19 °C), and 34.86 kJDE kg^?0.84 day^?1 (15 °C) and 46.14 kJDE kg^?0.86 day^?1 (19 °C). The total requirements for DP were 0.10 gDP kg^?0.69 day^?1 + 2.14PG (protein gain) (15 °C) and 0.31 gDP kg^?0.78 day^?1 + 1.98PG (19 °C). The total requirements for DE were 36.86 kJDE kg^?0.84 day^?1 + 1.58EG (energy gain) (15 °C) and 46.14 kJDE kg^?0.86 day^?1 + 1.64EG (19 °C). The partial efficiencies for growth were 0.47 (15 °C) and 0.51 (19 °C) for protein, and 0.63 (15 °C) and 0.61 (19 °C) for energy. Nutrient gain was lower at the elevated temperature; however, feed formulation for brook trout should be adjusted to match changes in nutrient requirements at different culture temperatures. The protein and energy requirements model will be useful for developing commercial feeds and feeding charts for brook trout.  相似文献