Aquacultural Engineering最新文献

{"title":"Feeding control and water quality monitoring on bioenergetic fish growth modeling: Opportunities and challenges","authors":"Fahad Aljehani ,&nbsp;Ibrahima N’Doye ,&nbsp;Taous-Meriem Laleg-Kirati","doi":"10.1016/j.aquaeng.2024.102511","DOIUrl":"10.1016/j.aquaeng.2024.102511","url":null,"abstract":"<div><div>Aquaculture systems can benefit from the recent development of advanced control strategies to reduce operating costs and fish loss and increase growth production efficiency, resulting in fish welfare and health. Monitoring the water quality and controlling feeding are fundamental elements of balancing fish productivity and shaping the fish growth process. Currently, most fish-feeding processes are conducted manually in different phases and rely on time-consuming and challenging artificial discrimination. The feeding control approach influences fish growth and breeding through the feed conversion rate; hence, controlling these feeding parameters is crucial for enhancing fish welfare and minimizing general aquaculture costs. In addition to feeding, several important environmental factors, such as temperature, dissolved oxygen, and ammonia, also affect fish health and production. Therefore, there is a critical need to develop control strategies to determine optimal, efficient, and reliable feeding processes and monitor water quality. This paper reviews the main control design techniques for fish growth in aquaculture systems, namely algorithms that optimize the feeding and water quality of a dynamic fish growth process. Specifically, we review model-based control approaches and model-free reinforcement learning strategies to optimize the growth and survival of the fish or track a desired reference live-weight growth trajectory. The model-free framework uses an approximate fish growth dynamic model and does not satisfy constraints. We discuss how model-based approaches can support a reinforcement learning framework to efficiently handle constraint satisfaction and find better trajectories and policies from value-based reinforcement learning.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102511"},"PeriodicalIF":3.6,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of light intensity on the behavioural response and physiological parameters of rainbow trout (Oncorhynchus mykiss)","authors":"Xiao Liu ,&nbsp;Liuyi Huang ,&nbsp;Yuyan Li ,&nbsp;Jianfeng Guan","doi":"10.1016/j.aquaeng.2024.102510","DOIUrl":"10.1016/j.aquaeng.2024.102510","url":null,"abstract":"<div><div>Light conditions play a pivotal role in enhancing the welfare of rainbow trout (<em>Oncorhynchus mykiss</em>) in deeper-offshore aquaculture systems in China. However, optimal light intensity and duration for improving rainbow trout welfare remain unclear due to limited foundational knowledge. This study investigated the effects of different light intensities (control group <em>L</em>₀: 0 lx; treatment groups <em>L</em>₁: 42.8 lx, <em>L</em>₂: 59.0 lx, <em>L</em>₃: 63.5 lx, <em>L</em>₄: 73.0 lx) and exposure durations (1 hour and 7 days) on the behavioural responses and physiological parameters of rainbow trout. Behavioural tests measured the frequency of fish crossing a light curtain during a 10-minute period, while physiological parameters including plasma cortisol, total protein (TP), albumin (ALB), triglyceride (TG), total cholesterol (TC), aspartate transaminase (AST), and alanine transaminase (ALT) were assessed after 1-hour and 7-day treatments. Results reveal that the rainbow trout exhibits the highest crossing frequency under <em>L</em>₁, alongside significantly lower levels of cortisol, TP, TG, TC, and AST compared to higher light intensities. In contrast, higher light intensities (<em>L</em>₂, <em>L</em>₃, and <em>L</em>₄) cause increased stress, reflected by elevated plasma cortisol, protein, lipid, and enzyme levels. There are no significant differences in behaviour or physiological responses between <em>L</em>₀ and <em>L</em>₁. These findings imply that <em>L</em>₁ represents a balanced light intensity that supports natural swimming behaviours with minimal stress, while higher intensities induce elevated stress. Therefore, a light intensity of 42.8 lx (<em>L</em>₁) is recommended to enhance fish welfare in deeper-offshore aquaculture systems when artificial light is utilized.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102510"},"PeriodicalIF":3.6,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards understanding the dynamic behaviour of bioflocs in a fish tank culture: Integration of fish growth and activated sludge modelling","authors":"Nurhayati Br Tarigan ,&nbsp;Marc Verdegem ,&nbsp;Julie Ekasari ,&nbsp;Karel J. Keesman","doi":"10.1016/j.aquaeng.2024.102509","DOIUrl":"10.1016/j.aquaeng.2024.102509","url":null,"abstract":"<div><div>Biofloc can improve the nutrient use efficiency of an aquaculture system. However, knowledge of the dynamic behaviour of biofloc related to the nutrient concentration in the water is limited. This study combined the fish growth model with the activated sludge model (ASM), later called fish-ASM, to understand the dynamic behaviour of biofloc in Nile tilapia culture. Fish were fed two types of diets that differ in fiber content. One of the diet contains three times higher fiber, which was formulated by incorporating more non-starch-polysaccharides (NSP). NSP is expected to increase carbon content in the water and promote more biofloc growth. Initial model parameter values were gained from experiments and ASM number 1. In fish-ASM, waste comes from uneaten feed, fish faeces, decay of heterotrophic and autotrophic biomass, and fish gill excretion (ammonia). Heterotrophic and autotrophic biomass then utilize the waste as substrates for their growth and part of the biomass is consumed by fish as natural food. The main model outputs in this study are hourly dynamics of fish, biofloc, and nitrogen in water. After trial and error calibration process, the model was fit to the fish, biofloc, and nitrogen dynamics of the lower fiber diet datasets with relative mean square error of 3 %-34 % to the corresponding average observations. However, future improvement was needed in the higher fiber diet simulation, especially related to biofloc and ammonia dynamics. The study shows that the development of biofloc was strongly influenced by organic matter availability.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102509"},"PeriodicalIF":3.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Testing of a passive foam fractionator prototype in a commercial recirculating trout farm","authors":"Kim João de Jesus Gregersen,&nbsp;Lars-Flemming Pedersen","doi":"10.1016/j.aquaeng.2024.102507","DOIUrl":"10.1016/j.aquaeng.2024.102507","url":null,"abstract":"<div><div>Foam fractionation has emerged as a technical solution to reduce the build-up of microparticles and dissolved organic matter in recirculating aquaculture systems (RAS). However, commercial application in freshwater RAS is challenging and expensive. In the present study, a simple, low-cost passive foam fractionation (PFF) prototype was developed and tested under commercial conditions. The prototype was tested in a Model Trout Farm (MTF) in three different production raceways during winter and spring to assess the operation and removal potential. A number of different water quality parameters, including organic matter, particles, bacterial activity, and phosphorus were examined in the system water and in the removed foamate. Overall, the PFF prototype removed particles as well as particulate and dissolved organic matter, reduced the amount of bacteria and total phosphorus in the water, regardless of sampling time and place. By utilizing the existing airlifts in the MTF, the associated cost of construction and operation was kept low. Overall, the results demonstrate that the passive foam fractionation has the potential to help address some of aquaculture’s pressing issues in a cost effective manner.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102507"},"PeriodicalIF":3.6,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of diameter-to-depth ratio on the hydrodynamics in recirculating aquaculture tank","authors":"Chenxu Zhao ,&nbsp;Yixuan Hu ,&nbsp;Xiaozhong Ren ,&nbsp;Hangfei Liu ,&nbsp;Shupeng Du ,&nbsp;Gang Wu ,&nbsp;Yinxin Zhou","doi":"10.1016/j.aquaeng.2024.102506","DOIUrl":"10.1016/j.aquaeng.2024.102506","url":null,"abstract":"<div><div>To maximize the spatial utilization rate of the recirculating aquaculture system (RAS) and improve the growth conditions of aquaculture varieties, the present study used the numerical simulation method to investigate the distribution characteristics of the flow velocity inside the aquaculture tank. It is of great practical importance for the design and optimization of the aquaculture tank structures. The computational fluid dynamics (CFD) method and the RNG k-ε turbulent model were applied to analyze the effects of diameter-to-depth ratio <em>(L/H)</em> on the hydrodynamic characteristics inside the aquaculture tank, including the average flow velocity, resistance coefficient, flow velocity uniformity, energy utilization coefficient, vortex and Fraud correction coefficients. The accuracy of proposed method was verified by experimental results. The results show that as the diameter-to-depth ratio <em>(L/H)</em> of the rectangular arc angle aquaculture tank increases, the turbulence intensity in the flow field gradually weakens, the low-velocity area increases, and the average flow velocity decreases. When the diameter-to-depth ratio <em>(L/H)</em> is 3:1–5:1, uniformity coefficients, energy effective use coefficients, and Fraud correction coefficients have significantly been improved, and the flow pattern in the aquaculture tank is the best. Through the research of the present study, it can effectively improve the utlization rate of aquaculture tank space, and provide technical support for the realization of the welfare aquaculture of the recirculating aquaculture system.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102506"},"PeriodicalIF":3.6,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of drum filter mesh size on RAS water quality","authors":"Kim João de Jesus Gregersen ,&nbsp;Petter Olsson ,&nbsp;Carles Pellicer-Nàcher ,&nbsp;Per Bovbjerg Pedersen","doi":"10.1016/j.aquaeng.2024.102508","DOIUrl":"10.1016/j.aquaeng.2024.102508","url":null,"abstract":"<div><div>Drum filters play an important role in recirculating aquaculture systems (RAS) by removing particulate matter from production units. Optimizing their performance has significant importance for water quality as well as investment and running costs. One important parameter affecting both issues is the mesh size applied. This study investigates the impact of drum filter mesh size (70, 45, and 30 µm mesh size and a control group without drum filters) on water quality and system performance in a triplicate trial using rainbow trout (Oncorhynchus mykiss), for a period of eight weeks. The use of drum filters led to significantly less particulate organic matter in the RAS water (more than 60 % reduction in particles, particulate BOD, and particulate COD) as well as reduced microbial activity (50 % reduction of microbial activity in water), while no significant reduction in dissolved organic matter was observed. The removal of particulate organic matter led to improvements across most metrics studied. The study demonstrated that mechanical filters had positive effects on water quality parameters and that reducing mesh size from 70 µm to 45 µm led to further improvements in most water quality parameters, while an additional reduction to a 30 µm mesh did not further improve water quality. The findings underscore the importance of particle removal, mesh size selection, and system design to ensure the best removal rates while maintaining maximum filtration capacity. Interestingly, the changes in water quality achieved by the drum filters led to an improvement in feed utilization resulting in increased biomass production. The results suggest that optimizing drum filter mesh size, particularly utilizing 45 µm mesh, can enhance water quality and perhaps operational profitability in RAS.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102508"},"PeriodicalIF":3.6,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design and testing of a fully automatic aquatic plant combing machine for Eriocheir sinensis farming","authors":"Hao Yuan ,&nbsp;Jiaao Sun ,&nbsp;Jiakai Jiang ,&nbsp;Jinsheng Ku ,&nbsp;Yueping Sun ,&nbsp;Yun Qin","doi":"10.1016/j.aquaeng.2024.102504","DOIUrl":"10.1016/j.aquaeng.2024.102504","url":null,"abstract":"<div><div>Aquatic plant cleaning in Eriocheir sinensis farming currently relies heavily on manual methods, which are labor-intensive and inefficient. To address this issue, this study explores fully automated aquatic plant raking technology. Considering the physical characteristics of aquatic plant in Eriocheir sinensis farming, a novel approach using torsion spring hooks instead of traditional cutting blades for plant removal is proposed. A aquatic plant combing mechanism and a water depth adjustment mechanism were designed to enhance functionality. Furthermore, a multi-drawer-type aquatic plant spreading method was introduced, along with an automatic mechanism for uniformly spreading aquatic plant. Adams simulation software was employed to analyze the movement of the multi-drawer silo under various working conditions, determining the minimum damping force required for the damping mechanism in extreme scenarios. A prototype was subsequently fabricated and tested. Experimental results confirmed that the combing mechanism operated smoothly without jamming, meeting all design specifications. The prototype demonstrated stable underwater performance, reliable depth adjustment, and high cleaning efficiency, fully aligning with the intended design objectives.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102504"},"PeriodicalIF":3.6,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation of the fish number in farming cage from the fish finder echo images via machine learning","authors":"Haruka Nishikawa ,&nbsp;Daisuke Matsuoka ,&nbsp;Yasushi Nishimori ,&nbsp;Takeharu Yamaguchi ,&nbsp;Masanori Ito ,&nbsp;Yoshitaka Watanabe ,&nbsp;Daisuke Sugiyama ,&nbsp;Tatsu Kuwatani ,&nbsp;Yoichi Ishikawa","doi":"10.1016/j.aquaeng.2024.102505","DOIUrl":"10.1016/j.aquaeng.2024.102505","url":null,"abstract":"<div><div>Determining the precise number of farmed fish in a preserve is crucial, as it informs the quantity of feed required. However, especially for ocean-based preserves, this measurement poses a significant challenge. While a fish finder is useful for investigating the state of fish schools in the water, the clarity of the echo image is insufficient for individuals to count each fish. This study aims to address this issue by developing a novel method for fish counting, leveraging combined simulation and machine-learning techniques applied to the echo images from the fish finder. Two key innovations underpin our approach. First, we employ a convolutional neural network (CNN) to extract features from echo images with varying fish numbers to estimate the fish count from a portion of fish school images. Second, we generate virtual echo images via simulation to create a training dataset for the CNN. This step is necessary because CNN image classification requires a large number of images, and preparing such a vast collection of echo images with accurate labels through real-world fish finder observations in a fish preserve is time-consuming. We tested our method in six farming cages housing yellowtail (<em>Seriola quinqueradiata</em>). Our method could estimate the fish count with errors ranging from −0.86 % to 6.89 %. While our method requires further refinement, the results suggest the potential for a new fish-counting system.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102505"},"PeriodicalIF":3.6,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using a passive solar greenhouse with water tanks in overwintering of juvenile sea cucumber Apostichopus japonicus","authors":"Sol-Yon Kim ,&nbsp;Yon-Mi Kim ,&nbsp;Chol-Ho An ,&nbsp;Jin-Myong Ro ,&nbsp;Ryong-Un Kim ,&nbsp;Jun-Sok Kim","doi":"10.1016/j.aquaeng.2024.102494","DOIUrl":"10.1016/j.aquaeng.2024.102494","url":null,"abstract":"<div><div>The present work investigated the overwintering of juvenile sea cucumber <em>Apostichopus japonicus</em> which used a renewable energy system. The experimental period ranged from December 2023 to February 2024. Seawater, benefited from a temperature rise of about 3 °C in an underground pond, was pumped into 3.6 m³ plastic tanks on a rooftop greenhouse of a single-story building and heated by solar radiation. There were 56 such tanks in the greenhouse - half of them (28) were placed close to the south-oriented plastic film and the other half near the north-oriented wall. Those 28 tanks were subdivided into 4 groups of 7 tanks. Each group was heated for 4 days before the content was drained into the sea cucumber culture tanks of 10 m³ placed on ground floor of the building. For those 4 days of winter the water in the tanks was heated to an average of 15–20 °C in the south and 10–15 °C in the north. The culture tanks were divided into two groups to correspond to the south and north tanks and throughout the winter the average water temperatures were maintained at 16 ± 3 °C and 12 ± 3 °C respectively. The numerical experiments confirmed that if the greenhouse is developed into a double-plastic film greenhouse, the temperature of the tanks can be raised to 20.8 °C in the south and 16.4 °C in the north for 4 days even in the lowest atmospheric temperature. The three-month experiment witnessed the increase of average body weight of juvenile sea cucumber from 0.7 to 4.2 g along with its survival rate of 94.8 % and specific growth rate of 1.87 %d⁻¹. This indicates that the passive solar greenhouse has a great potentiality to reduce energy demand of animal houses using electricity or coal in winter.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102494"},"PeriodicalIF":3.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Single pass saltwater disinfection using low voltage electrolysis: Potential implications for aquaculture systems","authors":"Jeffrey William Yuen ,&nbsp;Hei Yuet Sabrina Lam ,&nbsp;Avalon Berry ,&nbsp;Dawson Chalmers ,&nbsp;Ji Yang ,&nbsp;Ju Zhang ,&nbsp;Jason Chun-Ho Lam ,&nbsp;Celia Schunter ,&nbsp;Sophie St-Hilaire","doi":"10.1016/j.aquaeng.2024.102493","DOIUrl":"10.1016/j.aquaeng.2024.102493","url":null,"abstract":"<div><div>Open net pen saltwater aquaculture faces criticism due to the potential transmission of pathogens between fish farms and to wild stocks. To address this issue and improve the sustainability and growth of net pen farming, closed containment farms have been suggested, but the cost and feasibility of disinfecting large volumes of water in these types of farms is problematic. We explored the potential for using electrolysis to disinfect saltwater in a flow-through system with water flow velocities between 47 and 105 cm/s. This was the first step to investigating whether this technology could be applied to saltwater flow-through closed containment systems. Various voltage levels (3.3–9.0 V) were applied to generate chlorine from saltwater. We found the disinfection properties of the system varied with wattage (i.e., voltage × ampere), velocity of water flow over the electrodes, salinity of water, and residual chlorine contact time. Wattage was highly correlated with the production of chlorine, and this relationship was dependent on water flow (<em>p</em> = 0.0398). A slower flow velocity led to higher chlorine concentration, and the effect was more pronounced at higher wattages. Using a zero-inflated negative binomial regression model, we found the probability of full disinfection was increased by increasing wattage (<em>p</em> &lt; 0.001) and the residual chlorine contact time (<em>p</em> &lt; 0.001). The level of disinfection (count model) suggested the number of bacteria in the treated samples was determined by the interaction between wattage and flow (<em>p</em> = 0.0056) and the interaction between wattage and salinity (<em>p</em> &lt; 0.001). The bacterial count was also associated with residual chlorine contact time (<em>p</em> &lt; 0.001). The results of this study, although preliminary and limited in their scale, offering a potential solution for disinfecting large volumes of seawater, which could make closed containment fish farming in the ocean viable for reducing bacterial transmission within a farm and to wild fish stocks.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"108 ","pages":"Article 102493"},"PeriodicalIF":3.6,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}