Aquacultural Engineering最新文献

{"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}

{"title":"Novel and sustainable valorization of biogenic waste into microbial protein based fish dietary ingredient in bioreactor: Process optimization and sustainable utilization","authors":"Thejaswini ,&nbsp;M.H. Chandrakant ,&nbsp;A.M. Babitha Rani","doi":"10.1016/j.aquaeng.2024.102483","DOIUrl":"10.1016/j.aquaeng.2024.102483","url":null,"abstract":"<div><div>Waste valorization is the concept of sustainability, and microbial floc is the valorised product of sustainable aquaculture. It converts nitrogenous waste into nutritious microbial protein that can replace fish meal partially or completely as feed for aquatic animals. The current study focuses on optimizing the process of production of microbial protein using aquaculture waste in a bioreactor and its utilization as feed for genetically improved farmed tilapia (GIFT) reared in inland saline groundwater with various inclusion levels. The retention time, aeration, and microbial flocculant (chitosan) were optimized to intensify the reaction, using a response surface methodology approach based on a full factorial experimental design. The chosen responses for evaluation were crude protein (CP), crude lipid (CL), and floc volume (FV). The interaction between aeration and retention time was found to play a significant role in the percentage of crude protein and crude lipid of microbial floc (p&lt;0.001). The floc volume was significantly influenced by retention time and chitosan concentration (p&lt;0.05). The process was optimized with 4 days of retention time, 30 ppm of chitosan concentration, and intermittent aeration (0.5 hr aeration and 0.5 hr no aeration), which resulted good quality microbial floc with a maximum CP of 24.74 %, a maximum CL of 2.13 %, and a FV of 13.75 ml. A completely randomized design with the inclusion of 0 %, 10 %, 20 %, and 30 % microbial floc (produced in a bioreactor) in feed was followed to evaluate the growth performance of GIFT. Among these, microbial flocs with a 20 % inclusion level showed a good growth trajectory. This study has shown that 20 % microbial floc meal in the diet is optimum for the growth of GIFT in inland saline groundwater. This study sustainably supports the waste valorization concept with microbial protein production in a bioreactor that is a suitable feed for GIFT.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"108 ","pages":"Article 102483"},"PeriodicalIF":3.6,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142703871","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":"Optimizing alkalinity control in recirculating aquaculture systems (RAS): A dynamic modelling approach","authors":"Marie Aline Montjouridès ,&nbsp;Susanna Röblitz ,&nbsp;Håkon Dahle","doi":"10.1016/j.aquaeng.2024.102492","DOIUrl":"10.1016/j.aquaeng.2024.102492","url":null,"abstract":"<div><div>Maintaining good water quality is essential for successful fish production in land-based recirculating aquaculture systems (RAS). Numerous interdependent factors influence water quality parameters, making it difficult to evaluate which operational strategies are most favorable. Mathematical models and model simulations have proven to be powerful tools to evaluate how RAS design and operation are linked to RAS dynamics, but these models rarely implement pH and carbonate species as dynamic variables. Here, we present a dynamic model for RAS (dynRAS) that combines rates of TAN (total ammonia nitrogen) removal, fish growth, and <em>CO</em>₂ and TAN excretion, with a reaction model for pH and the carbonate system formulated based on the law of mass action. A novel aspect of our approach is the incorporation of a dosage system modelled by a Hill-function, enabling the exploration of diverse dosing strategies for pH and alkalinity management. The model was validated based on empirical data from a pilot scale RAS system operated with a feeding regime involving 12 h of feeding per day. We found that model simulations could be used to accurately predict diurnal cycling patterns in RAS water quality parameters. Furthermore, we made use of simulations to assess how diurnal cycling varies with changing pH and alkalinity levels. Model results emphasize the complexity of pH and alkalinity control in RAS in relation to overall water quality management. Based on our simulations, we argue that what should be considered as optimal pH and alkalinity in RAS depends on the state of the system. Accordingly, optimal pH and alkalinity thresholds may vary between different RAS units and between different time points of a rearing cycle. More generally, we demonstrate how modelling and model simulations can be an effective way of getting insights into the dynamics of complex RAS interactions and provide a valuable tool to efficiently explore effects of different operational strategies on water quality parameters.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"108 ","pages":"Article 102492"},"PeriodicalIF":3.6,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702785","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}