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Adaptive spraying decision system for plant protection unmanned aerial vehicle based on reinforcement learning

International Journal of agricultural and Biological Engineering 2022年第4期15卷 16-26页

作者： Ziyuan Hao Xinze Li Chao Meng Wei Yang Minzan Li key laboratory of smart agriculture System Integration Ministry of EducationChina Agricultural UniversityBeijing 100083China key laboratory of agricultural Information Acquisition technology Ministry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing 100083China

To solve the problem of lacking scientific guidance in aerial pesticide application,this study introduced an adaptive spraying decision system(ASDS)for Unmanned Aerial Vehicle(UAV)spraying to guide the operators of plant protection UAVs to set reasonable spraying parameters under complicated *** minimum applied volume rate,proper spraying velocity,spraying height,and initial droplet size were recommended by the *** key factor of the decision system is the decision model of reinforcement learning based on the actor-critic neural *** specific,the field experimental data were used to train the critic and actor networks,which made the model adaptive to optimize the output of spraying *** with the conventional spraying parameters,the spraying parameters recommended by the ASDS had a positive impact on wheat *** decision results of the ASDS showed that the spraying volume rate was lower in the blocks with a small leaf area *** addition,the spraying volume rate for the whole parcel was reduced by 14%.After UAV spraying,the uniformity of the droplet deposition in the ASDS parcel was better than that in the conventional ***,the penetrability of the droplets and the control efficacy for the brown wheat mite Petrobia latens(Muller)were similar in the two *** ASDS can recommend the optimal spraying parameters to minimize pesticide application.

关键词： unmanned aerial vehicle spraying parameters decision reinforcement learning droplet deposition

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HYDRUS-2D simulations of water movement in a drip irrigation system under soilless substrate

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International Journal of agricultural and Biological Engineering 2022年第3期15卷 210-216页

作者： Lei Geng Li Li Wei Li Chengfei Yang Fanjia Meng key laboratory of agricultural Information Acquisition technology Ministry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing100083China key laboratory of smart agriculture System Integration Ministry of EducationChina Agricultural UniversityBeijing 100083Chin

A comprehensive understanding of the distribution and water movement of the substrate in root areas is crucial to the design and management of drip irrigation systems,which is a significant step to maximizing crop water use efficiency by understanding the hydrodynamics in soilless *** this study,an improved HYDRUS-2D model by the dynamic root growth model was used to simulate water movement under the condition of drip irrigation and the water uptake process of the root,and then,compared with the observed *** water content under drip irrigation was also measured with the calibrated ECH20-EC5 *** situation of substrate water movement was analyzed under the conditions of different depths,different initial water content,and different irrigation *** substrate water movement under different drip irrigation conditions was *** results showed that incorporating the defined initial and boundary conditions and the hydraulic characteristics of the substrate into the model enabled HYDRUS model to predict the movement and position of water in unsaturated porous media by solving Richards *** drip irrigation,the substrate wetting body was approximately a quarter ellipse,and the water would continue to move to the area where the wetting front did not reach within 1 h after *** simulation results of the improved HYDRUS-2D model agreed well with those observed by the ECH2O-EC5 sensors,and the model could provide a basis for precision irrigation of soilless substrate culture under drip irrigation.

关键词： drip irrigation HYDRUS-2D substrate water movement soilless substrate

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Interaction of Genotype,Environment,and Management on Organ-Specific Critical Nitrogen Dilution Curve in Wheat

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Plant Phenomics 2023年第3期5卷 612-625页

作者： Bo Yao Xiaolong Wang Yancheng Wang Tianyang Ye Enli Wang Qiang Cao Xia Yao Yan Zhu Weixing Cao Xiaojun Liu Liang Tang National Engineering and technology Center for Information agriculture Engineering Research Center for Smart AgricultureMinistry of EducationKey Laboratory for Crop System Analysis and Decision MakingMinistry of Agriculture and Rural AffairsJiangsu Key Laboratory for Information AgricultureJiangsu Collaborative Innovation Center for Modern Crop ProductionNanjing Agricultural UniversityNanjing 210095JiangsuPR China CSIRO agriculture and Food Cluniess Ross StreetBlack MountainACTAustralia

The organ-specific critical nitrogen(N_(c))dilution curves are widely thought to represent a new approach for crop nitrogen(N)nutrition diagnosis,N management,and crop *** N_(c) dilution curve can be described by a power function(N_(c)=A_(1)·W^(−A2)),while parameters A_(1) and A_(2) control the starting point and *** study aimed to investigate the uncertainty and drivers of organ-specific curves under different *** using hierarchical Bayesian theory,parameters A_(1) and A_(2) of the organ-specific N_(c) dilution curves for wheat were derived and evaluated under 14 different genotype×environment×management(G×E×M)N fertilizer *** results show that parameters A_(1) and A_(2) are highly *** the variation of parameter A_(1) was less than that of A_(2),the values of both parameters can change significantly in response to G×E×*** nutrition index(NNI)calculated using organ-specific N_(c) is in general consistent with NNI estimated with overall shoot N_(c),indicating that a simple organ-specific N_(c) dilution curve may be used for wheat N diagnosis to assist N ***,the significant differences in organ-specific N_(c) dilution curves across G×E×M conditions imply potential errors in N_(c) and crop N demand estimated using a general N_(c) dilution curve in crop models,highlighting a clear need for improvement in N_(c) calculations in such *** results provide new insights into how to improve modeling of crop nitrogen–biomass relations and N management practices under G×E×M.

关键词： Wheat diagnosis starting

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Identification of the flavor profiles of Chinese pancakes from various areas using smart instruments combined with E-noses and E-tongues

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International Journal of agricultural and Biological Engineering 2023年第1期16卷 283-290页

作者： Wei Liu Yue Fan Qiannan Liu Fen Xu Liang Zhang Honghai Hu Institute of Food Science and technology Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products ProcessingMinistry of Agriculture and Rural AffairsBeijing 100193China

In order to reveal the flavor characteristics of Chinese pancakes,the aroma and taste compounds of seven traditional Chinese pancakes were *** results showed that electronic nose(E-nose)analysis with PCA could successfully distinguish the aroma profiles of seven Chinese pancakes;the principal components PC1 and PC2 represented 75.74%and 23.2%of the total variance(98.94%)***,the discrimination index of taste profiles of seven Chinese pancakes based on electronic tongue(E-tongue)analysis with LDA was 99.32%;the discriminant factors DF1 and DF2 represented 94.99%and 4.33%of the total variance ***,GC-MS results demonstrated that thirty-threeﬂavor compounds were identiﬁed in seven Chinese pancakes,including aldehydes,alcohols,alkanes,acids,and *** the flavor components,aldehydes with ROAVs higher than 1 contributed most significantly to the overall aroma,such as(E,E)-2,4-nonadienal present the largest contribution in Qingzhou pancake,Jinan and Yishui pancake;hexanal present the largest contribution in Shenxian and Gaomi pancake;nonanal and benzeneacetaldehyde present the largest contribution in Linqu and Tai’an pancake,*** umami and sweet taste amino acids were the most abundant in all the Chinese pancake samples,and Qingzhou pancake had relatively high amino acid *** content of glucose was higher than maltose in Gaomi,Shenxian,and Tai’an pancakes,whereas the content of maltose was higher than glucose in Linqu,Qingzhou,Jinan,and Yishui *** results indicated that the aroma and taste proﬁles of Chinese pancakes differed significantly in terms of their flavor compound *** presented results could be beneficial for providing a comprehensive method for flavor profile identification of traditional whole-grain-based staples such as Chinese pancakes.

关键词： Chinese pancake flavor profile E-nose E-tongue smart instrument identification

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Light intensity regulates the sexual behaviors of oriental fruit fly Bactrocera dorsalis under laboratory conditions

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农业科学学报:英文版 2023年第9期22卷 2772-2782页

作者： REN Cong ZHANG Jie YUAN Jin-xi WU Yun-qi-qi-ge YAN Shan-chun LIU Wei WANG Gui-rong key laboratory of Sustainable Management of Forest Ecosystem Ministry of EducationNortheast Forestry UniversityHarbin 150040P.R.China Shenzhen Branch Guangdong Laboratory of Lingnan Modern Agriculture/Key Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120P.R.China

The oriental fruit fly,Bactrocera dorsalis(Hendel),is a devastating pest of citrus *** successful mating,adult females insert their eggs into the ripened fruit,resulting in moldy and rotten fruit and causing great economic losses for the citrus *** the field,flies initiate copulatory behaviors as twilight approaches,and decreasing light intensity in this period is the normal stimulus for *** this study,ten light intensities ranging from 0–30000 lux were set to identify the typical intensity that strongly regulates the copulation behavior of *** light intensities found to regulate the copulation behavior were then selected to verify their effects on adult male wing fanning and female chemotaxis towards 2,3,5-trimethylpyrazine(TMP).At last,strong light and complete darkness were artificially combined in the lab to verify whether they could prevent copulation to inform behavioral manipulation of oriental flies in the *** results indicated that adult flies generally initiated copulatory behaviors at low light intensity(<1000 lux).Stronger light significantly prevented copulation in proportion to intensity,with nearly no copulation events initiated when light intensity was above 20000 *** male wing fanning and female chemotaxis towards TMP were attenuated as light intensity became ***,at 10000 lux,males still fanned their wings to a certain extent while TMP completely lost its attractiveness to *** the darkness,adults did not initiate any sexual behaviors,e.g.,copulation,wing fanning,or chemotaxis to *** hour of strong light(10000 lux)combined with continuous darkness completely prevented *** results show that light condition is an essential factor for copulatory behaviors in the oriental fruit *** could thus manipulate light conditions artificially or disrupt the molecular target in flies’light transduction pathway to develop environmentally-friendly techniques to control th

关键词： Bactrocera dorsalis light conditions courtship and mating 2,3,5-trimethylpyrazine

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key variable for simulating critical nitrogen dilution curve of wheat:Leaf area ratio-driven approach

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Pedosphere 2022年第3期32卷 463-474页

作者： Ke ZHANG Jifeng MA Yu WANG Weixing CAO Yan ZHU Qiang CAO Xiaojun LIU Yongchao TIAN National Engineering and technology Center for Information agriculture Nanjing Agricultural UniversityNanjing 210095(China) Engineering Research Center of smart agriculture Ministry of EducationNanjing Agricultural UniversityNanjing 210095(China) key laboratory for Crop System Analysis and Decision Making Ministry of Agriculture and Rural AffairsNanjing Agricultural UniversityNanjing 210095(China) Jiangsu key laboratory for Information agriculture Nanjing Agricultural UniversityNanjing 210095(China) Jiangsu Collaborative Innovation Center for Modern Crop Production Nanjing Agricultural UniversityNanjing 210095(China)

Nitrogen(N)dilution curves,a pivotal tool for N nutrition diagnosis,have been developed using different winter wheat(Triticum aestivum L.)***,few studies have attempted to establish critical nitrogen(N_(c))dilution curves based on the leaf area ratio(LAR)to improve the monitoring accuracy of N *** this study,three field experiments using eight N treatments and four wheat varieties were conducted in Jiangsu Province of China from 2013 to *** empirical relationship of LAR with shoot biomass(expressed as dry matter)was developed under different N *** results showed that LAR was a reliable index,which reduced the effects of wheat varieties and years compared with the traditional *** N nutrition index(NNI)based on the LAR approach(NNI-LAR)produced equivalent results to that based on shoot ***,the NNI-LAR better predicted accumulated N deficit and best estimated the relative yield compared with the other two indicator-based NNI ***,the LAR-based approach improved the prediction accuracy of N_(c),accumulated N deficit,and relative yield,and it would be an optimal choice to conveniently diagnose the N status of winter wheat under field conditions.

关键词： agronomic parameter grain yield leaf area index nitrogen nutrition index nitrogen status nitrogen use efficiency

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Geographical distribution of Aspergillus flavus in peanut harvest period in China

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Oil Crop Science 2023年第2期8卷 127-132页

作者： Xiaohan Liu Jiayun Fu Mingbo Wen Haohua Gu Pingping Ji Xiaofeng Yue Xiaoqian Tang Meijuan Liang Yang Zhou Qi Zhang Peiwu Li Oil Crops Research Institute of the Chinese Academy of agricultural Science WuhanChina key laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture and Rural AffairsWuhanChina key laboratory of Detection for Mycotoxins Ministry of Agriculture and Rural AffairsWuhanChina laboratory of Risk Assessment for Oilseeds Products(Wuhan) Ministry of Agriculture and Rural AffairsWuhanChina Quality Inspection and Test Center for Oilseeds Products Ministry of Agriculture and Rural AffairsWuhanChina

In order to grasp the distribution of Aspergillus flavus in the soil of peanut production areas in China,*** biomarkers were tested on 555 soil samples from 37 sampling points in 17 provinces,peanut fields in four agroecological zones(Southern area,Yangtze River Basin,Northern area,northeast area).The results showed that(1)the cultivation amount of *** per gram of soil in the Yangtze River Basin is 1.30 times that of the southern area,1.56 times that of the northern area,and 6.20 times that of the northeast area,with obvious regional characteristics.(2)In the Yangtze River basin,the change of longitude in the east-west direction has no direct impact on the cultivation amount of *** per gram of soil.(3)In the east coast,the *** cultivated per gram of soil increased first and then decreased with the increase of latitude from south to north.(4)*** can be isolated in the soil samples above 1000 *** pollution is an important source of aflatoxin contamination in *** study on the distribution of *** in soil in China could provide theoretical support for the early warning and prevention and control measures of aflatoxin contamination in peanut.

关键词： Agroecological zones Peanut Aspergillus flavus Distribution Aflatoxin contamination

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Design and Realization of a Novel Hybrid-Drive Robotic Fish for Aquaculture Water Quality Monitoring

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Journal of Bionic Engineering 2023年第2期20卷 543-557页

作者： Yiting Ji Yaoguang Wei Jincun Liu Dong An National Innovation Center for Digital Fishery China Agricultural UniversityBeijing100083China key laboratory of smart Farming Technologies for Aquatic Animals and Livestock Ministry of Agriculture and Rural AffairsChina Agricultural UniversityBeijing100083China Beijing Engineering and technology Research Centre for Internet of Things in agriculture China Agricultural UniversityBeijing100083China College of Information and Electrical Engineering China Agricultural UniversityBeijing100083China

Thunniform swimmers(tuna)have a swinging narrow sequence stalk and a moon-shaped tail fin,which performs poorly at slow speed,higher acceleration and turning *** most cases,faster speed and higher maneuverability are mutually rejection for most marine creatures and their robotic *** paper presents a novel hybrid tuna-like swimming robot for aquaculture water quality monitoring,which interleaves faster speed and higher *** robotic prototype emphasizes on streamlining and enhanced maneuverability mechanism designs in conjunction with a narrow caudal propeller to the *** innovative design endows the robot to easily execute the multi-mode swimming gait,including forward swimming,turning,diving/*** capabilities of our robot are validated through a series of indoor swimming pool and field breeding *** robotic fish can achieve a maximum speed up to about 1.16 m/s and a minimum turning radius less than 0.46 Body Lengths(BL)and its maximum turning speed can reach 78.6∘/*** to its high speed,maneuverability and relatively small size,the robotic fish shed light on intelligent monitoring in complex aquatic environments.

关键词： Hybrid-drive biomimetic robot fish Water quality monitoring Multimodal swimming gait

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Modeling of comprehensive power load of fishery energy internet considering fishery meteorology

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Information Processing in agriculture 2023年第4期10卷 581-591页

作者： Xueqian Fu Tong Gou College of Information and Electrical Engineering China Agricultural UniversityBeijingChina National Innovation Center for Digital Fishery China Agricultural UniversityBeijingChina key laboratory of smart Farming Technologies for Aquatic Animal and Livestock Ministry of Agriculture and Rural AffairsBeijingChina Beijing Engineering and technology Research Center for Internet of Things in agriculture BeijingChina

Accurate calculation for comprehensive power load of fishery energy internet plays a significant role in reasonable using of energy and reducing environmental ***,as fishery power load is of greatly unique meteorology sensitivity,it continues to be a difficult ***,the research of fishery meteorology is an important part of the rational development of fishery resources,the protection of production safety,and the pursuit of high and stable *** paper makes a deep study on the power load of the fishery energy internet under the influence of fishery meteorology and takes onshore fish pond as the research *** of all,the power load is divided into three parts:oxygen enrichment power load,feeding power load,and water replenishment and drainage power *** impact mechanism of fishery meteorology(including temperature,surface wind speed,precipitation,relative humidity,etc.)on it is described,and then the overall power load is obtained through modeling and ***,taking the Yuguang Complementary Project in Zhouquan Town,Tongxiang,Zhejiang Province,China as an example,using the meteorological data of its typical spring day and using the MATLAB tool to solve,the hourly comparison of the three types of power loads,the comprehensive power load demand,the full-day electricity charge forecast and the total annual power consumption are *** annual power consumption per hectare and per kilogram of output calculated by simulation are basically consistent with the order of magnitude of the survey data,which proves the validity of the model *** model established in this paper is an original work,and the exploration of fishery energy internet can draw lessons from it.

关键词： Comprehensive power load Fishery energy internet Meteorology sensitivity Onshore fish pond Modeling and integration

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key technologies and applications of agricultural energy Internet for agricultural planting and fisheries industry

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Information Processing in agriculture 2023年第3期10卷 416-437页

作者： Xueqian Fu Haosen Niu College of Information and Electrical Engineering China Agricultural UniversityBeijingChina National Innovation Center for Digital Fishery China Agricultural UniversityBeijingChina key laboratory of smart Farming Technologies for Aquatic Animal and Livestock Ministry of Agriculture and Rural AffairsBeijingChina Beijing Engineering and technology Research Center for Internet of Things in agriculture BeijingChina

Energy consumption in the agricultural sector is significant,reaching 20%of the total energy consumption in *** Energy Internet,an important extension of Energy Internet in the agricultural field,significantly contributes to agricultural *** technologies of agricultural Energy Internet are vital factors supporting its *** article systematically reviews the key technologies of agricultural Energy Internet for two areas:agriculture and *** working mechanisms and power consumption characteristics of some state-of-the-art new-energy agricultural intelligent equipment are *** addition,the principles and profit methods underlying the agro-industrial complementary operation model are ***,against the agricultural Energy Internet background,the development trends of some state-of-theart new energy agricultural intelligent equipment,agro-industrial complementary,and carbon–neutral technology are proposed in this paper,providing novel perspectives on the promotion of the development of agricultural Energy Internet and related technological innovation *** unmanned farm is the main form of the future agricultural system,which is powered by the agricultural Energy Internet based on smart agriculture and a smart *** will become the inevitable trend of modern agriculture to replace oil agriculture with electric *** electricity in farming is mainly generated by renewable *** energy power generation has low carbon emissions and is the future direction for the development of agricultural energy *** addition,the Internet of Things will be further strengthened to realize automation and intelligence of agricultural energy systems。

关键词： agricultural Energy Internet agricultural equipment agricultural planting Fisheries industry Carbon neutrality

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