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Design and optimization of an airflow-vibration sieving device for the effective cleaning of cyperus esculentus *** mixture

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International Journal of Agricultural and Biological engineering 2024年第4期17卷 77-88页

作者： Shan Chen Shiguan An Za Kan Lidong Huang Hewei Meng Jiangtao Qi Huijie Peng College of Mechanical and Electrical engineering Shihezi UniversityShihezi 832000XinjiangChina engineering research center for production Mechanization of Oasis special economic crop Ministry of EducationShihezi 832000XinjiangChina Guilin Mike machinery Co. LtdGuilin 541000GuangxiChina

The threshing mixture of Cyperus esculentus(Tiger nut)planted in sandy areas is complex during harvesting,and there are problems of high impurity rate and high cleaning loss rate of the *** this paper,the threshing mixture of Cyperus esculentus is taken as the research object,and the suspension speed of each component is measured to design an“airflow+vibration”sieving *** the vector polygon method to explore the law of motion of the vibrating sieve,establish the force model of the seeds on the sieve surface,and analyze the conditions for the seeds to penetrate the *** to the principle of seeds penetrating the sieve and long stalks not penetrating the sieve,the geometric model of sieve blades opening degree adjustment mechanism is *** of the conditions under which long stalks can be thrown out of the *** experiment bench of the cleaning device was built,and the evaluation indexes were the rate of seed impurity and the rate of cleaning loss of the device,and the crank speed,sieve blades opening degree and fan speed were used as the experiment factors to study the influence law of each influencing factor on the evaluation index through single-factor *** response surface methodology to find the optimal combination of working parameters of the cleaning *** verify the device’s application on the combine harvester to improve the effectiveness of the cleaning operation of the Cyperus esculentus combine harvester.

关键词： sand cultivation Cyperus esculentus wind sieve type cleaning device optimization

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Valorization of wheat bran arabinoxylan: A review on nutritional and materials perspectives

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Grain & Oil Science and technology 2024年第3期7卷 196-208页

作者： Muhammad Bilal Dandan Li Chong Xie Runqiang Yang Zhenxin Gu Dong Jiang Xueming Xu Pei Wang College of Food Science and technology Whole Grain Food Engineering Research CenterNanjing Agricultural UniversityNanjing 210095JiangsuChina The Sanya Institute of Nanjing Agricultural University Sanya 572024HainanChina National Technique Innovation center for Regional Wheat production/Key Laboratory of crop Physiology Ecologyand ManagementMinistry of Agriculture/National Engineering and Technology Center for Information AgricultureNanjing Agricultural UniversityNanjing 210095JiangsuChina Key Laboratory of Food Science and technology School of Food Science and TechnologyJiangnan UniversityWuxi 214122JiangsuChina

Wheat bran, a principal byproduct of flour milling, stands as an abundant source of dietary fiber, yet its economic potential remains under-exploited in current forage applications. Arabinoxylan(AX), constituting the core of dietary fiber, emerges as a versatile compound with multifaceted functionalities. Its nutritional significance,coupled with its role in cereal food processing, has prompted a surge of studies focusing on the valorization of wheat bran AX. Moreover, the hydrolyzed derivative, arabinoxylan oligosaccharides(AXOS), demonstrates prebiotic and antioxidant properties, offering potential avenues to mitigate the risk of chronic diseases. This review summarizes current knowledge on the valorization of wheat bran AX in terms of the processing and nutritional properties of AX. Moreover, multiple novel applications of AX in the materials area, including biodegradable food packaging films, delivery of bioactive substances as nanoparticles, and the manufacture of food emulsifiers, are also highlighted to extend the utilization of AX. This review underscores the immense potential of wheat bran AX, advocating for its exploitation not only as a nutritional asset but also as a primary ingredient in advanced materials. The synthesis of nutritional and materials perspectives accentuates the multifaceted utility of wheat bran AX, thereby paving the way for sustainable valorization pathways. By unraveling the latent potential within AX, this paper advocates for the holistic and sustainable utilization of wheat bran in diverse, value-added applications.

关键词： Wheat bran Arabinoxylan Nutrition Biodegradable films Nanoparticles Food emulsifiers

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crop pest image recognition based on the improved ViT method Author links open overlay panel

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Information Processing in Agriculture 2024年第2期11卷 249-259页

作者： Xueqian Fu Qiaoyu Ma Feifei Yang Chunyu Zhang Xiaolong Zhao Fuhao Chang Lingling Han 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

The crop pests and diseases in agriculture is one of the most important reason for the reduction of bulk grain and oil crops and the decline of fruit and vegetable crop quality,which threaten macroeconomic stability and sustainable ***,the recognition method based on manual and instruments has been unable to meet the needs of scientific research and production due to its strong subjectivity and low *** recognition method based on pattern recognition and deep learning can automatically fit image features,and use features to classify and predict *** study introduced the improved Vision Transformer(ViT)method for crop pest image *** them,the region with the most obvious features can be effectively selected by block *** self-attention mechanism of the transformer can better excavate the special solution that is not an obvious lesion *** the experiment,data with 7 classes of examples are used for *** can be illustrated from results that this method has high accuracy and can give full play to the advantages of image processing and recognition technology,accurately judge the crop diseases and pests category,provide method reference for agricultural diseases and pests identification research,and further optimize the crop diseases and pests control work for agricultural workers in need.

关键词： crop diseases recognition Fruit tree leaf disease Vision Transformer Deep learning Computer Vision

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Review of the application of in-situ sensing techniques to address the tea growth characteristics from leaf to field

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International Journal of Agricultural and Biological engineering 2024年第1期17卷 1-11页

作者： Qiong Cao Chunjiang Zhao Ze Xu Ping Jiang Haibin Yang Xiangyu Meng Guijun Yang Information technology research center Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China College of Machnical and Electrical engineering Hunan Agricultural UniversityChangsha 410125China Tea research Institute of Chongqing Academy of Agricultural Sciences Chongqing 400000China

The tea plant is a valuable and evergreen crop that is extensively cultivated in China and many other ***,there is growing research interest in this *** the tea industry,it is crucial to develop rapid and non-invasive methods to evaluate tea plants in their natural *** article provides a comprehensive overview of non-invasive sensing techniques used for in-situ detection of tea *** topics covered include leaf,canopy,and field-level assessments,as well as statistical analysis techniques and characteristics specific to the ***-invasive testing technology is primarily used for monitoring and predicting tea pests and diseases,monitoring quality,and nutrients,determining tenderness and grade,identifying tea plant varieties,automatically detecting,and identifying tea buds,monitoring tea plant growth,and extracting tea garden areas through remote *** also helps to evaluate planting suitability,assess disasters,and estimate ***,the article examines the challenges and prospects of emerging techniques aimed at resolving the in-situ detection problem for tea *** can assist researchers and producers in comprehensively understanding the tea environment,quality characteristics,and growth process,thereby enhancing tea production quality,and fostering tea industry development.

关键词： non-destructive in-situ detection tea plants growth characteristics sensors

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Cotton stalk restitution coefficient determination tests based on the binocular high-speed camera technology

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International Journal of Agricultural and Biological engineering 2022年第4期15卷 181-189页

作者： Bingcheng Zhang Xuegeng Chen Rongqing Liang Jiali Li Xinzhong Wang Hewei Meng Za Kan College of Mechanical and Electrical engineering ShiHezi University Shihezi 832000XinjiangChina School of Agriculture engineering Jiangsu University Zhenjiang 212013JiangsuChina engineering research center for production Mechanization of Oasis special economic crop Ministry of EducationShihezi 832000China

The restitution coefficient(RC)of cotton stalks is an important elementary physical parameter that is required to establish the crushing mechanical model and research the film residue separation *** this study,the calculation method of restitution coefficient considering the rotation motion of stalk-shaped agricultural materials was derived based on the principle of kinematics and the energy restitution coefficient method,and a test bench for measuring the RC was designed and *** effects of collision material,moisture content,length,diameter,release height,and collision angle respectively on the RC were investigated by single-factor experiments and orthogonal experiments,and the regression models between influence factors and the RC were *** results showed that Q235 showed the highest value of the RC,and it was followed by cotton stalks and soil lumps,*** RC of cotton stalks decreased with the increase of moisture content and diameter,while it increased at first and then decreased with the increase of *** the release height was less than 500 mm,the RC increased with the increased release *** the collision angle was less than 40°,the RC showed a linear increasing *** significance of the effects of factors on RC decreased with the following sequence:collision angle,length,release height,diameter,and moisture ***,collision angle,and release height were extremely *** contrast test results showed that the values based on Newton’s restitution coefficient method were smaller than that based on the energy restitution coefficient *** verification test showed that the predicted rebound height of cotton stalks calculated based on the energy restitution coefficient method was closer to the actual rebound height,and the relative error was less than 5%.

关键词： high-speed camera technology cotton stalk collision restitution coefficient determination test

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Design and test of a multi-edge toothed cutting device for membraneimpurity mixed material

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International Journal of Agricultural and Biological engineering 2023年第2期16卷 73-84页

作者： Rongqing Liang Bingcheng Zhang Xuegeng Chen Hewei Meng Xinzhong Wang Congju Shen Yaping Li Za Kan College of Mechanical and Electrical engineering ShiHezi UniversityShihezi 832000XinjiangChina School of Agriculture engineering Jiangsu University Zhenjiang 212013JiangsuChina engineering research center for production Mechanization of Oasis special economic crop Ministry of EducationShihezi 832000XinjiangChina College of Energy and machinery Dezhou UniversityDezhou 253023ShandongChina

As the existing residual film crushing device in Xinjiang cannot directly crush membrane-impurity mixed material,by analyzing the compressive and cutting force characteristics of residual film material layer and cotton stalk,the cutting conditions of mixed materials were obtained,and the method of cutting was determined.A multi-edge toothed cutters was created,and a cutting device was *** was preliminarily determined that the number of teeth in the cutters was 8,the clearance between the teeth and between the tooth and fixed blade was 3 mm,the speed of the high-speed cutter was 800 r/min,and the speed difference between the high-and low-speed cutters was-300 r/*** results show that the ratio of residual film to total residual film sampling mass was(2.22±0.30)%,(19.19±2.02)%,(58.94±3.19)% and(20.65±2.05)%,respectively,when the maximum outer profile size in the range of[0,20)mm,[20,100)mm,[100,500)mm and[500,~)*** mass of cotton stalks with lengths of[0,50)mm,[50,100)mm and[100,~)mm accounted for(32.57±1.5)%,(27.77±1.3)%and(39.66±1.75)%,respectively,and the cutting power consumption was(85.41±15.63)*** test results can provide a basis for the subsequent membrane-impurity mixed material cutting technology,as well as some guidance for the separation of it.

关键词： Multi-edge toothed cutter membrane-impurity mixed material cutting device cutting conditions

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Calibration and test of the contact parameters for chopped cotton stems based on discrete element method

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International Journal of Agricultural and Biological engineering 2022年第5期15卷 1-8,F0003页

作者： Rongqing Liang Xuegeng Chen Bingcheng Zhang Xinzhong Wang Za Kan Hewei Meng College of Mechanical and Electrical engineering Shihezi University Shihezi 832000XinjiangChina engineering research center for production Mechanization of Oasis special economic crop Ministry of EducationShihezi 832000XinjiangChina School of Agriculture engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

In view of the fact that the existing cotton stem simulation models are simplified and have a large discrepancy from the actual appearance and the contact parameters have not been *** this study,the simulation model and numerical simulation were established using the discrete element software *** a second-order response model between contact parameters and repose angle had been *** test result showed that the static friction coefficient,rolling friction coefficient,and coefficient of restitution between cotton stems were crucial factors affecting the repose *** determination coefficient corrected determination coefficient and p-value of the second-order response model were R^(2)=0.959,R^(2)_(adj)=0.921,and p<0.0001 *** error values of the comparison between the simulation test results and the corresponding physical test values were all less than 10%,which showed that the model was reliable and had high interpretation and predictability,this study can provide a certain theoretical basis and data support for the setting of contact parameters in the data simulation of cotton stem harvesting and processing,mechanically-harvested film residue crushing and film stem separation,etc.

关键词： discrete element method cotton stem repose angle contact parameters calibration

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Ovule number as a rising star for regulating seed yield: Hope or hype

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Journal of Integrative Agriculture 2024年第11期23卷 3623-3640页

作者： Shahid Ullah Khan Ahmad Ali Sumbul Saeed Yonghai Fan Ali Shehazd Hameed Gul Shah Fahad Kun Lu Integrative Science center of Germplasm Creation in Western China (Chongqing) Science City and Southwest University College of Agronomy and BiotechnologySouthwest University engineering research center of South Upland Agriculture Ministry of Education Women Medical and Dental College Khyber Medical University National Key Laboratory of crop Genetic Improvement Huazhong Agricultural University School of Environment and Science Griffith University College of Agronomy and Biotechnology Southwest University Department of Agronomy Abdul Wali Khan University Mardan Department of Natural Sciences Lebanese American University

Rapeseed(Brassica napus L.) is the second most widely grown premium oilseed crop globally, mainly for its vegetable oil and protein meal. One of the main goals of breeders is producing high-yield rapeseed cultivars with sustainable production to meet the requirements of the fast-growing population. Besides the pod number, seeds per silique(SS), and thousand-seed weight(TSW), the ovule number(ON) is a decisive yield determining factor of individual plants and the final seed yield. In recent years, tremendous efforts have been made to dissect the genetic and molecular basis of these complex traits, but relatively few genes or loci controlling these traits have been reported thus far. This review highlights the updated information on the hormonal and molecular basis of ON and development in model plants(Arabidopsis thaliana). It also presents what is known about the hormonal, molecular, and genetic mechanism of ovule development and number, and bridges our understanding between the model plant species(A. thaliana) and cultivated species(B. napus). This report will open new pathways for primary and applied research in plant biology and benefit rapeseed breeding programs. This synopsis will stimulate research interest to further understand ovule number determination, its role in yield improvement, and its possible utilization in breeding programs.

关键词： Brassica napus ovule number genetics ovule development hormonal signaling

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Developing Situations of Tea Plucking Machine

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engineering（科研） 2014年第6期6卷 268-273页

作者： Yu Han Hongru Xiao Guangming Qin Zhiyu Song Wenqin Ding Song Mei Graduate School Chinese Academy of Agricultural Science Beijing China production machinery engineering and technology research center of special economic crop Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture Nanjing China

To acquire the developing trend and ways of mechanization of tea plucking, with analyzing the developing backgrounds and situations of tea plucking machine both at home and abroad, this paper obtains the conclusion that there are several countries that have conducted a lot of studies on tea plucking machine, such as Japan, England, France, India, Australia and Argentina. Among others, Japan goes ahead, where lots of researches have been conducted in the highest developing level. The article also analyses the reason why China has a poor mechanization of tea plucking and points out existing problems. Finally, some advices and measures for developing Chinese domestic mechanization of tea plucking are given.

关键词： Tea Plucking Machine Development New Techniques Suggestion

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Biochar-mediated Cd accumulation in rice grains through altering chemical forms,subcellular distribution,and physiological characteristics

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Biochar 2023年第1期5卷 830-843页

作者： Le Chen Lin Guo Qiangqiang Xiong Ping Liao Xueyun Deng Xiaohua Pan Xueming Tan Xiaobing Xie Qigen Dai Hui Gao Haiyan Wei Yongjun Zeng Hongcheng Zhang Jiangsu Key Laboratory of crop Genetics and Physiology and Jiangsu Key Laboratory of crop Cultivation and Physiology and Jiangsu Co-Innovation center for Modern production technology of Grain crops and research Institute of Rice Industrial engineering technology Yangzhou UniversityYangzhou 225009China Ministry of Education Key Laboratory of Crop PhysiologyEcology and Genetic BreedingJiangxi Agricultural UniversityNanchang 330045China

Biochar can change the availability and morphology of soil ***,the influence of biochar on Cd chemical form and subcellular fraction in rice is poorly understood,particularly under different irrigation methods.A pot experiment of biochar application combined with two irrigation methods(continuous flooding and intermittent irrigation,CF and Ⅱ)was *** Cd accumulation,chemical form and subcellular fraction in rice organs and the associated physiological responses were *** significantly reduced soil available Cd(30.85-47.26%and 32.35-52.35%)under CF and Ⅱ but increased the Cd content(30.4-63.88%and 13.03-18.59%)in brown ***,the Cd content in shoots/grains under Ⅱ was higher than that under *** elevated the Cd soluble fraction in roots while lowered the cell wall fraction under both irrigation methods,whereas the opposite result was observed in *** increased water-,ethanol-,and NaCl-extractable Cd in roots meanwhile increased ethanol-extractable Cd in leaves under both irrigation ***,the total amount of water-,ethanol-,and NaCl-extractable Cd in rice roots was higher under Ⅱ than under *** hormones and antioxidant enzymes may also be involved in biochar-mediated Cd accumulation in rice ***,changes in Cd chemical form and subcellular fraction in the root and leaf are the main mechanisms of biochar-induced rice grains Cd accumulation.

关键词： Biochar Rice Cd accumulation Chemical forms Subcellular distribution Endogenous hormone Antioxidant enzyme

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