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《农业机械学报》2005,(1)
The Institute of Mechanical Science and Engineering of Jilin University consistsoffivedepartments andGovernment Teaching Base of Mechanical Foundation:Department of Machinery Manufacture &Automation,Department of Machinery Design & Automation,Department of Mechanical and ElectricalEngineering,Department of Engineering Mechanics,Department of Industrial Engineering.TheGovernment Teaching Base contains Engineering and Computer Graphics,Mechanical Mechanism,MachineDesign and Experi… 相似文献
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《农业机械学报》2005,(2)
The Institute of Mechanical Science and Engineering of Jilin University consistsoffivedepartments andGovernment Teaching Base of Mechanical Foundation:Department of Machinery Manufacture &Automation,Department of Machinery Design & Automation,Department of Mechanical and ElectricalEngineering,Department of Engineering Mechanics,Department of Industrial Engineering. TheGovernment Teaching Base contains Engineering and Computer Graphics,Mechanical Mechanism,MachineDesign and Exper… 相似文献
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《农业机械学报》2004,(4)
The College of Mechanical and Electronic Engineering( MEE) was first founded in1 95 9,as Depart-ment of Agricultural Mechanics,which changed its name as Department of Agricultural Engineering in1 990 ,then Institute of Engineering and Technology in 1 994and finally College of Mechanical and ElectronicEngineering in2 0 0 0 respectively.Now there are60 staffsin the college including9professors and1 4associ-ate professors,and 73% of them have degrees of M.Eng.or Ph.D.With 4specialities f… 相似文献
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《农业机械学报》2004,(2)
The College of Engineering and Technology in Hu'nan Agricultural University was named AgriculturalMachinery Department when founded in 1 95 8,renamed as Agricultural Engineering Department in 1 984,and given the currentname in 1 994.The college has eight teaching and researching sections,including Mechanical Design Section,Metalwork Section,Electrical Engineering Section,Agricultural Machinery Section,Automobile andTractor Section,Water Conservancy and Electrical Engineering Sectio… 相似文献
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《农业机械学报》2005,(8)
JinhuaCollegeofProfessionandTechnologywasfirstfoundedin1994andwasgrantedasoneofthe keystate-levelconstructingcollegesin2003.Itisacomprehensiveandfull-timehighervocationalcollege,boastingwiththesubjectsofengineering,agriculture,medicine,economics,management,literature,pedagogyandarts.Thecollegeconsistsof12subordinateinstitutesofInformationEngineering,ElectromechanicalEngineering,ArchitecturalEngineering,GeneticEngineering,TradeandEconomy,Pedagogy,Medicine,Tourism,Arts,MaterialsandChemica… 相似文献
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《农业机械学报》2003,(3)
The College of Engineering and Technology at Huazhong Agricultural University was set up on thebasis of the former Departmentof Agricultural Engineering in1 997under the ratification ofthe Ministry ofAgriculture.The college now has 71 staff members including 6professors,2 3associate professors,and 2senior engineers.Two of them won the award of the young and middle aged experts with outstandingachievements and1 2 were awarded the special allowance.Among all the academic staff,5 1 % ( 2 3) h… 相似文献
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Gideon Sinai 《Irrigation and Drainage Systems》2011,25(4):197-214
Three parameters were introduced here, in the second paper of the series, to evaluate layout structure of multi-quality water supply networks for irrigation. The first parameter was flexibility, which assesses the capability for a flexible supply of variable water quality values which can be obtained by dilution inside the network facilities. The second was separability which expresses the capability of the network to be divided into separate isolated sub-networks, each carrying a different water quality. The third was rigidity, which expresses a rigid allocation of one to one source?Cconsumer connections. Five types of network layout which were presented in Sinai (2011) were evaluated here, using these three parameters. The flexibility of a network was given special attention with the example of parallel and serial connection of fields to sources. A real example of a proposed network in the Hazeva region in Israel was analyzed. All feasible flow patterns (FFPs) were computed. The location of mixing and dilution junctions and computation of the QC feasibility domains were found and computed for every junction and consumer. Relative ranges of discharges and concentrations were conducted for all the FFPs found. However, no single optimal FFP with maximal flexibility was found. Therefore the FFPs were arranged in operational groups for possible sequential operation according to irrigation schedules. 相似文献
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《农业机械学报》2002,(3)
Qingdao University( QU) ,one of the key comprehensive universities of Shandong Province,wascombined by former Qingdao University,Shandong Textile Engineering Institute,Qingdao MedicalCollege and Qingdao Teachers'College in 1 993. Nearly covering all the fields ofliberal arts,history,law,economics,management,science,technology,medicine,and education,5 1 undergraduate and42 graduate( master and doctorate) academic programs are offered by QU now for2 2 ,0 0 0 students( 62 0 graduatestudent… 相似文献
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《农业机械学报》2003,(5)
Agricultural and Biosystems Engineering Discipline of Zhejiang University was a keydiscipline of the National “985”Program.This discipline currently has52 faculty members,including 1 Academician of Chinese Academy of Engineering,1 6professors,and 1 3 Ph.D.student supervisors. Our discipline has many well-equipped labs,including a Key Open ResearchL ab of Agriculture Ministry of China,and some experimental bases forteaching and researching.In the recent3 years,over1 3 0 research proje… 相似文献
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【Objective】The physiological development of tomato is affected by a number of integrative abiotic and biotic factors and the purpose of this paper is to investigate how irrigation with biogas slurry alerts the yield and fruit quality of greenhouse tomato.【Method】The experiment was conducted in a greenhouse from autumn in 2017 to spring in 2018 by irrigating the tomato with a mixture of fresh water and biogas slurry at volumetric ratio of 1∶8, 1∶6 and 1∶4 at flowering stage and fruit-elongation stage respectively. In each treatment, we measured growth, yield, and fruit quality of the tomato, as well as the dynamics of total nitrogen in the root zone. 【Result】The tomato growth was positively related to the biogas slurry ratio at significant level, and the 1∶6 and 1∶4 ratio gave the highest total dry matter at the flowering stage and the fruit expansion stage respectively. The 1∶6 treatment gave the best return, and compared to CK (without biogas slurry), it increased the return by 12.93% in autumn and 12.31% in spring respectively. Irrigating with 1∶4 ratio at fruit elongation stage gave the highest yield, and compared to CK, it increased the yield by 26.59% in autumn and 27.71% in spring respectively. The 1∶4 treatment gave 4.32% increase in yield compared to chemical fertilizer application in spring. T5 and T6 treatments improved soluble sugar and solid, as well as and sugar-acid ratio, while T2 and T3 treatments increased titratable acid and vitamin C content.【Conclusion】Irrigation by mixing biogas slurry and freshwater at 1∶6 and 1∶4 volumetric ratio at flowering-fruiting stage and fruit expansion stage can considerably improve yield and quality of tomato. © 2019 Authors. All rights reserved. 相似文献
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Peter E. Holm Helle Marcussen Anders Dalsgaard 《Irrigation and Drainage Systems》2010,24(1-2):127-142
Non-treated wastewater is used for irrigation of aquatic food production systems in the peri-urban areas of the major cities in Southeast Asia. This paper complement the knowledge on agricultural soil-based crops irrigated with low quality water, by reviewing the research findings on the wastewater-fed aquatic productions with special focus on heavy metals and other potentially toxic elements (PTEs) in the production systems of Hanoi in Vietnam and Phnom Penh in Cambodia. In Hanoi, sediments in the wastewater exposed rivers of Hanoi were reported to be polluted with PTEs, in particular with Cadmium (Cd). The river sediment had a high retention capacity for PTEs which seems to prevent the transport of PTEs to the wastewater-fed production systems. In Phnom Penh, domestic and industrial wastewater is pumped into the Cheung Ek Lake located south of the city. A major part of the water spinach (Ipomoea aquatica Forssk.) consumed in the city is produced in the lake. The concentrations of some PTEs were elevated at the wastewater inlets to the lake compared to concentrations at the lake outlet and at the control site. Water spinach is by far the major vegetable produced in the wastewater-fed systems in Hanoi and Phnom Penh, but did only contain PTEs in concentrations within or slightly above the concentration range observed for water spinach grown in agricultural soil not exposed to wastewater. PTE concentration in fish grown in wastewater-fed systems in Hanoi and Phnom were low. However, mean PTE concentrations in liver and skin of some fish were high. Consumption of muscle tissue from fish produced in wastewater-fed systems in Hanoi and Phnom Penh resulted in an estimated intake of PTEs amounting to less than 9% of the tolerable intake. It was concluded, that the PTE concentrations in fish and water spinach from Hanoi and Cheung Ek Lake in Phnom Penh constituted low food safety risks for consumers. 相似文献
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B. Basile J. Girona M. H. Behboudian M. Mata J. Rosello M. Ferré J. Marsal 《Irrigation Science》2012,30(5):397-406
Adoption of water-saving irrigation strategies is necessary especially for grapevine that has the highest acreage of any fruit crop in the world. We applied deficit irrigation to Chardonnay wine grape at the following phenological stages: anthesis to fruit set, fruit set to veraison, and veraison to harvest. Four irrigation levels (0, 25, 50, and 100?% of crop evapotranspiration, ET c ) were applied in 2009. Vines grown in large containers were used to enable imposition of water stress early in the growing season. The following parameters were measured: midday leaf water potential, vine growth, yield, and quality of must and wine. The same parameters were measured in 2010 although all vines were fully irrigated. The 0 and 25?% treatments caused defoliation and had negative impacts on yield and wine quality in both 2009 and 2010. Chardonnay was most sensitive to water stress in post-veraison in terms of productivity and wine quality. 相似文献
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K. Palanisami Ruth Meinzen-Dick Mark Giordano Barbara Van Koppen C. R. Ranganathan 《Irrigation and Drainage Systems》2011,25(3):121-134
Irrigation tanks in India are common property resources. Tanks provide not only for irrigation, but also forestry, fishing,
domestic water supply, livestock, and other uses. Using empirical results from a study of tank performance from 80 tanks in
Tamil Nadu, South India in two time period: 1996-97 and 2009-10, this paper evaluates tank irrigation system performance in
terms of economic output and revenue generation forirrigation and other uses. The results indicate that irrigation and other
productive uses put together raised the total value of output at tank level by 12 % in 1996-97 and just 6 % in 2009-10. This
may suggest that tank multiple use values are small and getting smaller, and therefore not worth consideration. However, it
was also found that, while declining in absolute terms, non-irrigation uses provided the majority of tax revenues and still
more than cover government's operation and maintenance expenditure (O&M) budget. This finding provides another reason to consider
multiple use values and their linkage with overall system viability. 相似文献
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The effects of multiple irrigation regimes on the relationships among tree water status, vegetative growth and productivity within a super-high-density (SHD) “Arbequina” olive grove (1950 tree/ha) were studied for three seasons (2008–2010). Five different irrigation levels calculated as percentage of crop irrigation requirement using FAO procedures (Allen et al. in Crop evapotranspiration. Guidelines for computing crop water requirements. Irrigation and drainage paper 56. FAO, Rome, 1998) were imposed during the growing season. Periodically during the growing season, daytime stem water potential (Ψ STEM), inflorescences per branch, fruits per inflorescence and shoot absolute growth rate were measured. Crop yield, fruit average fresh weight and oil polyphenol content were measured after harvest. The midday Ψ STEM ranged from ?7 to ?1.5 MPa and correlated well enough with yield efficiency, crop density and fruit fresh weight to demonstrate its utility as a precise method for determining water status in SHD olive orchards. The relationships between midday Ψ STEM and the horticultural parameters suggest maintaining Ψ STEM values between ?3.5 and ?2.5 MPa is optimal for moderate annual yields of good quality oil. Values below ?3.5 MPa reduced current season productivity, while values over ?2.5 MPa were less effective in increasing productivity, reduced oil quality and produced excessive crop set that strongly affected vegetative growth and fruit production the following season. On the basis of the result given here, irrigation scheduling in the new SHD orchards should be planned on a 2-year basis and corrected annually based on crop load. Collectively, these results suggest that deficit irrigation management is a viable strategy for SHD olive orchards. 相似文献