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Research On Technology Innovation Modes Of Ecological Hi-Value Agriculture

Posted on:2011-11-20Degree:DoctorType:Dissertation
Country:ChinaCandidate:L J LiFull Text:PDF
GTID:1119330332484145Subject:Agricultural Environmental Science and Engineering
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Safety of fluid body and its water environment is an imperative condition for the safety of arable land and agricultural products including food. Based on practical demands of the county-level ecological hi-value agriculture's development, water and air treatment, residential and working sufficiency, production and yield increase and biological safety, this Dissertation, tries to relieve the vicious recycle of speedy increase of 4 inputs as farm chemicals, fertilizers, irrigated water and labor force, apparent low comparative efficiency of cereal production, marginalization of cereal production, disbalance of planting-animal husbandry structure, over-emphasing animal husbandry while despising planting, bump harvest in swine while dropoff in rice caused by the negative efficiency of industrialized agriculture in mid-subtropical areas in China for near 50 years and blind GDP pursuit in recent years. This practice has caused serious pollution of fluid body enviornment by dungs of human being, livestock, foultry and fish with pig dung as main contents and led to vicious cycle which badly affects the safety of water source, arable land food and ecology. This Dissertation, in combination with the comprehensive study of quality field, quality breed and fine methodoloty, and the "planting-three-harvesting-four" bump harvest project, with agricultural ecological process engineering as core technologic means, with combination of six industries as agriculture-forestry-stockraising-tourism-processing and ecological industrial chain with combination and recycling of planting-stockraising-sewage gas-processing as main attention, with landscape ecological planning, recycling system design and biodiversity relationship reconstruction as the core, is dedicated for construction of conceptual/theoretical, methodologic and industrial systems and its core "technological innovation mode", among which, the industrial system mainly contains "4-Constructions" with the safety of agricultural products and sustainable agricultural construction as main body, with intelligent agriculture and hi-value agricultural construction as two wings, and pre-production, mid-production and post-production whole-process clean production and agricultural, industrial and urban waste pollution treatment, including fluid body pollution chain's source control, process hindrance and end-treatment. Its core mission is to realize ecological hi-value utilization of water, soil, live substance, climatic light and heat resources and waste resources; to realize the ecological hi-value production of agricultural products; to realize post-production ecological hi-value processing and marketing; and to create clean hi-efficiency process, flow and equipment to solve the motivation issue of innovation in the ecological process of agricultural industrialization and hi-value orientation and in the fluid body pollution control engineering coupling technology innovation and in the industrial system operational mechanism. The main findings are as follows:(1) Based on three concepts as biodiversity, energy hi-efficiency and full use of substances, urban and rural integration, and fluid environment integration, this Dissertation has put forward the "Ecological-Recycling-Hi-value 3 Stage Theory" and "Ecological Hi-Value Agricultural Technology Innovation Mode" for the development of China's ecological agriculture, defined "Urban-Rural-4-Dimension Pollution" and "Fluid Body Environment System" as the auxiliary new concepts of "Ecological Hi-Value Agriculture". In its application case of "Local Water, Soil and Air Monitoring Corelation Test for Representation and Precision of Drought and Flood Environment Data under the Same Climatic Variable Conditions", monitoring data with atmospheric data as main contents, with soil data as supporting data, with 4S technical integrated system in environmental pollution remote monitoring as reference, can represent the degree of pollution of surface water. Cloud-water pH parameter-oriented methodology in cloud-forming process can be referred to in achieving the parameter orientation of pollutants as SO42-,NO3-,TN,NH3-N etc, S and N in soil, and SO2,NOx and NH3 in atmosphere, including related coefficients in monitoring data of pollutants in water, soil and atmosphere. The phased research findings are in compliance with results carried in authoritative literatures.(2) Practice of "Ecological Hi-Value Agriculture":rice chaff deep processing lab test, pilot test and inositol industrial test".①Design thread:Under fixed production task, select equipment units and optimal flow to minimize the fixed capital and the floating capital investment including environmental cost as energy conversion, consumption reduce, emission abatement and water treatment. The solution can be sought through summarizing it into a Mixed Integer Non-Linear Planning Model (hereinfater called MINLP) via computer. Combining simulated annealing and heuristic method can lead to a fixed optimized algorithm wich can enjoy both global optimum and speed up seeking process of local optimum. This method, compared with strict mathmatic planning method, enjoys the relative error lower than 0.5% and it is deemed as optimal design.②Flow simutation and process design. Adopt material balance equation, energy balance equation and phase balance equation to form a mathetical model which can accurately describe the whole production process to seek solution via computer, so that all information of this process can be acquired. ③Equipment design and comparison between traditional process and ecological hi-value process:Practically proved in two factories respectively in Zhejiang Province and Hebei Province, the capacity of 60 tons/year of inositol project can be optimally designed with autoclave volume as 6m3, among which, the inositol yield (%) can be improved from 6.0%-9.1% in traditional process to 10.0%-12.5% in ecological hi-value process; phytine consumption, which stands for floating capital and accounts for 2/3 of the total cost can be reduced from 17-11 to 10-8t/t inositol; while the hydrolysis autoclave volume which stands for fixed capital and accounts for dominant cost can be reduced from 6.5-4.2m3to 3.8-3.0m3. While when the yield rate reaches 12.5%, the capacity can be expanded to 120t/a.④Enlightenment of trial production:applying production flow simulation software into the key production equipment, whole-flow mathematical simulation, design calculation and production status analysis can help find advanced and reliable hardware and software and lead to whole-flow simplication, and social-economic-ecologic comprehensive efficiency.(3) Constructed the research methodological system including three elements as system science methodology, research mode and detailed mthod technique, of which the essence is 3 items of analysis of the latter, i.e. system simulation analysis, emergy analysis and life cycle analysis.(4) 3 analysis & application cases in construction of Ecological Hi-Value Agriculture's Industrial System and its Technological Innovation Mode:①Soil Formula Fertilizer Application and System Simulation Analysis & Application Case. In the fertilizer-effect model applied in Yuduan Village in 2007, the optimal amount of fertilizer application is respectively 121.50,25.05 and 70.35kg/hm2, the optimal yield is 7378.5 kg/hm; the accumulative amount applied in the whole city is 29.3 thousand hm2, the special NPK fertilizers applied is 10.8 thousand t/a, the organic fertilizers applied is 3t/hm2,0.75t/hm2 increased than those applied hi-carbon fertilizers, saved chemical fertilizers are 13.4 thousand t/a, paddy rice increased at 8 790t/a, at average 0.3t/hm2, total increased amount is RMB16.7456 million/a, RMB 572/hm2 at average.②Cattle-Sewage Gas-Grass Joint-Production Recycling Agricultural Mode and Emergy Analysis Application Case. The result indicates that the efficiency of use of natural resources is increased from 0 to 0.041%; the rate of output of whole-system net energy and the index of sustainable development are respectively 2.11 and 1.03, increased at the rates of 10.5% and 71.05% compared with single cattle raising industry; the load rate of environment is 1.08,18.18% decreased.③Zero-Emission Area Control and Life Cycle Analysis Application Case:Ecological Hi-Value Straw-Made Methanol Project (50,000 t/a). The reduced carbon emission area is set within the searched radium of 50km, straw will not be wasted and burned. Life Cycle Analysis shows that the cost of environment effect is RMB284.99/t of methanol, and is concentrated on the process of production and consumption, among which, the fixed value of net carbon in the planting of paddy rice is minus (RMB-152.79/t methanol), the total environmental effect load is minus (RMB-35.49/t). The actual cost of straw-made methanol is RMB 76.84/t less than coal-made methanol.④Zero Emission Area Control and Clean Development Mechanism (CDM) Case: ICPC-recommended ecological hi-value"Large-Scaled Sewage Gas Power Generation and Ecological Fertilizer" Project introduced in Xiangyin County. With a land of 6.67hm2 used, within the area of searched radium of 3km of organic waste,300t/d dungs of foultry and livestock and 200t/d waste liquid are input, "3 joint-products" of thermal-power-ecological fertilizer take place. Upon anaerobic fermentation, sewage gas produced can produce heat and generate power of 6,000,000 kWh/a, produce 50,000 t/a ecological fertilizers, reduce emission of carbon equivalent at 80000t/a.⑤Merger of super hybrid rice and green super rice and related risk, social-economic-ecological combined efficiency case. Application of transgenosis technology is the development direction of advanced breeding technology, and the major technological solution of reducing 4 inputs as farm chemicals, fertilizers, irrigated water and labor force in great margin and thus improving rice-planting's comparative efficiency. Super hybrid rice is a very good material for transgenosis technology; and the application of transgenosis technology is beneficial to better realizing super-high yield potential in planting super hybrid rice in a large scale. However, scientists cannot foresee the harms of transgenic transformation over live substance, and cannot exclude the occurrence of "live substance enlargement" phenomenon in future, which is an enlightenment of the new concept of "environmental trace pollutants".
Keywords/Search Tags:Ecological Hi-Value Agriculture, Technology Innovation, New Ecological Agricultural Model, Industrial Technology System, Environmental Economic Assessment, System Simulation Analysis, Emergy Analysis, Life Cycle Analysis
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