农业资源与环境专业(共42张PPT).pptx
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1、第八章第八章 农业资源利用与粮食安全农业资源利用与粮食安全培训专用第八章 教学目的弄清粮食安全的基本涵义与保障措施了解粮食安全与农业资源利用的关系熟悉农业生态建设与粮食安全的关系培训专用Section 1 The great strategic significance for ensuring our national food safety培训专用Food safetyFood quantity safetyFood quality safety Safety of food sustainable production capabilityThe basal standard of fo
2、od quantity safetyThe safety standards of food without toxic and hazardous materials,or the poisonous substances content dose not exceed specified standardsindicating food productive resource,environmental and ecological safety,i.e.ensuring food safety of quality and quantity,there ought to be corre
3、sponding resource,environmental and ecological safety as guarantee(Extensive meanings)(Extensive meanings)(Narrow meanings)一、一、Summarization of food safety培训专用二、二、The important significance for ensuring our national food safety1.Living significance Enhancing life-qualityEdible safety,Nutrition,High
4、quality food,guarantee peoples life safety and life-quality2.Economic significance enhancing economic income Maintaining food safety and upgrading food quality are of great advantage to promote international export trade,enhance economic returns of state,enterprises and farmers.培训专用3.Ecological sign
5、ificance Improving ecological environmentFirstly,making every effort to reduce the application of chemical fertilizer,pesticide,herbicide to farmland,which.can not only reduce agricultural products pollution,but also decrease atmosphere,water and soil pollution,and play great importance in protect b
6、iodiversity;Secondly,practising cleaner production in all steps and non-production for pre-productionduring productionpost production,going to the way“Cyclic Economy”;Thirdly,protecting ecological environment,namely protect the capability of food sustainable production.培训专用4.Social effect maintainin
7、g social stability“Food be god to the people,safety take priority of food”.“Well fed,well bred”(food quantity safety)、)、“be well fed”(food quality safety)and“eating healthy”(safety of the capability of sustainable production),),people can live and work in peace and contentment,settle down to produce
8、.society can be safety,stabilization.the world can be peaceful and tranquility.培训专用5.Political significance nationlong period stabilityInternational aspect:our nation is a developing agricultural great Power.ensuring food quantity safety is the political needs of defending state sovereignty and safe
9、ty,insteading of another countrys control in the international.Domestic aspect:only food quantity,food quality and the capability of sustainable production all have safety control,it will be in favor of long period stability of our nation.培训专用Section 2 Chinese food safety confronted with austerity c
10、hallenge培训专用qFood quantity insufficient,qualification rate not high;qResidue high level of toxic and hazardous materials in food,many food poisoning incidents;qResource,ecological,environmental problems are highlight,the capability of food sustainable production confronted with potential threat.qlaw
11、 and regulations of food safety imperfect,their executing and supervision force inadequatly.Our national food safety facing main problems培训专用1.Food quantity insufficient On the whole,since the Peoples Republic of China founded for 58yr,dress warmly and ear ones fill problem of people of the whole co
12、untry have solved basically,food quantity is no longer the principal problem,but we must have a notice of:(1)Big differenceCompared with developed country;(2)Slow increasingOur country per grain level did not increase for 18 years,had decreased to the lowest value in 2003;(3)Many difficultiesConflic
13、ts increasing apparently,including between human and land,human and food.培训专用2.Qualification rate not high Our countryfood sanitation average qualification rate was 61.5 in 1982,reached to 88.6 in 2001,this is a great progress by himself;But compared to international levels,still existing many probl
14、ems。In 2000,our countryagricultural ministry reported that exceed standard rate of pesticide residue in 130 vegetables and 10187 fruits samples was 19 in china;In 2001,two sampled results of quality inspect general burear showed that pesticide residue qualification rate only were 72.and 64.5,especia
15、lly organic phosphorus pesticide residue problem.3.Residue level of toxic and hazardous materials in food high 培训专用4.Appearing many food poisoning incidents,badly endanger social stabilityFood poisoning incidents have increased in our country for nearly many years,which badly damaged peoplelife and
16、wealthAccording to publication data of health ministry from 1998 to 2004,existing 1896 food poisoning incidents,73534 poisoning persons,1254 death toll,amounted to 271 incidents per year,10505 poisoning persons,179 death toll,producing badly sequel.Table 1?培训专用YearsPoisoning incidentspoisoning perso
17、nsDeath toll19985558388819999749991032000150627315020017062219318420021287126138200337912876323200438114229268Total1896735341254Average27110505179Table 1.Food poisoning incidents(19982004)培训专用Very standing out resource,ecological,environmental problems have threaten food sustainable production capab
18、ility in our country.Plowland acutely decreasing Water and soil loss severityBiodiversity decreasingEnvironmental pollution pricking upNatural calamityFrequency high5.Resource,ecological,environmental problems are highlight,the capability of food sustainable production confronted with potential thre
19、at培训专用Plowland resourceacutely decreasing At present,plowland amounts in our country is not enough.In 2004 per capita plowland was only 0.095 hm2。Our country decreased 4.6667 million hm2 good plowland area in 10 years,which lost over 400 million tons grains,accounted for 10 of total food production.
20、培训专用Water and soil loss severityChina is one of the most bad countries in water and soil loss.Now,water and soil loss areas reach to 3.67 million hm2 in chna,account for 38.2of total country,and increase at the 10000000 hm2 speed rate per year.The severity of water and soil loss make china loss 50 h
21、undred million tons surface soils,bring out lots of N、P、K nutrition elements.培训专用Environmental pollution pricking upAir pollution水质污染水质污染Air pollution and acid rain stimulatingly took place in many province and city.China is the third acid rain area in the world.There were 14 badly polluted rivers a
22、nd 54 polluted rivers in 78 main rivers in china.At present,plowland areas polluted by Cd、As、Cr、Pb etc heavy metal elements reach 20 million hm2,account for 20%of total cultivated lands。water pollutionSoil pollution培训专用Biodiversity decreasing40005000 advanced plant species accounted for 1520of total
23、 plant species are in severe danger.It was reported that 354 wild plants and 258 wild animals were extinct status.740 world endangered species in Convention on International Trade in Endangered Species of Wild Flora and Faunawas listed,189 species belong to our countrys and account for 25%of it。培训专用
24、Natural calamityFrequency highChina is the best serious country for natural calamity.Natural calamity directly or indirectly produce disadvantage effect to food sustainable production ability.In 2004 natural calamity made 2250 persons death in china,1.55 million houses broke down,3.71 million hm2 fa
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