graziery 中文意思是什麼

Porcine rotavirus ( prv ) belongs to the family reoviridae. it is one of the major pathogens of diarrhea in piglets and causes a major health worldwide in graziery. infection of prv is also prevalent in china, in some area the infectious ratio of piglets is 72 %

豬輪狀病毒（ porcinerotavirus ， prv ）是呼腸孤病毒科輪狀病毒屬的成員，是引起仔豬病毒性腹瀉的主要病原之一，給世界各地的畜牧業造成嚴重的經濟損失。

The thesis is based on income question, forest coverage rate and grop production. to beging with, date envelopment analysis is proved that it can be applicated into grain for green in shan - bei district, and then in view of the fact, seven esential factors which have influence on the project are found out : expense of dam, expense of crop, expense of cash tree, expense of defense tree, other economic crop, expense of grass and graziery ; and the output factors include : income of gdp, pure income per captia, the area of decreasing land loss, graziery income, crop production, income of tree, the totle income of economic crop. after the date of each facts are puted into dea model, unefficiencial decision making units ( dmu ) found. the data that are got through adjusting unefficiencial dmus dy dea can offer guide in shanbei district upgrading of an industrial structure. at the same time, taking into account some possible problems in or after grain for green in shan - bei district, the thesis bring out some propesal to improve the circ umstance, enhance the life level and put the relation of population, resource and circumstance into a healthy orbit

因此，加快退耕還林還草，調整土地利用結構和產業結構，已成為實現山川秀美工程和可持續發展戰略的必經之路。論文以解決陜北地區的收入問題，植被問題以及糧食產量問題為出發點，首先從理論上分析了包絡分析方法在陜北地區退耕還林（草）中運用的可行性，然後結合陜北地區目前的實際情況，綜合分析出影響陜北地區退耕還林（草）的關鍵的七個因素作為輸入指標：水利水保設施投入，農作物投入，經濟林種支出，防護林支出，其它經濟作物，草類支出，畜牧業投入；以退耕還林所要解決的最終問題作為輸出指標： gdp收入、農民人均純收入、水土流失減少量、牧業總產值、糧食產量、林業總產值、其他經濟作物總產值。將各指標所對應的數據代入模型后，通過分析求解得出非有效的決策單元，再運用包絡分析方法的一些基本原理對非有效的決策單元進行調整，由此所得的數據對陜北地區的實際投入具有很好的指導意義。

Ba sed on the regional ecological condition and the resources characteristics, the measures to improve the hilly eco - environment should be multiply arranged by following the strategical rules and the technique requirements which are plantin g grass and trees sparsely, growing the crops and fruit trees in the terrace, ro tationally cutting the grass, using the forest by rationally graziery, and makin g the soil and water conservation industrialization

山區生態環境建設應從區域生態資源實際出發，按照林草建設疏林化，糧果生產梯田化，刈割草場輪作化，森林利用畜牧化，水土保持產業化的戰略原則和技術要求，鑲嵌配置。