<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区

          We have launched E-mail Alert service,subscribers can receive the latest catalogues free of charge

           
           
          You Are Here: Home > Research > Rural Economy> Working Papers

          Rural Economy

          Forage crops production and the balance of China’s food grain supply and demand

          2014-08-28

          By Pan Yaoguo 

          Date: 2004/07/26

          Abstract:?  

          Demand on forage is quickly increasing in China, along with the development of animal husbandry industry. Currently there is a gap in the supply of forage grain to meet the demand; pressure on the demand will pile up in the near future. The solution is to transfer from a two-sector crop structure (food grain and cash crop) to a three-sector structure (food grain, cash crop and forage). Also needed is to increase the rate of return on forage in animal raising through new technology. The forage grain is becoming a major category in China's agriculture. Today the consumption of forage grain is getting to the par of food grain, with a possibility in the near future to dominate China's grain consumption.?

           
          主站蜘蛛池模板: 国产亚洲日韩一区二区三区| 国产成人免费高清激情视频| 高清自拍亚洲精品二区| 国产精品久久久久无码网站| 非会员区试看120秒6次| 亚洲色最新高清AV网站| 亚洲爽爆av一区二区| 色猫咪av在线网址| 91精品啪在线观看国产91九色| 91国产自拍一区二区三区| 欧美大bbbb流白水| 亚洲精品国产av成拍色拍个| 亚洲熟女乱色一区二区三区| 最新系列国产专区|亚洲国产| 四虎影视一区二区精品| 黄色福利在线| 亚洲男人AV天堂午夜在| 99久久精品费精品国产一区二| 国产一区二区三区四区激情| 久久波多野结衣av| 亚洲精品三区四区成人少| 成人无码h真人在线网站| 产综合无码一区| 欧美大屁股喷潮水xxxx| 国产精品老年自拍视频| 久久国产精品成人影院| 一色桃子中出欲求不满人妻| 麻豆国产传媒精品视频| 午夜精品射精入后重之免费观看| 强奷漂亮人妻系列老师| 亚洲人交乣女bbw| 麻豆一区二区中文字幕| 女同久久精品国产99国产精品| 亚洲精中文字幕二区三区| 国产一区在线观看不卡| 亚洲综合在线一区二区三区 | 国产亚洲精品自在线| 国产中文三级全黄| 亚洲人成网站免费播放| 国色天香成人一区二区| 成人aaa片一区国产精品|