北京快乐8开奖

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CO2气体检测的原理

日期:2020-01-04 09:35
浏览次数:823
摘要: 二氧化碳是绿色植物进行光合作用的原料之一,作物干重的95%来自光合作用。因此,使用二氧化碳传感器控制浓度也就成为影响作物产量的重要因素。 塑料大棚栽培使作物长期处于相对密闭的场所中,棚内二氧化碳浓度一天内变化很大,日出前达到zui大值1000~1200pp,日出后2.5~3小时降为100ppm左右,仅为大气浓度的30%左右,而且一直维持到午后2小时才开始回升,到下午4时左右恢复到大气水平。蔬菜需二氧化碳浓度一般1000~1500ppm。因此,塑料大棚内二氧化碳亏缺相当严重,成为影响塑料大棚蔬菜产量的重要因素。在塑料大棚...

ERYANGHUATANSHILVSEZHIWUJINXINGGUANGHEZUOYONGDEYUANLIAOZHIYI,ZUOWUGANZHONGDE95%LAIZIGUANGHEZUOYONG。YINCI,SHIYONGERYANGHUATANCHUANGANQIKONGZHINONGDUYEJIUCHENGWEIYINGXIANGZUOWUCHANLIANGDEZHONGYAOYINSU。

 

北京快乐8开奖 SULIAODAPENGZAIPEISHIZUOWUZHANGQICHUYUXIANGDUIMIBIDECHANGSUOZHONG,PENGNEIERYANGHUATANNONGDUYITIANNEIBIANHUAHENDA,RICHUQIANDADAOzuiDAZHI1000~1200pp,RICHUHOU2.5~3XIAOSHIJIANGWEI100ppmZUOYOU,JINWEIDAQINONGDUDE30%ZUOYOU,ERQIEYIZHIWEICHIDAOWUHOU2XIAOSHICAIKAISHIHUISHENG,DAOXIAWU4SHIZUOYOUHUIFUDAODAQISHUIPING。SHUCAIXUERYANGHUATANNONGDUYIBAN1000~1500ppm。YINCI,SULIAODAPENGNEIERYANGHUATANKUIQUEXIANGDANGYANZHONG,CHENGWEIYINGXIANGSULIAODAPENGSHUCAICHANLIANGDEZHONGYAOYINSU。ZAISULIAODAPENGZHONGANZHUANGERYANGHUATANCHUANGANQIKEYIBAOZHENGZAIERYANGHUATANNONGDUBUZUDEQINGKUANGXIAJISHIBAOJING,CONGERSHIYONGQIFEI。BAOZHENGSHUCAI、SHIYONGJUN、XIANHUA、ZHONGYAODENGTIZAOSHANGSHI、GAOZHIGAOCHAN。 

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北京快乐8开奖 RECHUANDAOERYANGHUATANCHUANGANQI:JUHUNHEQITIDEZONGDAOREXISHUSUIDAIFENXIQITIHANLIANGDEBUTONGERGAIBIANDEYUANLIZHICHENG,YOUJIANCEYUANJIANHEBUCHANGYUANJIANPEIDUIZUCHENGDIANQIAODELIANGGEBEI,YUKERANXINGQITISHIJIANCEYUANJIANDIANZUBIANXIAO,YUFEIKERANXINGQITISHIJIANCEYUANJIANDIANZUBIANDA(KONGQIBEIJING),QIAOLUSHUCHUDIANYABIANLIANG,GAIDIANYABIANLIANGSUIQITINONGDUZENGDAERCHENGZHENGBILIZENGDA,BUCHANGYUANJIANQICANBIJIWENDUBUCHANGZUOYONG,ZHUYAOYINGYONGCHANGSUOZAIMINYONG、GONGYEXIANCHANGDETIANRANQI、YEHUAQI、MEIQI、WANLEIDENGKERANXINGQITIJIQIYOU、CHUN、TONG、BENDENGYOUJIRONGJIZHENGQIDENONGDUJIANCE。