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CO2氣體檢測的原理

日期:2019-12-26 17:30
瀏覽次數:799
摘要: 二氧化碳是綠色植物進行光合作用的原料之一,作物干重的95%來自光合作用。因此,使用二氧化碳傳感器控制濃度也就成為影響作物產量的重要因素。 塑料大棚栽培使作物長期處于相對密閉的場所中,棚內二氧化碳濃度一天內變化很大,日出前達到zui大值1000~1200pp,日出后2.5~3小時降為100ppm左右,僅為大氣濃度的30%左右,而且一直維持到午后2小時才開始回升,到下午4時左右恢復到大氣水平。蔬菜需二氧化碳濃度一般1000~1500ppm。因此,塑料大棚內二氧化碳虧缺相當嚴重,成為影響塑料大棚蔬菜產量的重要因素。在塑料大棚...

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欢乐生肖  

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欢乐生肖  

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