大棚、温室内补充二氧化碳的方法很多，如燃烧液化石油汽、盐酸石灰石法、硝酸石灰石法等，目前最常用的方法是碳铵与硫酸反应制取二氧化碳。 　　一、操作过程 　　1工业硫酸含量 93％～ 98％，浓度过大不宜直接使用，使用前，浓硫酸与水按体积比 1： 3配制稀释。先将 3份水 Greenhouses, there are many ways to add carbon dioxide in the greenhouse, such as burning liquefied petroleum gas, hydrochloric acid limestone method, nitric acid limestone method, the most commonly used method is to produce carbon dioxide and ammonium bicarbonate reaction. First, the operation process 1  industrial sulfuric acid content of 93% to 98%, the concentration is too large should not be used directly, before use, concentrated sulfuric acid and water volume ratio of 1: 3 preparation diluted. First 3 parts of water