[转帖]应根据气候对CO2浓度进行微调
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<p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: center; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="center"><b><span style="font-size: 12pt; color: black;" lang="EN-US">Adjusting CO2 limits<o:p></o:p></span></b></p>
<p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: left; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="left"><span style="font-size: 12pt; color: black;" lang="EN-US">By Cpoint, MB06, 2004<o:p></o:p></span></p>
<p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: left; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="left"><span style="font-size: 12pt; color: black;" lang="NL">Mark den Ouden C point <a href="mailto:markdenouden@cpointnl"><span style="color: rgb(4, 56, 130); text-decoration: none;">markdenouden@cpointnl</span></a></span><span style="font-size: 12pt; color: black;" lang="SV"><o:p></o:p></span></p>
<p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: left; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="left"><span style="font-size: 12pt; color: black;" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: left; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="left"><span style="font-size: 12pt; color: black;" lang="EN-GB">Closing the air
inlet to the maximum CO<sub>2</sub>-limit can result in a situation with an
oxygen shortage</span><span style="font-size: 12pt; color: black;" lang="EN-GB">.</span><span style="font-size: 12pt; color: black;" lang="EN-GB"> The fact that this maximum CO<sub>2</sub>-limit
differs in the winter and in the summer indicates that more than one factor is
influential here: It is generally well known that a too high CO<sub>2</sub>
concentration can cause a lack of oxygen</span><span style="font-size: 12pt; color: black;" lang="EN-GB">.</span><span style="font-size: 12pt; color: black;" lang="EN-GB"> However that
excessively high moisture contents (except with evaporation problems) can also
lead to a lack of oxygen is not such a commonly known fact</span><span style="font-size: 12pt; color: black;" lang="EN-GB">.</span><span style="font-size: 12pt; color: black;" lang="EN-GB"> Maintaining a
fixed maximum CO<sub>2</sub>-limit in situations with a high moisture content
in the growing room air creates a risk of too low oxygen concentrations which
has a negative effect on the decomposition process in the compost</span><span style="font-size: 12pt; color: black;" lang="EN-GB">.</span><span style="font-size: 12pt; color: black;" lang="EN-GB"> Current
climate controls do not (yet) automatically correct this</span><span style="font-size: 12pt; color: black;" lang="EN-GB">.</span><span style="font-size: 12pt; color: black;" lang="EN-GB"> But growers
can adjust the maximum CO<sub>2</sub> limit themselves to suit the moisture
content in the growing room</span><span style="font-size: 12pt; color: black;" lang="EN-GB">. A</span><span style="font-size: 12pt; color: black;" lang="EN-GB">ir </span><span style="font-size: 12pt; color: black;" lang="EN-GB">c</span><span style="font-size: 12pt; color: black;" lang="EN-GB">alculations
show that the maximum CO<sub>2</sub>-limit must be lowered by on average 326
ppm per gram of too high moisture content</span><span style="font-size: 12pt;" lang="EN-GB"> and the reverse</span><span style="font-size: 12pt;" lang="EN-GB">.</span><span style="font-size: 12pt;" lang="EN-GB"> So a maximum CO<sub>2</sub> limit of eg 2000 ppm
with a moisture content of eg <st1:chmetcnv unitname="g" sourcevalue="105" hasspace="True" negative="False" numbertype="1" tcsc="0" w:st="on"><span style="color: black;">105 g</span></st1:chmetcnv><span style="color: black;">/kg
will give the same oxygen concentration as a maximum CO<sub>2</sub> limit of
1674 ppm with a moisture content of <st1:chmetcnv unitname="g" sourcevalue="115" hasspace="True" negative="False" numbertype="1" tcsc="0" w:st="on">115 g</st1:chmetcnv>/kg
etc</span></span><span style="font-size: 12pt; color: black;" lang="EN-GB"> </span><span style="font-size: 12pt; color: black;" lang="NL"><o:p></o:p></span></p>
<p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: left; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="left"><span style="font-size: 12pt; color: black;" lang="NL"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: left; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="left"><span style="font-size: 12pt; font-family: 宋体; color: black;">新鲜空气阀门的关闭导致</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度升至最高设定值的过程中会产生蘑菇缺氧。</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度最高设定值的设定在冬季和夏季并不能完全相同，这一事实说明还有其他因素影响其变化。过高的</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度导致氧气的缺乏这一观点已经被广泛接受。然而过高的空气湿度</span><span style="font-size: 12pt; font-family: 宋体;">（排除对双孢蘑菇蒸腾的影响）<span style="color: black;">同样能够导致缺氧这一事实并没有被大家所熟知。若栽培房维持</span></span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度最高值的同时还保持高湿环境就会引发缺氧的危险，这种环境会阻碍培养料的分解转化。我们目前所采用的环境控制系统还不能根据空气湿度自动修正</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">值的设定。因此栽培管理者要调节</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度最高设定值以匹配栽培房的湿度。通过计算得知：在高湿条件下，</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度最高设定值以</span><span style="font-size: 12pt; color: black;" lang="EN-GB">326ppm/g</span><span style="font-size: 12pt; font-family: 宋体; color: black;">的速率降低或升高。所以，湿度</span><st1:chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="True" sourcevalue="10.5" unitname="g" w:st="on"><span style="font-size: 12pt; color: black;" lang="EN-GB">10</span><span style="font-size: 12pt; color: black;" lang="EN-GB">.</span><span style="font-size: 12pt; color: black;" lang="EN-GB">5 g</span></st1:chmetcnv><span style="font-size: 12pt; color: black;" lang="EN-GB">/kg</span><span style="font-size: 12pt; font-family: 宋体; color: black;">（相对湿度</span><span style="font-size: 12pt; color: black;" lang="EN-GB">82%</span><span style="font-size: 12pt; font-family: 宋体; color: black;">）空气时，</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度高限应设定为</span><span style="font-size: 12pt; color: black;" lang="EN-GB">2000 ppm</span><span style="font-size: 12pt; font-family: 宋体; color: black;">，湿度为</span><st1:chmetcnv tcsc="0" numbertype="1" negative="False" hasspace="True" sourcevalue="11.5" unitname="g" w:st="on"><span style="font-size: 12pt; color: black;" lang="EN-GB">11</span><span style="font-size: 12pt; color: black;" lang="EN-GB">.</span><span style="font-size: 12pt; color: black;" lang="EN-GB">5 g</span></st1:chmetcnv><span style="font-size: 12pt; color: black;" lang="EN-GB">/kg</span><span style="font-size: 12pt; font-family: 宋体; color: black;">（相对湿度</span><span style="font-size: 12pt; color: black;" lang="EN-GB">90%</span><span style="font-size: 12pt; font-family: 宋体; color: black;">）空气时，</span><span style="font-size: 12pt; color: black;" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black;">浓度高限应设定为</span><span style="font-size: 12pt; color: black;" lang="EN-GB">1674 ppm</span><span style="font-size: 12pt; font-family: 宋体; color: black;">，这两种条件下，空气中氧气的含量是相同的。</span></p><p class="MsoNormal" style="background: white="white"none="none"repeat="repeat"scroll="scroll"0% 0%; text-align: left; -moz-background-clip: border; -moz-background-origin: padding; -moz-background-inline-policy: continuous;" align="left">以上是翻译mushroom business杂志上的文章，如有翻译错误之处请各位专家指正！<br/><span style="font-size: 12pt; font-family: 宋体; color: black;"></span><span style="font-size: 12pt; color: black;" lang="NL"><o:p></o:p></span></p> <p>这篇文章主要提醒大家对栽培房空气的重视，做到防微杜渐的作用</p> <div class="msgheader">QUOTE:</div><div class="msgborder"><b>以下是引用<i>jph6060</i>在2010-1-15 13:56:49的发言：</b><br/><br/>请教楼主老师:<br/>菇房里缺氧, 是整体的空气缺氧, 还是氧气上浮, 二氧化碳下沉.<img style="CURSOR: pointer" onclick="javascript:window.open(this.src);" alt="图片点击可在新窗口打开查看" src="http://www.mbbs.com.cn/Skins/default/topicface/face10.gif" onload="imgresize(this);"/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/><br/></div>
<p>二氧化碳、氧气都是空气下层的浓度稍高。替楼主回答了，不好意思，反客为主了。呵呵。</p> 不过，这段文章，我认为对食用菌生产并无指导意义。也许是楼主选择的段落不好，只是选择了文章的一小段，如果是全文，这篇文章就一点意义也没有了，文章的着眼点就不对。 <p>好东西，学习学习，多谢楼主！</p> <p>这个知识第一次学到，真是非常好的理论，希望楼主能多发这样的好帖，外国人研究的果然厉害。</p> <span style="font-size: 12pt; font-family: 宋体; color: black; background-color: rgb(255, 0, 0);">过高的</span><span style="font-size: 12pt; color: black; background-color: rgb(255, 0, 0);" lang="EN-GB">CO<sub>2</sub></span><span style="font-size: 12pt; font-family: 宋体; color: black; background-color: rgb(255, 0, 0);">浓度导致氧气的缺乏这一观点已经被广泛接受。然而过高的空气湿度</span><span style="font-size: 12pt; font-family: 宋体;"><span style="background-color: rgb(255, 0, 0);">（排除对双孢蘑菇蒸腾的影响）</span><span style="color: black;"><span style="background-color: rgb(255, 0, 0);">同样能够导致缺氧这一事实并没有被大家所熟知</span><br/><br/>是不是可以理解成我们到澡堂去洗澡，当水汽特别大时我们会觉得呼吸困难，感觉到缺氧<br/></span></span><p></p> <div class="msgheader">QUOTE:</div><div class="msgborder"><b>以下是引用<i>beibeiyu</i>在2010-1-15 10:28:35的发言：</b><br/><span style="BACKGROUND-COLOR: rgb(255,0,0); FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt">过高的</span><span style="BACKGROUND-COLOR: rgb(255,0,0); COLOR: black; FONT-SIZE: 12pt" lang="EN-GB">CO<sub>2</sub></span><span style="BACKGROUND-COLOR: rgb(255,0,0); FONT-FAMILY: 宋体; COLOR: black; FONT-SIZE: 12pt">浓度导致氧气的缺乏这一观点已经被广泛接受。然而过高的空气湿度</span><span style="FONT-FAMILY: 宋体; FONT-SIZE: 12pt"><span style="BACKGROUND-COLOR: rgb(255,0,0)">（排除对双孢蘑菇蒸腾的影响）</span><span style="COLOR: black"><span style="BACKGROUND-COLOR: rgb(255,0,0)">同样能够导致缺氧这一事实并没有被大家所熟知</span><br/><br/>是不是可以理解成我们到澡堂去洗澡，当水汽特别大时我们会觉得呼吸困难，感觉到缺氧<br/></span></span>
<p></p></div>
<p> 说的形象，beibeiyv对生活感受很深<br/><br/></p> 我们易菇论坛真的火了，连海龟都来发帖子了！狂顶！ 看人家的叙述，准确严密。<br/>顶何姓楼主