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第104章 蔬菜大棚

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“那为何咱们烧的不如红毛子的呢?”曹佾有点失望,本以为又是一门好生意呢。

“两个问题解决不了,一是铁,二是去除气泡。”

“铁?”

“对,沙子里含有少量的铁,这就是为什么咱们烧出来的发绿,而不透亮的原因。”

曹佾听不懂,但仍问道:“就没什么办法?”

“有!”唐奕答道,“最简单的方法就是把沙子换成高品质的石英,粉料之后,再过一遍磁石筛子。”

“那怎么不换?”

“因为没必要,气泡的问题解决不了,什么都是白费。”

“....”

这还真是个问题.....就算再晶莹剔透的琉璃,一但有泡,就卖不上价钱了。

“不过,这样也够用了。”

“这有啥用?”

曹佾撇着嘴,做灯罩都没人用,谁会花几百贯装了沼气灯,却用这么次的灯罩?

唐奕嘿嘿一笑,“你等着看就知道了...”

奶奶的!曹佾又想暴走!这混蛋又是话说一半....

...

之后半月,回山花田尽数收割。

若按往年流程,农户就要着手平整田地,为种冬麦做准备,可是今年却不同。

可能是唐奕搞建设搞上瘾了....

望河坡和城中店铺两片大工地还不够,唐奕又雇了一大批泥瓦匠,在回山的三百亩旱田又盖起了房子。

这回不光曹佾,连王里正都是极力反对。虽然今年种花田回山收入不扉,但这三百亩好田是回山人吃饭的根本,盖上房子干啥?

但是,唐奕一解释...王里正就惊了!

唐奕要种大棚蔬菜!!

...

《汉书、召信臣传》载:‘太官园种冬生葱、韭、菜茹,覆以屋庑,昼夜燃蕴火,待温气乃生……’

古代很早就有温室蔬菜,但却一直无法普及,更形不成产业。

为什么呢?因为耗费太大!温室蔬菜在古代那属于“高精尖”项目,投资很大。

从‘覆以屋庑,昼夜燃蕴火’就不难看出,蔬菜得种在屋子里,日夜烧火保温。

汉书中记载的温室仅供皇家用度,每年就要耗费几千万钱,而当时天灾人祸不断发生,百姓衣食尚不得温饱,皇帝也吃不起这比金子还贵的鲜菜!

至于大宋。

也有反季蔬菜,而且技术比汉唐更先进。宋朝已经可以用火炕来无土栽培豆芽,可以利用光洼(有阳光的坑洞)来形成温室效应。但依然产出有限,且花费极大。

“大郎要把三百亩地都种上鲜菜!?”曹佾有点上头。有钱不是你这么花的啊!三百亩地的温室蔬菜,那耗费得多大?谁也不敢这么玩啊!

唐奕笃定道:“放心,咱这温室耗费极小,入冬几乎不用以火薪升温。”

不用生火?那还不都冻死了?

古代制约大棚蔬菜发展的,主要就是透光材料的的问题。古人以纸蒙窗,那透光性得有多差?光源不足,导致形不成温室效应,只能用生火来提高室温。

而唐奕现在有了玻璃,虽说都是气泡,但是简单压制,做成平板的采光玻璃却是没问题的.....

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