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“几乎所有的蔬菜都适合在壤土上种植,壤土也适合玉米、小麦、大豆等主要的粮食作物的种植,就连棉花、油菜等等经济作物在壤土里也有比较好的生长状况。”

贾思勰其实也知道土壤和选择种哪些农作物息息相关,并没有惊异,只是完善一下子自己的知识,想要看看天幕上还能够说多少种土质。

然后朱清谷就放出了偏红的土。

朱元璋摇摇头,“这土就不适合种菜。”

“就连土质也有讲究……”隋文帝杨坚双手背负,看着天幕,“种地是一门深奥的学问。”

独孤皇后说,“后世的粮食能够如此高产也是不那么简单的一件事情。”

“还是先研制农具以及肥料,逐步推进。”隋文帝揉了揉额头,又是想到自己家的两个反目成仇的儿子,总是感觉疲累,或者说是心累。

看到他有些精神不济,独孤皇后转头就说起了李世民最近的近况。

隋文帝的眉目才舒展开。

杨勇和杨广都不是帝王之才,倒是天幕上反复提起的李世民让他有了爱才之心。

独孤皇后也已经放弃了这两个儿子,也有些猜中杨坚心中所想。

既然已经有现成的,不若就让大隋同大唐一样,成为后世汉人心中典范!

……

“这是红壤,比较黏重,保水性比较强,但是通气性比较差,一般红壤比较多的地方通常是高温多雨,使得土壤当中的钙、镁、钾等等被雨水带走,使得土壤当中氢离子较多,土壤呈现酸性。”

“红壤当中肥力不高,比较适合茶树、油茶、柑橘或者是甘蔗等等作物生长。”

天幕当中闪过几张图片,高耸的甘蔗、硕果累累的柑橘树都让天幕下的人一阵注意。

当然他们也明白朱清谷说的,不是非要什么土能种什么农作物就非种这种农作物。

只是让大家因地制宜。

“黑土,大家也是最熟悉的,黑土的肥力比较高,保水性好,营养丰富,所以大豆、玉米、小麦、水稻等等在黑土上产量都比较高。”

“然后就是棕壤,棕壤其实和前面的壤土有些相似,有些地方的棕壤土质会轻一些,偏向于砂质,肥力还是很不错的的,很适合种植苹果、梨等等果树,而一些粮食作物也很适合在棕壤上种植。”

她的手一划,一瞬间所有的土壤的图片包括农作物的图片都已经被全部收起来了。

被取而代之的是一些长在水里的菜的图片?

“之前我们也说到过一些农作物的种植方法,比如说轮作、间作、套作等等。”

“无论怎么样这些都是需要土壤,而在现代社会,无土栽培就已经提出了设想。”

“比如说水培、岩棉培、沙培等等。”

“这个视频里的农作物就是水培。”

天幕下的人便是看到了水上的泡沫板里一棵一棵十分翠绿的蔬菜,生长得十分健康繁茂。

而他们也确确实实没有见到土壤。

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