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第483章 套种之法(有图)(1 / 2)

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而且村里也都是明白人,知道他们开荒第一年,是要种大豆的,能养地肥地,送来的大部分都是精挑细选出来的好大豆,还有少量的高粱和苞米。

看着这些感人的种子,沈知秋又找来各家各户的当家人,告诉了他们苞米和大豆套装的方法。

“我曾经在一本农书上看过,咱们这种单一的种植办法是存在弊端的,

就比如说,单一种植苞米,容易造成土壤养分单一消耗,导致土地肥力下降,甚至容易出现板结现象,

至于什么叫板结现象,

就是你们看咱田里,是不是老出现一块一块的那种干裂的裂纹,但有时候这种裂纹,并不是因为干旱造成的,挖起一块有裂纹的土,底下还是潮湿的,这情况你们见过没?”

这个大伙都听呆愣了,这情况太常见了啊,往年他们就感觉那是干旱,没想到还有别的问题。

“有,我家地里就有结块的现象。”

“我家也有,大侄子这严重不严重啊,咋解决?”

看着下面大家一脸急躁,像是天要塌了的表情,

还有一些人用手捂着胸口,一脸希冀的问道:“哎呀,别吵啦,听大侄子说!”

这些人认为,沈知秋不是无的放矢之人,自然知道这情况,还说出来,就是有解决的办法。

沈知秋连忙安抚:“行,我有办法解决,你们先别着急,听我给你们说。

先说土壤板结会给我们重视的粮食造成什么样的影响,

出现板结情况的土地会使作物不能正常呼吸,我们人活着要呼吸,而植物生长也需要呼吸,不过他们要吸收土壤中的养分和水分,这个板结情况,就是影响这个的,

由于土壤板结后,毛细根难以正常吸收水分和养分,所以农作物的根系不能正常发育,土壤的蓄水能力变差,因而抗旱能力也随之降低。

另外,土壤板结还会使农作物的根系生长受阻,从而影响到整个植株的长势。”

“而且,造成土壤板结情况也有很多原因,比如说土壤中水分过多,或者过少,都会导致这种土壤板结,

所以我们在浇水的时候,要注意掌握“一干一湿”和“干透浇透”的原则。

往后有了自来水,我们灌溉浇地也方便了很多,比如我们在晴天浇水时要用小水,一次性浇透,而后在阴天或雨天再浇水一次,

平时也要注意及时松土、透气。

适当松土可以使土壤中的空气得到充分活动,让空气中的氧气进入到土壤中来。

同时,松土还可以把土壤中的有害物质排出去,改善土壤结构。

我知道大家可能听不太懂,但你们记得多松土就行,

再有就是苞米和大豆的套种了,大家都知道种植大豆可以肥地养地,具体是什么原因恐怕大家不清楚,但这是老祖宗祖祖辈辈传下来的经验。

今天有功夫我也就给大家详细的讲讲,以前大家注意过大豆和小麦水稻等作物的根系有什么不同吗?”

给大家问的一头雾水,大多数人表示:“以前种地也没观察过这个啊?庄稼长的好不好,看茎秆不就完了?”

可也有些老把式能说出大豆和小麦水稻根系的区别。

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