第四百九十二章 红薯的妙用
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李世民希望李休能够想出一个阻止蝗灾的办法，可惜李休对蝗灾的了解不多，根本无能为力，不过也就在这时，却没想到杨农竟然站了起来，告诉李世民他有一个可以减少蝗灾损失的办法，这让所有人都是吃了一惊。龙腾小说网ltxsba.com
“杨公快快请讲！”李世民在反应过来后，立刻急切的向杨农开口询问道。
“陛下，蝗灾之所以可怕，主要是在蝗灾发生之时，蝗虫遮天蔽日而来，将田间的作物啃食一空，导致当季的作物几乎是颗粒无收，从而导致饿殍遍地，但如果蝗灾爆发时，对作物的伤害很小的话，那么蝗灾也就不足为惧了！”杨农这时笑呵呵的开口道。
“这怎么可能，蝗灾来临时，那些蝗虫就像是疯了一般，连树叶都会被它们吞噬一空，更不可能放过肥美多汁的庄稼了！”就在杨农的话音刚落，就见杜如晦忽然皱着眉头开口道，不是他不相信杨农，而是杨农的想法实在有些异想天开。
“呵呵，杜相不必急着反驳，如果放在以前，每当蝗灾爆发之时，田地里的庄稼的确会被吞噬一空，但是现在不一样了，因为蝗虫再怎么厉害，也只能只地面以上的庄稼，地底下的庄稼却可以保存下来……”
“红薯！”没等杨农把话说完，旁边的李休就惊喜的高声叫道，他终于明白了杨农的意思，红薯这东西长在地下，而且就算是蝗虫把地表的藤蔓吃光了，下面的根还是可以再长出来，当然这会影响到产量，但总比颗粒无收要强得多！
“哈哈哈，驸马说的不错，老朽说的正是我们农部正在推广的红薯，此物长于地下，不怕蝗虫的啃食，而且就算是地表的藤蔓毁了，也可以重新长出来，所以如果明年开春之后，朝廷在关中大力推广红薯的话，哪怕是蝗灾来了，也不用担心粮食之危！”杨农这时一脸激动的开口道，他也是刚刚才想到这一点。
“太好了！”李世民听到这里也不由得拍案而起，他刚才还在为蝗灾的事而头疼，却没想到解决蝗灾的办法早就有了，只是他们之前都没有想到，不过这也不能怪他们，毕竟连李休这个献上红薯的人也同样没有想到。
“杨公，让关中种植红薯的确是个好办法，可是我记得红薯的种植面积好像也只在新筑和青田两县境内，想要推广到全关中的话，这个秧苗恐怕也是个大问题吧？”不过也就在这时，李休却忽然皱着眉头开口道。
不是李休泼凉水，而是红薯与其它的作物不同，虽然也可以用红薯来繁殖，但却太浪费了，一般都是用生长出的藤蔓来扦插，而藤蔓却需要提前来繁殖，保存也是个问题，另外红薯种植的时间也太短，现在也只有青田和新筑两县有种植，所以就算把两县的红薯都用来育苗，恐怕也不够整个关中种植的。
“驸马不必担心，红薯的繁殖迅速，远比玉米要快得多，所以现在青田与新筑两县中，红薯的数量远比玉米要多，今年虽然旱了一些，但红薯十分耐旱，产量并没有受影响，等到红薯收获之后，可以集中储藏起来，等到明年再分发各地育苗，当然就算是这样，想要让关中全都种上红薯还是有些不够，不过没关系，我们农部还有另外一种育苗的办法！”杨农说到最后时，脸上也露出一种得意的表情。
“另外一种育苗？红薯不都是让红薯根茎发芽后长出藤蔓，然后用这些藤蔓插扦吗？”李世民听到杨农的话也不由得有些惊讶的道，他对红薯和玉米也十分的重视，对于红薯的种植过程更是了解的十分清楚。
“红薯原来的育苗方法的确像陛下所说的那样，是用红薯的块根，也就是红薯能吃的果实来育苗的，不过去年我们农部发现，其中秋天被我们丢弃的红薯藤蔓和藤根，如果保存得当，同样也可以用来育苗，如此一来，利用那些本来要丢弃的藤蔓和藤根，也可以培育出大量的红薯秧苗来，以今年红薯的种植量来计算，明年不敢让所有关中人都种上红薯，但可以让每个县都种上一部分红薯，以应对明年的蝗灾！”杨农再次兴奋的禀报道。
听到杨农的回答，李休也是暗叫一声惭愧，亏他还是农部的二把手，但却对农部的很多事都不清楚，比如这个红薯用藤蔓和藤根来育苗的办法，他就一点也不知道，毕竟他一般都是十天半月才去农部一趟，而且去了也只是随便转转，很少关心农部内部的具体事宜，杨农对他这种懒散的态度也都习惯了，平时除非有特别重要又无法解决的事才会找他。
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