Plant Fact of the Day: Built-in Fertilizer
10Have you ever wondered why soy beans are so high in protein? It’s because soy bean plants have an infinite supply of fertilizer to work with, which lets it pack the beans full of extra nutrients. It gets help from these guys:
Those blobs on the roots are huge bacterial colonies. They pull nitrogen out of thin air and turn it into something the plant can use as fertilizer. In return, the plant gives the bacteria sugar that it pulls out of thin air (from photosynthesis). Really neat relationship.
Apparently, some other plants do this too. There are some varieties of corn that do this, like Sierra Mixe
That slimy stuff on the corn stalk is sugary mucus, which feeds the bacteria and makes it stick there. This type of corn doesn’t taste or produce very good, though, so scientists are trying to figure out how to make regular corn do this so that farmers will never have to fertilize corn again.
- 4 comments, 7 replies
- Comment
Nightmare fuel. If corn looked like that, I don’t know if I’d want it.
@RiotDemon If most definitely not eat it looking like that.
@Enigma @RiotDemon Don’t visit the cornfield at night.
Fava beans are nitrogen fixers too. I put in fava beans in as a winter crop. I chop the tops off in the spring to leaving the roots and the nitrogen in the ground for my spring garden. Favas have tons of nutrients and protein like soy beans.
@bluebeatpete How are they with liver?
@mehcuda67 fthfthfth or however you write that sound.
@Weboh, so I have this vetch plant that takes over my yard if I don’t mow it (last year we had a rainy spell and I just let it go wild) and I tell myself it’s kind of okay because it’s hard at work fixing nitrogen. Is that true, or am I fooling myself?
This stuff.
@Kyeh Yep. Looks like vetch is the same way with nitrogen-fixing bacteria. It’s one of the few weeds that put nutrients in the soil instead of taking them out!
@Weboh Cool! It’s also loved by the bees. It would take over my entire yard if I let it, but once it stops blooming it’s not that great - sprawly and super-invasive.
Mesquite trees do this also using a similar symbiotic relationship with bacteria. Fun fact: Mesquite are actually legumes!