由买买提看人间百态

boards

本页内容为未名空间相应帖子的节选和存档,一周内的贴子最多显示50字,超过一周显示500字 访问原贴
gardening版 - 学习笔记- what seeds can be saved?
相关主题
西瓜雌雄同花Lychee Pollination
早上给花人工授粉这个是桃花还是樱花?
院子里终于来了黑蜜蜂bing cherry vs. lapins
梨花开了Artichoke 结了一个小果
桃树是否可以从种子种起 ?再说说他们的 pollination project
帮我看看我家的樱桃吧!pollination 还是很有效果的, 结了好多小西红柿
Persimmon tree and cross-pollination同学们有人种山楂树的吗? chinese hawthorn tree
嫁接树,或者几棵树在一个坑里?请问下哈,哪些果树是雌雄异体的?需要种两棵么?
相关话题的讨论汇总
话题: pollinating话题: flower话题: pollinated话题: pollination话题: bagging
1 (共1页)
a**u
发帖数: 1485
1
seeds saving
What Seeds Can Be Saved? And how?
http://gardening.about.com/od/gardenmaintenance/a/SeedSaving.ht
http://forums.gardenweb.com/forums/load/seedsave/msg01153128858
So, is a good rule of them that self-pollinating species are generally safe,
whereas insect/wind-pollinated species require extra attention?
Generally, that's true. But growing only self-pollinating vegetables really
limits you in what vegetables you can grow. It limits you to only using
heirloom (open-pollinated), self-pollinating vegetables and well-stabilized
older hybrids.
It won't keep some newer hybrid things from reverting even if they are self-
pollinating. In other words, if you grow a newer hybrid variety of tomato or
squash that hasn't been around for years and is well-stabilized the seeds
from that tomato or squash may revert the following year regardless of any
cross-pollination that may or may not have taken place. Follow me?
From Mother Earth News
"The easiest way for the beginning seed grower to avoid [cross pollination
problems] is to concentrate on self-pollinating vegetables - such as lettuce
, okra, beans, peas, and tomatoes - which have flowers designed in ways that
discourage or prohibit fertilization by other plants. (Peas and tomatoes,
for example, have already pollinated themselves by the time the flowers open
!) Still, to restrict your efforts to these plants is to miss out on much of
the fun, challenge and satisfaction of growing your own seeds."
And bagging a couple of blooms and hand pollinating them is really quite
simple to do and takes only a few minutes. There is a FAQ on how to do here
at GW. Had your Dad done that you wouldn't be scarred for life. ;)
Help or make it more confusing?
Dave
Bagging Plants to Prevent Cross-Pollination of Vegetables
http://www.vegetablegardener.com/item/11771/bagging-plants-to-p
Bagging as Mechanical Isolation
Plants that are insect-pollinated such as broccoli, cucumbers, watermelon,
and pumpkins can be protected from cross-pollination by using the bagging
technique. Although many gardeners consider tomatoes and peppers "self-
pollinating" plants (and for the most part, it's true) they can and will
cross-pollinate, as well.
So, bagging is exactly what it sounds like; the female flower is covered
with a bag so that pollinators such as insects can't get to her and do the
pollination dance. In the case of tomatoes and peppers, the flowers are "
complete", so you'd cover any flower. If you're working with a plant such as
the pumpkins we talked about above, you'd hand-pollinate the female flower
using either a paintbrush the flower-to-flower technique.
After the romance is over, the flower should be covered with a paper or
light material bag like muslin or a commercial product called Reemay. Don't
use plastic bags for bagging flower heads because this can cause the flower
to fry in the sun or get slimy. The flowers would then be completely
unsuitable for seed production.
For veggies that self-pollinate, cover the blossoms with a bag as soon as
they appear. The bag should be secured to the stem without hurting the plant
. Try using a cotton ball under the edge of the bag and then tie it off with
thick thread or a twist-tie. You do want the tie to be secure, but be
gentile.
A cotton ball placed in this position will also serve to keep determined
bugs from reaching the flower. When you see fruits forming, you can take the
bag off with no further worries. Remember to tie an identifying string or
ribbon onto the stem after the flower has set fruit before you remove the
bag! This way there'll be no question about which flower you pollinated.
Using physical barrier techniques such as bagging doesn't take much time to
perfect and you'll have pure pollinated seed to save for your home seed bank
and next year's garden.
http://www.eatforfreeproject.org/page11.htmhttp://www.eatforfre
图一
http://www.liseed.org/art.html
图二
图三
以上内容都来自网上啊。都给了link, 有兴趣的同学自己去读。
总结:
1)哪些种子不可以留?
hybrid不可以留,除了某些heirloom。
2)哪些种子可以留?
self-pollinating species可以留种,heirloom可以留。比如 lettuce, okra, beans,
peas, and tomatoes都是self-pollinating species,虽然也会有一定程度的cross-
pollination,但是可以忽略不计。
3)哪些可以通过controlled pollination来留种子?
Insect/wind-pollinated species 虽然不能直接留种子,但是通过controlled
pollination也是可以的。方法很多,说两种比较常见和操作性比较强的。方法:1,对
于雌雄同花的,such as broccoli直接在小虫子来授粉之前把花cover起来就行了(不
要用塑料袋,要用纸的或布的),收种子的时候只收这部分的种子(图一)。2,对于雌
雄异花的,主要是瓜类,such as cucumbers, watermelon,and pumpkins,雌花和雄花
都要盖起来(图二),然后人工授粉(图三)。记得在瓜柄上留个标签,免得不小心摘
掉吃了啊。
不对之处请大牛指正。欢迎讨论。
a**u
发帖数: 1485
2


【在 a**u 的大作中提到】
: seeds saving
: What Seeds Can Be Saved? And how?
: http://gardening.about.com/od/gardenmaintenance/a/SeedSaving.ht
: http://forums.gardenweb.com/forums/load/seedsave/msg01153128858
: So, is a good rule of them that self-pollinating species are generally safe,
: whereas insect/wind-pollinated species require extra attention?
: Generally, that's true. But growing only self-pollinating vegetables really
: limits you in what vegetables you can grow. It limits you to only using
: heirloom (open-pollinated), self-pollinating vegetables and well-stabilized
: older hybrids.

a**u
发帖数: 1485
3
下次要研究一下organic farming

safe,
really
★ 发自iPhone App: ChineseWeb - 中文网站浏览器

【在 a**u 的大作中提到】
: seeds saving
: What Seeds Can Be Saved? And how?
: http://gardening.about.com/od/gardenmaintenance/a/SeedSaving.ht
: http://forums.gardenweb.com/forums/load/seedsave/msg01153128858
: So, is a good rule of them that self-pollinating species are generally safe,
: whereas insect/wind-pollinated species require extra attention?
: Generally, that's true. But growing only self-pollinating vegetables really
: limits you in what vegetables you can grow. It limits you to only using
: heirloom (open-pollinated), self-pollinating vegetables and well-stabilized
: older hybrids.

1 (共1页)
相关主题
请问下哈,哪些果树是雌雄异体的?需要种两棵么?桃树是否可以从种子种起 ?
问个樱桃树的问题帮我看看我家的樱桃吧!
我的种果树计划Persimmon tree and cross-pollination
新人问个Apple tree pollinator的问题嫁接树,或者几棵树在一个坑里?
西瓜雌雄同花Lychee Pollination
早上给花人工授粉这个是桃花还是樱花?
院子里终于来了黑蜜蜂bing cherry vs. lapins
梨花开了Artichoke 结了一个小果
相关话题的讨论汇总
话题: pollinating话题: flower话题: pollinated话题: pollination话题: bagging