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Miss Chen
16 hours ago
Miss Chen
养殖变色龙花时,可将沙土、园土、蛭石混合制作成栽培的基质。在春季需每周浇水1~2次,在夏季水分蒸发较快,需浇水2~3次。日常可将变色龙花放置到光线明亮处进行养护,促使变色龙花开出更为艳丽的花朵。注意养殖变色龙花时,需每隔1~2年换一次盆,避免土壤出现板结的状况。
变色龙花的养殖方法 1、适宜的土壤 变色龙花适宜生长在疏松透气且排水性较强的土壤中,养殖变色龙花时,可将沙土、园土、蛭石混合制作成栽培的基质,并掺入适量腐熟的有机肥来提升土壤的肥力,使变色龙花能够旺盛的生长发育。 2、浇水方法 变色龙花适宜生长在湿润的环境中,给变色龙花浇水时,需根据季节的变化来调整浇水量。在春季需每周浇水1~2次,可选择浇灌无污染的矿泉水,在夏季水分蒸发较快需每隔2~3天浇一次水,避免变色龙花出现缺水死亡的状况。
3、充足的光照 养殖变色龙花时,还需保证光照的充足,日常可将变色龙花放置到光线明亮处进行养护,每天给予6小时的光照,促使变色龙花进行光合作用,以加快变色龙花开花的速度,但在夏季光照过强时,还需做好者遮阴处理,避免强光灼伤叶片。 养殖变色龙花的注意事项 注意在养殖变色龙花的过程中,需每隔1~2年换一次盆,避免土壤出现板结的状况,并且在换盆时,还需修剪掉变色龙花上腐烂的根系。在变色龙花花谢后,还需及时修剪掉开败的残花,使变色龙花在来年能够开出更多的花朵。
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Miss Chen
16 hours ago
Miss Chen
The Parodia magnifica genus includes a multitude of showy and easy-to-grow small ball cacti. Native to central South America, they are easy to care for, making them excellent beginner cacti. Their round appearance is to credit for their shapely name, and they can grow in clusters up to over a foot wide. While they prefer a warm and dry climate, they are more adaptable than some of their cacti cousins, able to withstand temperatures that hover around freezing as long as they're kept dry. Ball cacti are moderate growers, adding about 4 inches to their height each year. Older plants will frequently produce flowers in beautiful shades of yellow, red, orange, or pink, and all varietals feature ridges of spikes that start out white and grow to a yellow-brown with age.
Botanical Name Parodia magnifica Common Name Ball cactus, balloon cactus, silver ball cactus, blue ball cactus Plant Type Cactus Mature Size 3–12 in. tall, 3–18 in. wide Sun Exposure Full sun, partial shade Soil Type Sandy, well-drained Soil pH Acidic Bloom Time Summer Flower Color Yellow, pink, red, orange Hardiness Zones 9–12 (USDA) Native Area South America Ball Cactus Care If you can grow cacti and succulents successfully, you can likely grow the popular ball cactus without too much trouble. It's important to remember that the ball cactus doesn't like direct sunlight and is accustomed to more water than many other cacti species. Additionally, it's imperative that the cactus is not exposed to prolonged dampness or sitting water. Never let your cactus sit in a dish of water, and take care to ensure its soil is very well-draining. To encourage better flowering, allow the plants to enjoy a cooling period in the winter and dramatically cut back on watering cadence. Lastly, make sure to fertilize during the growing season for the best results. Light Ball cacti like lots of light—just not too much of it. Don't let that confuse you, though—it's actually simpler than it seems. Essentially they can take direct sunlight in the softer hours of the mornings and afternoons but should be kept in partial shade throughout the hottest hours of the day. If your yard or garden can't account for both, consider planting your cactus in a pot that you can move into a shadier spot during high noon. If you're planting your cactus indoors and are sitting it at a window sill for sunlight, be sure to rotate it periodically to ensure even (not skewed or crooked) growth. Soil Like many cacti, the ball cactus prefers an airy, dry soil mixture. Drainage is especially important as well, so if you're opting for a store-bought blend (cacti or succulent-specific mix is your best bet), consider adding coarse sand, perlite, or pumice to the mixture to help aerate the soil. Overall, the pH level of the soil isn't terribly important to the ball cactus, but it does thrive best in a slightly acidic mixture with a pH between 6.1 and 6.5. Water Ball cacti are drought tolerant but do like water during their growing season. Provide regular water during the spring and summer months, but only when the soil is dry to the touch, thoroughly soaking the soil through when you do water. In the winter the cactus will go dormant and need very little water, so you can cease complete cut back watering and let the soil almost dry between waterings, but do not let it completely dry out. If planted in a container, make sure there are several holes in the bottom of the pot to aid in drainage. Temperature and Humidity True to their nature, ball cacti prefer warm, desert-like conditions. That being said, they can survive in below-freezing temperatures as low as 20 degrees Fahrenheit, though it's not recommended that they're kept that cold for very long at all. Dry heat is the key to keeping any cactus, and ball cacti will not do well if exposed to too much moisture—either from watering or in the form of humidity. Therefore, it is unnecessary to spritz them or increase the humidity in their environment. Fertilizer Though not necessary, the ball cactus will respond well to fertilizer. During the growing season, fertilize with a cacti fertilizer mix, and suspend feeding during the dormant winter period.
Propagating Ball Cactus Ball cacti can be propagated easily from offsets, which readily form in clusters around the base of the mother plant. To propagate, carefully remove an offset and allow the cut section to dry on a paper towel for a few days–depending on the size of the cut area, a callous will form over the cut surface. Once the callous has formed, place the new plant in a pot with a cactus or succulent soil mixture and keep it in a warm place until new roots emerge. Once the cactus is established, repot it into a regular-sized container. Potting and Repotting Ball Cactus Repot your ball cactus as needed, preferably during the warm season. Make sure the soil is dry before repotting, then gently remove the cactus and surrounding soil from the pot. Knock away the old soil from the roots, making sure to remove any rotted or dead roots in the process. Treat any cuts with a fungicide. Place the plant in its new pot and backfill with potting soil, spreading the roots out as you repot. Leave the plant dry for a week or so, then begin to water lightly to reduce the risk of root rot.
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Miss Chen
09-18
Miss Chen
很多朋友喜欢养一些花花草草来陶冶情操,但由于平时工作太忙疏于照顾,导致植物生病甚至死亡。那有没有不用怎么照顾就能长得很好的植物呢?当然有,今天小编就给大家推荐8种超好养活的植物,你越懒它长得越好。 超好养活的植物 空气凤梨
推荐理由:不用土 耐旱 耐光 耐寒 无蚊虫滋生 养护要点: 1、放置在散射光的地方,不能暴晒。 2、需要加强通风,要不然很容易被闷坏。 2、室内养的空气凤梨一周向叶面喷1-2次水,不要让叶心不能积水,以免引起“烂心”。 虎皮兰
推荐理由:耐旱 喜光又耐阴 养护要点: 1、喜欢阳光,一般放置于阴处或有散光照的地方。 2、浇水适中不能过湿,大概一周一次,冬天一个月一次。 3、如果想它长得更加旺盛,可每一个月施一次有机肥。 绿萝
推荐理由:耐涝 耐阴 养护要点: 1、可放置有散射光的地方养护。 2、水培绿萝半个月换一次水,有水就能活,可以滴一点营养液。 3、土培绿萝3~4天浇一次即可,不能积水。引起烂根。可以经常给叶面喷水。 落地生根
推荐理由:繁殖快速,好养活 养护要点: 1、平时浇水要见干见湿,秋凉后要减少浇水。 2、喜光,盛夏要稍遮荫,其它季节都应有充足的光照。 芦荟
推荐理由:耐旱 耐阴 养护要点: 1、大概一个月浇水一次,忌积水。 2、养在光照充足且通风良好的地方,夏天高温适当遮阳。 3、宜用肥沃疏松、排水良好的砂质壤土。 仙人球
推荐理由:越不理它,它长得越好 养护要点: 1、宜在排水良好的砂壤土生长。 2、喜光,放置在阳光充足的地方即可。 3、如果养在室外就直接不用管了,养在室内就一个月浇一次水即可。 太阳花
推荐理由:喜光 耐旱 养护要点: 1、喜光,平常多晒太阳,最好放在朝南的阳台。 2、如果养在室外就直接不用管了,养在室内就大概一个星期浇一次水即可。 沙漠玫瑰
推荐理由:耐旱 花美 养护要点: 1、宜放置阳光或散射光充足的地方,到了冬天,宜移入室内栽培。 2、宜用肥沃、疏松及排水良好的砂壤土。 3、大概一个月左右浇水一次,浇水前必须确定盆土的表面完全干燥后方可进行。 结语:以上小编推荐的植物都是很好养活,如果你也爱花,那就赶快快点行动起来吧!
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Miss Chen
09-18
Miss Chen
这个世界上稀奇古怪的事物有很多,特别是一些比较冷门的植物知识,虽然平时用处不是很大,但万一哪天天遇到的了呢,所以了解一下准没错的。 关于植物的10个冷知识 植物小知识 1、油漆过敏的人不能吃芒果 芒果属于漆树科植物,含有单羟基苯或二羟基苯成分,和平时油漆中所含的成分有些类似,当对油漆过敏的人吃了芒果后这些物质就会对他造成刺激作用,特别容易引起过敏。 2、蚊子不喜欢的植物 天竺葵科植物蚊净香草能散发出清新淡雅的柠檬香味,在室内有很好的驱蚊效果,且温度越高,驱蚊效果越好。驱蚊植物还有除虫菊、七里香、逐蝇梅、薄荷、熏衣草、艾叶、夜来香、茉莉花等。但是,为了不影响睡眠,最好别在卧室里放置气味强烈的盆栽植物。 3、野外迷路,能从植物身上得到哪些提示 如果树木不是生长得很浓密,一般可从树干上分辨南北:光滑的一面是南,另一面是北。由树叶生长的方向辨别,一般叶面所朝的方向为南面。由树木的年轮辨别,年轮距离较宽的一方即为阳光充足、能使树木生长良好的南方。还可由石头或树根的青苔辨别,青苔喜欢生长于潮湿的地方,即背阳处,而其反向即为向阳的南方。如果树木浓密的话,一般蚁穴洞口对着的方向为南。 4、花开有声音吗 声音的本质是震动,花朵开放可以产生震动,因此是有声音的,但是这种声音我们人类很难听见。如果你想亲耳听的话,据说雨后的竹子一天能涨40cm高,坐在边上肯定能听到声音。 5、为什么触摸会使植物长不高 20世纪40年代,一位叫Franksalisbury的科学家发现自己量的叶子都比别的叶子短!原来是因为测量的时候,和叶子有接触使叶子变短了。后来又有一个一种拟南芥的实验,结果非常明显,经常被摸的幼苗比对照组矮了一大截! 因为植物有一种叫Thigmomorphogenesis的机制,而这个机制和Calmodulin蛋白有关,这个蛋白和钙离子会控制生长基因的表达。在进化上也比较容易说得通:经常被碰的区域的确应该避而远之。【PS:以后人家再说你咋长不高时,你可以用这篇文章甩他一脸!】 6、为什么落叶多是背面向上 树叶的正面细胞排列整齐、紧密,包含着许多叶绿体,称为栅栏组织。而背面细胞内叶绿体少,排列疏松,称为海绵组织,它比正面轻。正面重于背面,所以树叶飘落向大地的时候,大多数就会背面向上。 7、无花果真的不开花吗 无花果是开花的。它的花在总轴上,这个总花轴的顶端向下凹进去,长成一个肥厚的肉质空心圆球,球顶有一个未封死的小孔。用刀把圆球切开,在空腔周缘的上端可以看到许多小雄花,下端有小雌花,无花果靠虫媒传粉,在开花的季节,有一种虫子从小孔钻进去帮助它传粉。 8、植物也有生物钟 植物和人类一样是有生物钟的,比如植物的开花时间和叶子的睡眠行为就是由植物生物钟支配的,还有植物的呼吸、光合作用、生长速度等多种多样的生理行为都是又生物钟控制的。 9、会发光的植物 由于植物体内有大量磷,当磷和空气接触时,就会发出冷光,如非洲北部的“夜光树”、古巴的“夜皇后花”、我国井冈山地区的“灯笼树”。这种磷光的亮度和树的大小成正比。 10、为什么霜降之后的青菜比较好吃 有些青菜在霜降的时候为了抵御寒冷,会将淀粉类物质转化成糖类,所以霜降过后的青菜会比较甜。
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Miss Chen
09-17
Miss Chen
Baby's breath plants (Gypsophila spp.) have become somewhat of a cliché in floral arrangements. But they also can look lovely in the garden. There are more than 100 annual and perennial species within this genus with varying appearances. Some have a creeping growth habit, forming an attractive flowering ground cover. And others grow in more upright and contained mounds with extensive branching of their slender stems, giving the plants a light and airy feel. Their small, narrow leaves are gray-green to blue-green in color. In the summer, baby’s breath plants are covered in tiny, five-petaled, white or pink flowers that last several weeks. The blooms are known to attract butterflies and other pollinators. Baby’s breath should be planted in the spring after the danger of frost has passed. The plants have a fast growth rate. Botanical Name Gypsophila Common Name Baby's breath Plant Type Perennial, annual Mature Size 2–3 feet tall and wide Sun Exposure Full Soil Type Well-drained Soil pH Alkaline Bloom Time Summer Flower Color White, pink Hardiness Zones 3–9 (USDA) Native Area Europe, Africa, Asia, Australia Toxicity Toxic to people and pets
Baby's Breath Care Baby’s breath plants generally require very little maintenance. Plant them in a spot that gets lots of light and has good soil drainage, and they’ll practically take care of themselves. Plus, they rarely have serious issues with pests or diseases. You’ll typically only need to water during dry spells and feed annually. Once your plants mature, you might need to provide them with support, such as garden stakes, to prevent the thin stems from flopping over. You also can proactively install stakes at the time of planting that the baby’s breath can grow around. These plants don’t need deadheading (removing spent blooms). But they can benefit from a light pruning after flowering, which will help to maintain their shape and might promote another bloom. Light Baby's breath plants grow best in full sun, meaning at least six hours of direct sunlight on most days. But they will tolerate a bit of shade, especially from hot afternoon sun. However, too much shade will result in leggy plants and poor flowering. Soil Baby's breath plants can grow in a range of soil types, as long as they have good drainage. Sandy soil works well whereas wet clay soil does not. So if your soil is heavy, consider planting baby's breath in raised garden beds or containers. These plants also like a slightly alkaline soil pH, so if your soil is acidic sweeten it with an application of garden lime. Water Baby’s breath has low water needs and thrives in dry soil. Keep the soil moderately moist for young plants. But then you typically won’t have to water established plants unless you have an extended period of drought. Overwatering can cause root rot and kill the plant. Temperature and Humidity Baby’s breath can tolerate a range of temperatures within its growing zones. Some species have more cold tolerance than others. These plants prefer a dry climate over a humid one. So if you have high humidity, it’s imperative to make sure your plant has excellent soil drainage and isn’t sitting in constant moisture.
Fertilizer These plants aren’t heavy feeders, and too much fertilizer can cause floppy growth. To promote healthy growth and profuse blooms, simply work some compost into the planting site each spring. Baby's Breath Varieties There is a diversity to the Gypsophila genus that you might not expect if you only know baby's breath from the floral trade. Here are some different varieties of the plant: Gypsophila elegans: This species is considered an annual, but it tends to self-seed and come back in the garden year after year. It features notably large, open blooms compared to other baby’s breath species. Gypsophila paniculata ‘Bristol Fairy’: This cultivar sports double blooms that are white and roughly 1/4 inch wide. It grows in mounds that reach around 2 to 3 feet tall and wide. Gypsophila paniculata ‘Compacta Plena’: This is a compact variety that grows in mounds only around 15 to 18 inches tall and wide. Its flowers are very similar to those on the ‘Bristol Fairy’ cultivar. Gypsophila paniculata ‘Perfekta’: This variety can grow up to 3 feet tall and wide. Its flowers are very similar in appearance to the ‘Bristol Fairy’ cultivar except that they’re around twice the size. Gypsophila paniculata ‘Viette’s Dwarf’: This is another compact cultivar that only reaches around 12 to 15 inches tall and wide and thus typically won’t need staking to keep it upright. It features double flowers in pink that slowly fade to white.
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Miss Chen
09-17
Miss Chen
我们现在吃的水果蔬菜都是经过无数代驯化改良的品种,早在一千多年前的原始蔬菜水果跟现在的相差很大...... 一、香蕉 几十年前,一群科学家在巴布亚新几内亚终于找到了最古老的野生香蕉品种。这就是最早的经过人类优化和培育的野生香蕉。如下图所示:肉质少且硬,籽还多(那些洞洞一样的其实是香蕉籽的横切面)。如果放在今天,简直无法想象它能吃~
科学家发现的最古老的的香蕉品种
香蕉原始品种
现代香蕉 二、西瓜
这幅17世纪的油画,里面的西瓜和现在的还是有些相差的(更像是冬瓜的近亲)。 十七世纪油画中的西瓜 还有酱紫的~
上面的西瓜跟现代的西瓜比起来简直没食欲.....233
三、茄子 据说茄子最早的时候是圆的!下图的就是当时欧洲的茄子,最初也不是紫色的。
原始品种的茄子 经过了好多年的优化培育,茄子才变成了现在的样子。此外,现代茄子的品种也多了很多。
现代茄子 四、胡萝卜
据说这是最早的胡萝卜,长得和树根没两样,古代人说的饿到吃树根充饥会不会就是这种胡萝卜呢? 早在公元10世纪的时候中亚的波斯人在吃,后来才慢慢传入欧洲。传入欧洲的几百年里,胡萝卜的品种被欧洲农民们各种改良。最后才有了现代的红色胡萝卜。
五、玉米 最让人惊艳的是玉米,从最初的一种几乎没法吃的墨西哥类蜀黍植物培育而来的。天然的玉米,如图所示,在公元前7000年开始被人类栽培,是干巴巴的样子,跟稻谷差不多。
直到现在,玉米品种已经被人类改造了9000年,体积大了整整1000倍!只能说,农民和科学家们真的很厉害!
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Miss Chen
09-17
Miss Chen
七色花,又名七色堇。传说中的神奇花卉,是具有七个花瓣的花朵,每片花瓣都呈现不同的颜色,分别为黄、红、蓝、绿、橙、紫、青。寻找到七色花的人,可以让七色花实现七个愿望,每实现一个愿望,花瓣就会脱落一个花瓣。当然,这只是传说,在现实的自然界中是不可能存在这种七色花的。 从生物学角度分析。因为花朵是植物的繁殖器官,如果色彩太杂,反而会使昆虫眼花缭乱,从而降低光顾授粉的概率,从这一点看,七色堇的存在也是有悖于自然规律的。 花语为:诚实的爱,考虑很深的思恋,请思念我。
七色花传说 有一个小姑娘叫珍妮。有一天,她的妈妈叫她到店里去买面包圈。 珍妮买了七个面包圈,爸爸两个,妈妈两个,一个粉红色的给小弟弟,两个带糖的给自己。 珍妮提着一大串面包圈,一边走,一边念着商店招牌上的字,数着天上飞来飞去的乌鸦。这时,一只小狗跟在珍妮后面,它偷偷地把面包圈吃了先吃了爸爸的、妈妈的、小弟弟的,最后吃了珍妮带糖的面包圈。珍妮觉得手里轻了,她扭头一看,哎呀,面包圈全没了也吃光了,旁边一只小狗正舔着嘴呢。 "你这害人的狗,小偷!"珍妮追着小狗,要打它。 珍妮追呀追呀,怎么也追不上小狗,自己也迷路了。她来到了一个陌生的地方。她害怕了,呜呜地哭起来。 忽然,不知道从哪里出来一个老婆婆,老婆婆问她为什么哭啊?"珍妮把一切全告诉了老婆婆。 老婆婆很可怜珍妮,就说:"别哭,小姑娘,我这儿有朵'七色花'它什么事都能办到。我把它送给你,它会帮助你的。" 那朵七色花,有七片花瓣,黄、红、蓝、绿、橙、紫、青。一片花瓣一种颜色。 老婆婆接着又说:"你想要什么,就撕下一片花瓣,扔出去,说:'飞吧,飞吧!我要……,'它就会替你办好。" 珍妮接过七色花,谢了老婆婆。她要回家去,但不知道走哪条路。她急的又要哭了。这时,她想起了七色花,就撕下一片黄色花瓣,把它扔出去,说:"飞吧,飞吧!让我带着面包圈回家去……"她的话还没有说完,手里已经提着一串面包圈,回到家里了。 她把面包圈交给妈妈,就走进房里,想把七色花插进自己心爱的花瓶里。可是一不小心,"花瓶掉到地上,打碎了。 妈妈在厨房里大声说:"珍妮,你是不是把什么东西打碎了?" "没有……"珍妮赶快撕下一片红色花瓣,扔出去,说:"飞吧,飞吧!给我像这一样的花瓶吧……"地上破花瓶的碎片立即又合拢起来。妈妈进来一看,花瓶还好好的。 珍妮来到院子里,男孩子们真在玩北极探险的游戏,他们不肯带珍妮玩。珍妮说:"我自己到北极去!她撕下一片蓝花瓣,扔出去,说"飞吧,飞吧!让我马上到北极去……"话刚说完,忽然太阳不见了,一阵大风吹来,把她吹到北极去了。
珍妮这时穿的是夏天的裙子,光着腿,孤零零地一个人到了北极,那里冷极了,冰天雪地的北极冷极了。 "妈妈,我冻坏了,快来呀!"珍妮哭喊着,眼泪一串串流下来,马上冻成了冰柱子。这时,七只大白熊从大冰块后边蹿出来,向珍妮扑来。珍妮吓坏了,她用冻僵的手指,抓起七色花,撕下一片绿花瓣,扔出去,说:"飞吧,飞吧!快让我回去……"一眨眼功夫,她又在院子里了。 珍妮去找邻居的女孩们玩,她看见她们有好多玩具:小汽车,大皮球,会说话的洋娃娃。珍妮很羡慕,她把一片橙色的花瓣扔出去,说:"飞吧,飞吧,我要好多好多的玩具……"立刻,玩具从四面八方向珍妮拥来了。会说话的洋娃娃堆满了屋子,它们吵得要命;汽车、皮球、玩具飞机、飞艇、坦克、大炮……把整条胡同,甚至连对着胡同的马路都挤满了。 "够了够了!"珍妮吓的抱着头叫了起来。可是,没有用,玩具还在不断的涌来。珍妮连忙撕了一片紫色的花瓣,扔出去,很快的说:"飞吧,飞吧,快叫玩具回去吧!"于是所有的玩具都不见了。 珍妮朝七色花一看,只剩下一片花瓣了。 "哎呀,我把六片花瓣都浪费了,连一点的快乐都没有得到,多可惜呀!这最后的一片可不能随便乱用了。" 忽然,珍妮看见一个小男孩坐在大门口前的板凳上,他有一双可爱的黑眼睛,珍妮很喜欢他,想和他玩。但是小男孩是小跛子,不能跑,不能跳。珍妮想,要让小男孩能够走路!于是,她小心翼翼地撕下最后一片青色花瓣,扔出去,说:"飞吧,飞吧!让小男孩健康起来吧……" 就在那一分钟,小男孩站了起来,同珍妮玩起捉迷藏来了。他跑呀,跑呀,珍妮怎么也赶不上!
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Miss Chen
09-16
Miss Chen
炸弹树,这种树结出来的果实“铁西瓜”可以爆炸,并且爆炸威力近似于小型手雷,是世界上杀伤力最大的树。下面我们一起了解炸弹树吧! 炸弹树,又叫铁西瓜,生长在在南美洲亚马孙河流域,这树会分泌出的汁液含有大量的烃类化合物。如果有人拿着火把走近这些树的话,炸弹树可真的就变成一枚炸弹了。不过这也并非全是坏事。当地的印第安人只要在树上钻些小孔,就可以从每棵树上收取15-20升的汁液。这些汁液竟然可以用作汽车燃料。
炸弹树的威力 炸弹树结出的果实十分坚硬,如柚子般大小,果皮坚硬,呈黄色,比椰子还要坚硬。因为其果实皮厚壳硬,就像一个铁球一样,假如从树上失落下来,绝对可以把人砸晕。 每当果实成熟时会自动爆裂开,锋利的“破片”四处飞射,甚至能飞出20多米,威力如一颗小型手榴弹,杀伤力很是强大。爆炸后经常会在附近发现被炸死的鸟类尸体。 在南美地区,炸弹树花朵的授粉都是由蝙蝠完成的。每当炸弹树果实成熟的季节,当地人都不敢靠近这些树,生怕自己“中弹”。由于这种树过于危险,人们都不会把房屋建在它的附近。 因为炸弹树果实会“爆炸”,所以在一些园林参观,若是有这种炸弹树的话,一般都会很远就围起护栏,免得误伤了前来观赏的游客。
分布范围 炸弹树原本生长在南美洲亚马逊河流域,目前在我国广东、福建、海南、台湾等地有栽培,主要用于园林观赏。所以想看的朋友们,也不必去到亚马逊雨林了。 结语:通过上文的介绍,大家都知道炸弹树是会“爆炸”的,如果你看到炸弹树,记得与它保持距离哦~
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Article
Miss Chen
09-16
Miss Chen
人在高温或剧烈运动之后会出汗,这些汗是通过体表的汗腺排出来的,经过蒸发,使体温降低,是人体的御热机制。其他大多数的温血动物和人一样,也通过汗腺排汗来御热。 动物会流汗不稀奇,但你听说过植物也会“出汗”吗?而且它们在大早晨“出汗”,这是为什么呢? 植物流汗是什么样子的? 相信不少人会见过以下这些情形,在气候潮湿的春末、夏日、秋初的清晨,许多植物的叶尖和叶缘会冒出大量的小水滴。我们一直以为这些小水滴是露珠,其实这并不是露珠! 露珠由空气中的水汽在植物表面遇冷凝结成的水滴,一般分布在叶片的表面。但植物叶尖和叶缘部位的水滴,可不是空气中的水汽遇冷凝结形成,而是从植物体中分泌出来的,也就是文章开头所说的植物的“汗液”。 露珠是水,而植物的“汗液”里含有少量的无机盐和其它物质,和人类的汗水真的很像! 你若不信,可以试着弹掉叶片上的水分,你会发现,叶面上的露珠被弹掉后不见了,而叶尖和叶缘部位的水分被弹掉之后又慢慢冒了出来。
揭秘植物“出汗”之谜 植物为什么会在凉爽的清晨,那么“怕热”而“汗如雨下”呢? 原来,植物通过根部大量吸水,这些水很大部分是需要排出体外的。白天,它们在阳光下进行光合作用,叶面上的气孔张开着,大量的水分就通过这些气孔蒸发掉了,所以我们用肉眼看不到它的“汗水”。可到了晚上,气孔全部关闭,而根却仍源源不断地在吸水。 这样,植物体内的水分就会过剩、膨胀,进而寻找出口,于是叶尖、叶缘上的水孔就成了它们的“闸口”。这些水孔位于叶片的尖缘,与植物体内运输水分和无机盐的导管相通。所以你在清晨见到的植物“汗液”,其实是植物晚间“流汗”的尾声。
露珠是怎么形成的 在温暖季节的清晨,人们在路边的草,树叶及农作物上经常可以看到露珠,露与霜一样,也不是从天空中降下来的。露的形成原因和过程与霜一样,只不过它形成时的温度在0°C以上罢了。 在0°C以上,空气因冷却而达到水汽饱和时的温度叫做"露点温度"。在温暖季节里,夜间地面物体强烈辐射冷却的时候,与物体表面相接触的空气温度下降,在它降到"露点"以后就有多余的水汽析出。因为这时温度在0°C以上,这些多余的水汽就凝结成水滴附着在地面物体上,这就是露。 露一般在夜间形成,日出以后,温度升高,露就蒸发消失了。在世上生活的时间很短。在农作物生长的季节里,常有露出现。它对农业生产是有益的。在我国北方的夏季,蒸发很快,遇到缺雨干旱时,农作物的叶子有时白天被晒得卷缩发干,但是夜间有露,叶子就又恢复了原状。人们常把"雨露"并称",就是这个道理。
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