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权问薇
2018年02月22日
权问薇
[图片]修剪方式之一：打顶、摘心 打顶与摘心要在其生长期内进行。打顶、摘心是会让其养分多分给侧枝，促进侧枝更好的生长。这样可以有效的矮化植株，让侧枝多多生长，打造出较为繁盛的株型。只要是生长期内可以多次进行打顶与摘心。在植物定植后就可以进行一次摘心。 [图片]修剪方式之二：剪去多余枝叶 所谓多余枝叶就是涨势不好，且过于密集的枝叶，修剪过于既可以减少养分的损耗，又可以增加植物的透光度与透气度。这除了有利于植物的生长，还可以改善开花的效果。 [图片]修剪方式之三：时刻进行分枝修剪 此植物的分枝生长能力非常强，要时刻进行修剪，否则分枝过多，会使植物过于密集，不利于生长与植物的健康。 [图片]修剪方式之四：有掉叶地方随时剪掉 发现有叶子掉落，可以直接把此枝条剪去，因其分枝生长能力强，很快就可以生出新的健康分枝。 此植物就是你敢剪，它就敢越长越繁盛，所以友友们在养殖此植物时，一定要敢于修剪，就算修剪不得当，它也会迅速生长出新的枝条来在供你修剪。所以，大胆的去修剪吧。
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张祥明
2018年02月22日
张祥明
[图片]1.温度不合适 一般紫萼距花最适合生长的温度是在18到30度之间，是非常害怕冷冻的，所以在过冬的时候温度需要保持在10度以上，千万不能低于10度了，不然的话，就会让它容易出现干叶。另外在冬天温度降到4度以下也是不好的，它就会进入到一种休眠的状态，如果接近零度的话，还会冻死的。所以温度也是影响它的一方面。 [图片]2.排水不畅 如果浇水太多没有进行及时的排水，或者正常排水时，不怎么通畅，也是很容易促使植株干叶子的。面对这种情况就应该看一下土壤了，可能就是土的透气性有了问题，那就需要进行解决了，排水好了，那么它就不会再出现干叶子了。 [图片]3.光照不够 它一般是比较喜欢阳光多一点的地方，稍微的也能耐受一点阴凉，但是如果你长时间的不给它充分的晒太阳，也是不好的，一般我们对它进行全日照或者是半日照，它都是可以正常生长的，但是你不能让它长时间的处在隐蔽的地方，这样对它的生长也是非常不好的。 4.没有及时的通风 尤其是在夏天的时候，更应该要加强空气的流通，这样就让它本身的温度散发出去，不然通风不畅的话，就会让它出现干叶现象。所以通风也是应该及时的。这样干叶也就自然少了。 [图片]5.没有适当的遮阴 虽然它喜欢光照，但是害怕强光的照射，所以是需要放在比较半荫处进行养护的，或者给它适当的遮阴。尤其是在夏天的时候，千万不能让强烈的太阳光直接对着它晒，虽说让它充分了享受阳光，但是却很容易把它晒伤的，所以必须要进行一定的遮阴。
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权问薇
2018年02月22日
权问薇
[图片]一.过冬的土壤 这类植物害怕土壤积水，无论冬天还是其他季节，所以在选择过程中，应该选择经过合理搭配过的土壤。具体配置是，选择壤土两份，混合一份泥炭土和一份沙子制成土壤，用于养殖。除此之外，为了增加土壤的肥力，可以在配置过程中掺加一些有机肥。如果直接使用土壤种植，可以在里面稍稍加入一部分沙子，改善土质。 养殖过程中出现问题，很可能是土壤的问题，可以对其进行一部分改良，防止里面空气难以流通，导致根部缺氧，最后死亡。 [图片]二.适宜的温度 这种植物对温度要求非常低，在春秋和夏季均可以良好生长，但是到了天气太过寒冷的冬季，就需要稍加注意。长时间的低温就有概率导致植物停止生长，所以需要进行一定措施。一般来说，如果在冬天植物不出现问题，不需要在温度上下功夫。 [图片]三.及时的水肥 水分要求不高，每间隔 3-5天进行一次浇水，不需要太过频繁，在天气比较冷的时候，还可以选择适当降低频率。肥料的需求也不高，可以每隔十天进行一次，只需要稀薄的液肥即可。只要注重肥水管理，很容易就可以养的非常好。 [图片]四.合理的光照 这种植物的适应性非常好，可以在各种阳光条件下正常生长，不需要太过操心。冬天温度比较低，在低温条件下应当相应增加光照，保证植株生长。如果长时间光照不给力，也应当增加光照，改善植株的生长环境。 五.冬天的修剪 由于冬天气温低，光照较少，所以冬天可以对植物进行适当修剪，降低植物生长所需要的能量，保证植物可以安稳过冬。可将植物较弱的枝干、杂乱的枝干以及重叠的枝干剪掉一些，这样可利于植物的生长。
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权问薇
2018年02月22日
权问薇
[图片]一、光照要求： 这种植物是按照叶到花，再到叶，再到花的顺序循环成长的。如果这种植物感受到的光照太少得话，通过生物作用，它所出现的同化物也变得很少；当它感受到的光照太过强烈的时候，这种植物的部分叶子会升温，最大可能是会致使叶子变色的产生，还可能会被灼伤，严重的可能会焦枯。必须要采取一定的遮阴措施来以防花苞变了颜色或者被灼伤的情况的发生。这种植物喜欢阴凉的地方，所以可以把它安置在室内受到光线照射的地方，一定不可以被阳光直接地照射。 [图片]二、温度： 这种植物对温度的要求决定于另外的气候条件。在冬天气候温度都比较低的情况下，室内白天和夜晚的温度比15°C还要低的时候，要适当地给它"保暖"，也就是加温；当温度比13°C还要低的时候，要采用专业的机器比如说加温机来给它保暖，以防它受到冬季的低温冻害。 [图片]三、冬季湿度： 这种植物在冬季不管是不是在较高的室温下都不需要对它有太多的保湿，因为傍晚如果它的叶片太湿润反而会减弱它的对抗寒冷的能力，更容易受到冻伤，对它安稳地度过冬天不好。 [图片]四、冬季的施肥： 这种植物的施肥时间在冬天可以是上午的九点到下午的四点。而且根据种植经验，对这种植物的根部进行施肥的效果要好过施在叶面。因为它的叶面因为有一层蜡质的表层，不利于对营养的吸收。每一次都要由专门的人操作来施肥，严谨地把控好液肥的浓度和施加的份量。
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巴黎铁塔
2018年02月22日
巴黎铁塔
[图片]一、造成叶片下垂的原因： 1、温度高于35℃，或者温度低于10℃，过高的温度或者过低的温度都会对红掌造成伤害。 2、太阳射向红掌叶子的阳光太过于猛烈，光照太强，造成叶子颜色发生改变或者受到烧灼的伤害，甚至还有焦枯的现象发生。 3、水的含盐量过高，浇水频率不适当。夏天高温时浇水频率过少，或者冬天低温时浇水频率过多。 4、空气湿度过低，空气湿度低于百分之五十，会对红掌造成伤害。冬季过多的降温保湿，令夜晚叶子太湿导致降低了红掌的抵抗寒冷的能力，遭到冻害的可能性大。 5、换掉盆子的时候，泥土土质较为紧实，不利于这种植物的生长。 [图片]二、解决方法： 1、把握好室温的调控，红掌最喜欢的成长温度为18℃到28℃，室温不能比35℃还要高，室温最低也不能超过14℃，如果比10℃还低，会令红掌遭到冻害。当然，如果夏季温度超出32℃，那么就需要采取降温的方法，比如说要加强室内环境的通风。对它多施加水分，给它遮阴等等。如果在冬季，当室内温度比14℃还要低的时候要适当的给它增加温度。 2、维持比较高的湿度。这种植物喜欢湿润的空气，抗空气的湿度高的时候更有利于它的成长，高温高湿是最好的生长气候。但当气温低于20℃的时候可以维持室内的温度就好；当气温高于28℃的时候，可以用喷雾来喷叶面增加叶子表层和室内空气的湿润程度。 3、把控好光照条件。这种植物喜欢荫凉，所以，在屋子里可以安置在有一些散光的比较亮堂的地方，一定要注意不要直接把红掌放在被阳光强烈直射的地方。 4、水肥要恰当。红掌对盐含量比较敏感，水的盐分最好是没有，一般用自来水就好。肥料可以溶水一起施。 5、换盆的时候泥土的土质一定要松。 [图片]
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家里的二哈爱吃花
2018年02月22日
家里的二哈爱吃花
[图片]主要病害 这种植株主要遇到的病害枝枯病，一旦发病，再好看的植株也会变了模样。看见这个病的名字峨眉就能知道，病症的枝条渐渐枯萎。的确，发病的时候小枝上会产生褐色的病斑，上面还会生有黑点，然后渐渐枯萎。但是，这是怎么发生的呢，这主要是被细菌感染所致，也就是病原菌分生孢子器，然后进一步侵害植株。 [图片]防治办法 在未栽种之前，一定要选好抗病的品种，这样可以避免它们自身抗力不行而发病。也可以让能抗病的品种很好的繁殖下去。 即便选好了品种，在种植的过程中也是需要精心养护的。首先，要适时的增加有机肥料，这样能提高它们自身的抵抗病菌的能力。在雨水过多的时候，也要及时排水，若是没有及时排水的话，根部是很容易烂掉的，这样患病的几率会变大。 一旦发现病症，一定要及时剪掉已经发病的枝条，枝条也不要随意丢弃，这样可以减少它们传染的概率。所以下最好选择焚烧病枝，彻底销毁这一部分的病枝。 [图片]在病害还没有泛滥的时候，就一定要先行进行药剂防护，可以每半月使用一次蚧螨灵，这样是能铲除掉已经越冬的细菌的。另外，病害已经发生了之后，还可以在处理掉病枝之后用一定剂量的杀菌试剂防治。
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权问薇
2018年02月22日
权问薇
[图片]冬天能开花吗？ 那么在寒冷的冬季，又是否能一探这美丽别致的花朵景观呢？答案是照顾得当的话是可行的，那么下面就让我们来看一下该如何做吧。 关键点一：播种 对于种子的挑选是一定要上心的，种子有问题，怎么也别想红花银桦开出美丽的花朵来。种子的挑选，最好是到健康的母株上去挑选。虽说它适应力强大，根系发达，但最好也要从它的特性喜好上满足它。从它的特性上来说，它更加喜欢生长在微酸土壤中，而且要做到肥沃疏松，还有也要记得及时帮它排水，以免根部腐烂。 关键点二：发芽 要认真地照顾其种子，好使它能正常发芽。到红花银桦的幼苗长出，可以挑选生长差不多的幼苗，保持它们的高度在三到五厘米之间，这样后期会长的较为一致，看起来更为美观。 关键点三：移植 对于这点一定要特别小心，多加留意，伤到根部的话，会对后面的生长产生很大的影响，成活率会大大被降低的。要想使其生长的旺盛，一般三叶盆中可放置五棵以上的幼苗。若是想看起来美观，可挑选颜色素雅高贵青花瓷盆或者古朴大方的陶瓷盆作为它的花盆。 关键点四：后期管理 要是想它生长得美观，就不要将它放置在光线条件不好的地方，会使它的枝条生长的过于夸张了，看起来就不会很好看了。只要把它放置在光照比较充分的地方即可，它的花盆会限制住幼苗的疯长，不会长的太长的。当然了，若是能种在园内地上的话，它还能长到高达三十公尺之上。 那么关于花形出众的它就介绍到这里了，红花银桦还是比较顽强的，只要稍花些心思，它一定能在冬季为你绽开花颜。 [图片]
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Miss Chen
2018年02月21日
Miss Chen
Description: Initially, this herbaceous perennial plant forms a rosette of 4-7 basal leaves that are widely spreading to ascending. These basal leaves are medium green, glabrous, and usually elliptic in shape; they are longitudinally keeled below (and indented above), while their margins are entire (toothless). A mature plant bolts during the late spring orFlowering Spike early summer to develop an erect flowering stalk about ¾–2½' (20-75 cm.) tall. Below the rachis of the inflorescence, this stalk is medium green, terete, glabrous, and up to ¼" (5-6 mm.) in diameter. About 3-5 alternate leaves are located toward the base of the stalk; they are 2-10" (5-25 cm.) long and 4-12 mm. across. These lower leaves are grass-like in appearance, linear in shape, and entire along their margins; they sometimes wither away prior to the blooming period. The upper leaves along the stalk are reduced to little more than sheaths with lanceolate tips. Above the uppermost leaf, both the peduncle and rachis of the floral spike are medium green, terete, and short-pubescent with non-glandular hairs. About 10-40 flowers are arranged along the rachis in either an open or dense single spiral (latter sometimes appearing to be 2 spirals). Individual flowers are 6-10 mm. long, their 3 petals and petaloid upper sepal forming a white tube-like structure with an upper and lower lip. In addition, there are 2 petaloid lateral sepals that are white, linear in shape, and straight, rather than arching; they are also slightly declined and diverge laterally to some extent from the tube-like structure of the flower. The lower lip of the corolla has crisped margins, while the smaller upper lip is less crisped. The interior of the lower lip is pale yellow. There are also solitary bracts at the bases of the flowers. These bracts are up to ½" long (or slightly longer), ovate with tapered tips, light green, glabrous, and more or less erect, curving to the side of the flowers. The flowers are slightly ascending, widely spreading, or slightly descending, and their tubular structures are arch slightly downward. At the base of the lower lip within each flower, there is a pair of minute calli (protuberances) up to 1 mm. long that are narrowly lanceoloid and often slightly hooked. In Illinois, the blooming period occurs during mid- to late summer, lasting about 3-4 weeks for a colony of plants. However, this orchid can bloom earlier in the year in areas that lie south of the state. After the blooming period, the flowers are replaced by seed capsules about 8 mm. in length that are broadly ellipsoid in shape; they eventually release their minute seeds to the wind. The root system is shallow and spreading, consisting of several fibrous roots that are thick and fleshy. Occasionally, clonal offsets develop from the tips of these fleshy roots. Cultivation: The preference is full sun, moist to dry-mesic conditions, and soil containing silt-loam, sandy loam, or acidic rocky material. A little shade is also tolerated. Northern ecotypes of this orchid are winter hardy to at least Zone 5, although it is rarely, if ever, found in cultivation. Plants transplanted from the wild cannot be expected to survive and this should not be done. Range & Habitat: Grass-leaved Ladies' Tresses is native to widely scattered areas in the southern half of Illinois, where it is rare and state-listed as 'endangered.' Illinois lies along the northern range limit of this species. Populations of this orchid in Illinois have been static or slowly declining; it is more common in SE United States. Habitats include rocky open woodlands, grassy meadows, upland prairies, abandoned fields, and roadsides (even lawns in SE United States). Even though this is considered a conservative species, Grass-leaved Ladies' Tresses is sometimes found in areas with a history of disturbance if it is not too severe. Distribution Map Faunal Associations: The flowers are cross-pollinated primarily by long-tongued bees, including honeybees (Catling, 1983). Occasionally, they are also visited by butterflies and skippers, although these latter insects are not regarded as effective pollinators. Nectar is the floral reward for these visitors. The foliage of Grass-leaved Ladies' Tresses and similar orchids is vulnerable to snails and slugs, especially during the early summer when the weather is wet. In addition, the adults of a weevil, Stethobaris ovata, have been observed to feed on the foliage (Raddoch & Raddoch, 2008). The foliage of this orchid is also vulnerable to White-tailed Deer and other mammalian herbivores, and thus the protection of a sufficiently tall fence may be required to prevent such predation. Photographic Location: A prairie in Fayette County, Illinois. The photograph was taken by Keith & Patty Horn (Copyright © 2015). The photographed floral spike has a dense single spiral of flowers. Comments: This orchid is sometimes called Spring Ladies' Tresses because it blooms during the spring in Florida and along the Gulf coast of SE United States. In Illinois, however, it blooms later during the summer. Grass-leaved Ladies' Tresses (Spiranthes vernalis) has some key characteristics that are useful in distinguishing it from other similar species: 1) its lateral sepals are free to the base, straight but slightly declined, and spread laterally to some extent, 2) its flowers are relatively long, usually exceeding 6 mm. in length, 3) the interior of the lower lip of its flowers is pale yellow, rather than white, green, or bright yellow, 4) its flowers are arranged in a single spiral, although this spiral can vary from quite open to quite dense, 5) it is rather tall for species in its genus, and 6) it usually blooms earlier. The more common Nodding Ladies' Tresses (Spiranthes cernua) differs by having its flowers arranged in twin spirals, the peduncle and rachis of its inflorescence have glandular pubescence, the tube-like structure of its flowers is more downward arching or nodding, and usually its lateral sepals are more elevated relative to this tube-like structure. Another species, Slender Ladies' Tresses (Spiranthes lacera), differs by having basal leaves that are more broad in shape, smaller flowers (about 5 mm. in length), and the interior of the lower lip of its flowers is greenish. Yet another species, Great Plains Ladies' Tresses (Spiranthes magnicamporum), differs by having its flowers arranged in a double spiral, the peduncle and rachis of its inflorescence are glandular pubescent, the lower lip of its flowers is pale yellow not only within its interior, but also along its exterior (usually), its lateral sepals are more elevated relative to the rest of the flower and they often arch upward, its flowers are more fragrant, and they bloom later (during the autumn).
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Miss Chen
2018年02月21日
Miss Chen
Description: This perennial plant is usually 4-12" tall and unbranched. There is a rosette of 2-6 strap-like basal leaves that are individually about 3-8" long and 1/3" (8 mm.) across. They are linear to linear-oblanceolate with smooth margins, and usually wither away before the flowers bloom. On robust specimens, there may be 1 or 2 small leaves on the lower flowering stalk. The flowering stalk is up to 1' tall, with 6-12 flowers occurring on the upper half. These flowers are arranged on the stalk as intertwined double spirals – as a result, the individual spirals are not readily discernible. The flowering stalk is light green and covered more or less with white glandular hairs. At the base of each flower, there is a conspicuous green bract that is curved and narrowly ovate. Each flower is about 1/3" (8 mm.) long, consisting of 3Flowering Stalk white sepals and 3 white petals. The upper sepal and upper two petals are fused together and form a curved hood that curls upward at its tip, forming a small upper lip with 3 lobes. The lower petal has a prominent lip that hangs downward and has a crystalline appearance, while the lateral sepals are linear and non-spreading. Together, these sepals and petals form a tubular-shaped flower that nods downward. The blooming period can occur from late summer until the fall, and lasts about a month. There is usually a mild floral scent. Some plants may form cleistogamous flowers. Fertilized flowers are replaced by pods containing the tiny seeds, which are easily carried aloft by the wind. These pods may be capable of photosynthesis while they are green. The root system consists of a cluster of fleshy roots at the base of the plant that are finger-like in shape, and occasional rhizomes may be produced. This orchid can reproduce from the seeds of the flowers, or it may form offsets from rhizomes. Normal growth and development won't occur unless the root system forms an endomycorrhizal association with the appropriate species of fungus. Cultivation: For most ecotypes of this orchid, the preference is full or partial sun and moist sandy soil. Some ecotypes appear to flourish in thin rocky soil that is rather dry. Taller, more aggressive plants can out-compete this orchid for the available light, so it prefers rather open ground vegetation. Starting plants from seed is quite difficult; on the other hand, this orchid is easier to transplant than most others. Cultivars of this orchid species are available from the mass horticultural market, while local ecotypes are next to impossible to obtain. Range & Habitat: Nodding Ladies' Tresses occurs occasionally throughout Illinois, where it is native; for an orchid species, it is fairly common (see Distribution Map). Habitats include moist sand prairies, sandy savannas, areas adjacent to paths in sandy woodlands, shrubby bogs, sandy pannes near lakes, gravelly seeps, limestone glades, bluffs, sandy pits, ditches, and abandoned fields. This orchid typically occurs in somewhat disturbed areas of high quality habitats, and appears to respond positively to occasional wildfires. Individual plants are usually scattered about, rather than forming dense colonies. Faunal Associations: Both long-tongued and short-tongued bees occasionally visit the flowers for nectar. The seeds are too small to be of any interest to birds. The foliage can be eaten by various mammalian herbivores, including rabbits, groundhogs, and deer, while the fleshy roots are probably eaten by pocket gophers when individual plants stray into drier areas. Photographic Location: The photographed plant was growing in a sandy swale at the Indiana Dunes National Lakeshore in NW Indiana. [图片]Comments: While rather small-sized, the bright white spike of flowers provides a striking contrast with the background vegetation and is fairly easy to spot. The individual flowers are attractive, particularly when they are viewed close-up; in particular, the lower lip has an intricate crystalline pattern that can vary significantly from flower to flower. Unlike the Ladies' Tresses orchids that form a single spiral of flowers, such as Spiranthes lacera (Slender Ladies' Tresses), the Nodding Ladies' Tresses falls into the group of Spiranthes spp. with double intertwined spirals that are difficult to discern because of the density of flowers on the spike. The Spiranthes spp. in this group are distinguished from each other primarily by considering the variation in the structure of their flowers and the shape of their leaves. Nodding Ladies' Tresses can be distinguished from these other species by the downward curve of its tubular flowers, providing them with a 'nodding' appearance.
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Miss Chen
2018年02月21日
Miss Chen
Description: This perennial plant is usually unbranched and up to 4' tall. The smooth central stem can be green or reddish. The alternate leaves are up to 6" long and 1½" wide, becoming slightly smaller as they ascend up the stem. They are narrowly lanceolate or oblong-elliptic, smooth along their margins, and largely devoid of hairs. In the upper half of the plant, there are often small leaves that develop from the upper axils of the primary leaves; they have a wing-like appearance. The showy inflorescence is up to 1' long, consisting of an erect panicle of small yellow compound flowers. The flowering stems don't curve outward and downward like many other goldenrods, but are held erect or curve upward. Each compound flower is about ¼" across, consisting of 4-10 ray florets surrounding the disk florets. The spacing of the ray florets tends to be irregular, and they may not open at the same time. These flowers occasionally have a mild fragrance. The blooming period occurs during late summer or early fall, and lasts about a month. Later, the achenes develop small tufts of hairs, and are dispersed by the wind. The root system is fibrous and rhizomatous, occasionally forming vegetative offsets. In older mature plants, a woody caudex develops. Cultivation: The preference is full or partial sun, and slightly moist to slight dry conditions. The soil can contain significant amounts of loam, sand, or rocky material. Occasionally, the leaves succumb to powdery mildew and other kinds of foliar disease, particularly after the blooming period is over in the fall. This plant is easy to grow, but can topple over if it is spoiled by excessive moisture or fertilizer. Habitat & Range: The native Showy Goldenrod occurs occasionally in the northern half of Illinois, and is uncommon or absent in the southern half (see Distribution Map). Habitats include mesic to slightly dry black soil prairies, sand prairies, openings in rocky upland forests, Black Oak savannas, thickets, woodland borders, and abandoned fields. [图片]Faunal Associations: The flowers attract honeybees, bumblebees, ants, beetles, and the occasional moth or butterfly. Among the beetles, are such visitors as Chauliognathus pennsylvanicus (Goldenrod Soldier Beetle) and Epicauta pensylvanica (Black Blister Beetle). These insects seek nectar primarily. The caterpillars of many moths feed on various parts of this goldenrod and others (see Moth Table). Other insect feeders include various leafhoppers, lace bugs, plant bugs, and beetles. To a limited extent, the seeds are eaten by the Eastern Goldfinch and the Greater Prairie Chicken. Mammalian herbivores occasionally eat the leaves, stems, and flowers, including deer, rabbits, groundhogs, and livestock. When this plant is infected by a fungus (Coleosporium sp.), it can cause sickness and death in cattle and horses. Like other goldenrods, it may contain a hemolytic agent that is mildly poisonous to some herbivores. [图片]Photographic Location: The photographs were taken at Meadowbrook Park in Urbana, Illinois. Comments: As the common and scientific names imply, this plant is very showy while in bloom. Showy Goldenrod can be distinguished from other goldenrods that occur in Illinois prairies by the following characteristics, when they are considered together: 1) the flowering stems of the inflorescence are held erect or curve upward, rather than outward and downward; 2) both the stems and leaves are hairless, or nearly so; 3) there are often smaller wing-like leaves in the upper axils of the primary leaves, particularly in the upper half of the central stem, and 4) the leaves lack teeth.
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