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Miss Chen
2018年04月27日
Miss Chen
珍珠黄杨是黄杨科黄杨属的常绿小灌木。高不过五尺,粗不盈握,盖因山风寒烈,非千百年不易长成,主干灰褐色,分枝密集;叶小呈紫红、黄绿色,对生,厚革质,有光泽,卵圆形,形似一片片鱼鳞;雌雄同株,花期4月,蒴果8月成熟。该种叶片细密、枝干苍劲、树姿优美、自然成型等诸多特点,是制作盆景、点缀山石、建造袖珍园林的上好材料,自古就与金雀、迎春、绒针柏并称为盆景树种“四大家”。下面来了解下珍珠黄杨盆景图片及养护方法吧。 [图片]一:上盆——避免夏日暴晒 珍珠黄杨上盆四季均可进行,以植株休眠期或梅雨期最佳。上盆的土壤以腐殖土、稻田土或山泥等为主,土壤以微酸、中性或微碱为宜。如对您当地的土壤不太满意,可以植株所带土壤配以三分之一兰花土或蛭石、泥炭等拌和使用。同时可先在土中适当加上少量豆饼或豆屑等,任其在土中发酵挥发成为迟效型养料,使植株缓慢受益。地栽的植株根系十分发达,上盆时可适当剪去部分主根,须根太多也可抽去一些,不要团缩在盆内。上盆时,先在花盆底孔处固定筛网或瓦片,然后放入植株,填入培养土并浇透水份。夏季换盆后起初应放置在荫凉通风的地方。春秋季节则应给予较多光照。 二:浇水——不干不浇,浇则浇透 浇水是珍珠黄杨盆栽养护的主要措施。植株上盆后应浇足或浸透水份,以后可掌握不干不浇、浇(浸)则浇透的原则。所谓干,是指土壤表面开始呈干白状态,而非彻底干透。树木栽植于盆中,泥土总是有限的,所含水分也是有限的,如长期不进行水分补充,树木就会因缺水而掉叶乃至枯萎。一般来说,珍珠黄杨在室内放置时,浇水不需过勤,若浇水过勤,盆土长期过湿,又缺乏通风和充分光照,则易引起根部缺氧而腐烂;同时浇水的次数应根据季节变化、天气冷暖和土壤的透水性而定。浇水可以叶面喷水,也可以根部灌水或连盆浸泡数分钟,注意不要浇“半截水”造成盆面湿、盆内干的现象。如经常外出不便浇水,可视花盆大小,用2-3根棉纱或绒线,将一端从底孔穿入盆内,另一端浸入盆、杯或其他容器内,根据水的自吸原理进行供水。冬季水份蒸发较慢,浸入水中1-2根即可,夏季可适当增加,具体可根据您所在地区的气候条件决定。 三:放置与保护——适当光照 珍珠黄杨为喜荫树种,室内放置以通气透光处为佳。在夏季高温高湿条件下,最好能选择早晚和阴雨天,适当置于户外或阳台。长期荫蔽并通风不畅,易使植株枝叶软弱。珍珠黄杨耐寒性较强,可耐零下20度左右严寒,但对晚秋或早春萌发新枝的植株则应注意保温,最好置于室内,以防产生冻害。 [图片]四:施肥——精肥淡施 盆景的盆钵内土壤是有限的,因而养分也有限,应注意肥料的补充。但珍珠黄杨生长较为缓慢,施肥不需太多、太频繁,每年以初春和入秋两次为宜。珍珠黄杨盆栽施肥以氮为主,一般20cm蓬径的植株,可用黄豆20粒左右或豆饼浸泡并充分腐熟后兑水施入盆土中。施用其他液体肥料注意不可过浓,以免伤根,刚上盆和新翻盆的植株不宜急于施肥。 五:修剪——掌握季节 珍珠黄杨分蘖性极强,随处都有新芽萌发的可能,如任其自然生长,不加抑制,势必影响树姿造型而降低其观赏价值。所以要适时修剪,以保持优美的树姿和适当的比例。但切记:修枝应在秋季植株进入休眠期以后进行。除刚萌发的嫩枝外,盛夏生长期修剪易导致枝稍萎缩。 摘心:对生长过快的树枝,为抑制其高生长,促使侧技发育平展,可摘去其技梢嫩头。摘除花蕾:对于树龄较长的植株,每年8-9月份以后,在其枝干或枝端往往会生出一些珠形的花蕾,如过多,应随时摘去生在枝茎的部分,枝端处留着赏花。这样可避免消耗太多养分,保证植株枝叶繁茂。修枝:珍珠黄杨常在干基上生出新枝条,为保持其造型美观,须注意适当去除。修技方式应根据树形来决定,如为云片状造型,则将枝条修剪成平整状。一般有碍美观的枯枝、平行枝、交叉技等,应予剪去。 六:翻盆——无须太勤 珍珠黄杨根系发达,修剪后新根的萌发力很强,在盆中生长一年以后,须根就能够密布盆底。如数年不翻盆并修剪老根,浇水难以渗透和排出,肥料也不易吸收,将影响植株的正常生长,这时就应考虑翻盆换土。翻盆可用原盆或换稍大一号的盆,根据树木大小来决定。换土可改善土壤的通气透水性,增加土壤养分,有利植株健壮生长,提高其观赏效果。修剪老根则可促使新根萌发,提高根系活力,利于养分吸收。珍珠黄杨换盆所用的土壤和方法与上盆大体相同,翻盆时间可根据以下几方面决定:一般微型盆景每隔1-2年翻盆一次,中盆景2-3年翻盆一次,大盆景4年左右翻盆一次。翻盆可根据根部生长情况来决定,当盆土不干不湿时,将盆倒翻过来,用手拍打盆底,使树木连土带根全部倒出来,检查土块板结情况以及根系分布情况,如土块板结、根系密布土块底面,则说明必须翻盆。翻盆时间四季均可进行,以选择初夏新枝萌发后或梅雨期为最佳。 七:病虫害防治——见了再说 珍珠黄杨除春夏两季偶有可见得的黄杨绢野螟外,少有其他虫害。危害症状为局部叶片变黄,发现后只要及时捉除或以敌百虫等普通农药喷施即可。珍珠黄杨病害发生,参照瓜子黄杨的病害特点,如叶面出现黑色斑点、小枝枯萎等症状,有可能是枝枯病或叶斑病,可用多菌灵、代森猛辛等广普杀菌剂溶液间隔5-7天连续喷洒3-4次。 八:珍珠黄杨叶片颜色四季各异,休眠期多光照可使叶色变红,否则仍会保持绿色。 以上就是小编为您介绍的珍珠黄杨盆景图片及养护方法,希望能够帮助到您。
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Miss Chen
2018年04月26日
Miss Chen
Cucumbers have become a common staple in many kitchens due to their wide array of uses. They can be pickled, eaten raw or added to sandwiches and healthy green smoothies. Lemon cucumbers do not look like traditional cucumbers. They are bright yellow, baseball-sized, round and similar in appearance to lemons. Since lemon cucumbers mature faster than traditional cucumbers, they are good plants to grow in large pots fitted with a small trellis for support. Step 1 Prepare the 15-inch pot at least one month before using. Fill the pot with equal parts vegetable potting soil and aged manure and then cover with black plastic sheeting. Place the pot outdoors in full sun so the black plastic has ample time to warm the potting soil. Lemon cucumbers, as well as all other cucumber varieties, do not like cool soil. [图片]Step 2 Pour seed-starting mix into two or more 3-inch peat containers. You may use more or fewer peat containers according to how big you wish your lemon cucumber container garden to be. Put the peat containers on top of a tray or two or plates. The containers need something underneath them to catch the draining water. Step 3 Push two lemon cucumber seeds into the soil of each container, spacing them 1 inch apart. Cover with soil mix and water until wet. Move the container and trays to a warm area until the lemon cucumber seeds sprout, keeping the soil damp. Step 4 Remove the black sheeting from the outdoor container when temperatures rise above 70 degrees Fahrenheit. Dig into the soil in the 15-inch container with a garden spade to create a hole large enough to hold the 3-inch peat container. Step 5 Insert the peat container into the planting hole and push the soil firmly to secure the pot into the dirt. Water the lemon cucumber plant and insert a round, wire cucumber cage to support the growing plant. Provide the cucumber plant water daily since containers lose more moisture than in-ground plants. [图片]Step 6 Dilute fish emulsion with equal amounts of water and pour into a spray bottle. Spray the solution onto the growing lemon cucumber plant one or two times every month.
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Miss Chen
2018年04月26日
Miss Chen
Companion planting is the practice of planting certain vegetables next to one another to maximize positive effects of each plant. For example, basil is a good companion plant for tomatoes because it camouflages the tomato scent, thus protecting it from predatory insects. But just as some plants have a positive impact on each other, some plants negatively affect each other and should be planted in different parts of your garden. Tomatoes [图片]Tomato is one of the most popular garden vegetables, but it is not always a good companion. Cauliflower, peas, corn and broccoli are just a few vegetables that get a negative effect from its tomato plant neighbors. Many times vegetables don't grow well together because they compete for the same nutrients. In other cases, such as tomatoes and corns, both attract worms that thrive in similar habitats. Fennel and potatoes have a negative effect on tomatoes. Strawberries [图片]Strawberries are a popular addition to many vegetable gardens, but they are not always a positive addition. Broccoli, cabbage, cauliflower and Brussels sprouts should not be planted with strawberries. The fruit plant uses great amounts of nitrogen and phosphorus from the soil, depleting the nutrients the other plants need. When plants compete for the same nutrients, one or the other -- sometimes both -- do not thrive. Beans and Potatoes [图片]Avoid planting root crops such as potatoes next to other root crops -- they compete for nutrients at the same depth. Other vegetables negatively affected by growing next to potatoes are zucchini, tomatoes, summer squash and pumpkins. Those plants require more watering, while potatoes require less watering. If over watered, plant tubers began to rot and attract bugs that are harmful to the other plants. Beans naturally adjust nitrogen levels in soil, so avoid planting near plants, such as broccoli, onions and kohlrabi that thrive when planted in soil with a higher nitrogen content. Organic Myth or Real Science? Though gardeners have been practicing companion planting for centuries, there's no specific scientific data proving that the method makes your garden plants thrive. Gardening expert Louise Riotte writes that companion planting is something the scientific community is beginning to take a closer look at the gardening practice. But companion planting is more than just folklore. Organic gardeners who use companion planting stand firm that mutual benefit of certain plants, such as tomato and basil, keep pests at bay and increases garden production. Companion planting also uses scientific methods by relying on plants such as beans to fix nitrogen levels in soil.
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Miss Chen
2018年04月26日
Miss Chen
Broccoli is a cool-season brassica (related to cauliflower and other cole crops) that prefers temperatures between 65 and 75 degrees Fahrenheit. It matures quickly, allowing gardeners to grow it in both spring and fall. To get a head start on spring planting, however, broccoli seeds are sown indoors, then transplanted into the garden after the last annual frost date, following a brief hardening-off period. [图片]Step 1 Select a sunny indoor location, such as a greenhouse or a south-facing window that receives several hours of sunlight. Alternately, purchase a grow-light. Most regular indoor lights are not sufficient to grow broccoli indoors. Step 2 Purchase or mix your own seed starting soil, or seedling soil mix. This mix should be light, well-draining, and fertile. If making your own, include compost both for fertility and to ensure the mix has a light, well-draining texture. Step 3 Fill a seedling tray with seed starter soil. If you will be growing the broccoli indoors for a long time, and are concerned about insufficient room for the roots as the broccoli ages, sow seeds in pots instead. The optimum depth is about a quarter inch, spacing about 3 inches apart. Step 4 Moisten the soil with a water spray bottle to prevent moving the seeds around or flushing them. Keep soil evenly moist until germination, and keep soil temperatures closer to 75 degrees for fastest germination. After germination, temperatures are more favorable closer to 60 degrees. [图片]Step 5 Transplant to the garden or to the final growing area when broccoli has four to five true leaves, roughly four to six weeks after planting seeds. The first two leaves that broccoli produces during germination are not true leaves. Step 6 Grow broccoli to maturity indoors only if you have a growing area that receives at least six hours of direct sunlight every day, or with grow lights timed to provide at least six hours of light per day. Each broccoli plant will need approximately three feet of growing space for a large head, less for a smaller head that is harvested twice. Ensure that broccoli has at least 6 to 12 inches of soil depth for roots to grow in, or grow broccoli hydroponically according to your hydroponic system specifications.
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2018年04月26日
Miss Chen
Shallots have a delicate and slightly sweet taste similar to both onions and garlic. Since purchasing market shallots tends to be expensive, gardeners are discovering the ease and simplicity of growing shallots themselves. Shallots offer the grower an inexpensive way to have a ready supply of this onion relative for a fraction of the store price. Shallots grow in a similar fashion to garlic. Gardeners are able to move shallots grown in containers to different locations to protect them from excessive heat. [图片]Step 1 Prepare the shallot containers four to six weeks before the last frost. One shallot clove grows comfortably in a container 6 inches in diameter. The containers must have adequate drainage holes in the bottom. If the containers do not, use a drill bit on a power drill to make the required drainage holes. Step 2 Fill the containers with a mixture containing equal parts potting soil and leaf mold. Substitute bagged compost, sold at garden centers, for the leaf mold if the organic matter is unavailable. Step 3 Separate the individual shallot cloves from the larger shallot bulb with gentle pressure from your thumb. [图片]Step 4 Insert one shallot clove, root-end downward, into the potting mixture. Plant the clove shallowly so the tip is level with the soil. Shallot cloves buried too deeply under the soil find it difficult to produce sprouts strong enough to break through. Step 5 Transport the shallot containers to an area in full sun. Shallots prefer full sun but also thrive in partial shade if the afternoon heat of summer becomes extreme. Step 6 Water the shallot cloves with a gentle spray to avoid displacing the soil and exposing more clove than necessary. Continue to water the shallots once per day to avoid the soil from drying out. Step 7 Feed the shallots a diluted solution of general fertilizer during the middle of the growing season, following package instructions. Most fertilizer guidelines instruct you to use equal parts fertilizer and water for proper dilution. Step 8 Harvest the shallots when the green foliage has yellowed and wilted over. Scoop the shallot bulbs out of the soil by using your hands or a garden fork to raise them above the dirt.
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2018年04月26日
Miss Chen
Onions are a popular home vegetable garden plant. Like all vegetables, they may eventually go bad if not stored properly. The proper storage method for your onions depends on where they come from, particularly whether you've purchased them from the grocery store or grown them yourself. Storing onions in the fridge is just one option. [图片]Before Storing Onions should be dried or cured before they go into storage to prevent rot. This can be done in any location that is dry, warm and well-ventilated, like a garage or outdoor patio, and takes two to three weeks. The tops, or green part of the onion, should be cut off about 1 inch above the onion and discarded, and any onions that are rotten should be thrown out. If you intend to braid the onions, the tops can be left on. Storing Onions can be stored in your refrigerator or in a cold storage room. The temperature in the refrigerator or cold storage room should be between 32 and 40 degrees Fahrenheit with moderate humidity, between 65 percent and 70 percent. Ensure that the temperatures do not drop below freezing. Depending on the variety, onions can last for weeks to several months when stored like this. For example, Spanish onions will last weeks while Copra onions can last for months. [图片]Materials Onions should be stored in materials that allow air to circulate around the bulbs. Burlap and mesh are good storage options, as are the netting-like bags that onions are kept in at the grocery store. If the tops have been left on the onions, they can be braided together and the onions hung from rafters or the wall. Cut Onions If already cut pieces of onion are used later, the strong gasses that the onion releases that makes people cry will be much less severe. Raw, cut onions should not be left out overnight as they can attract bacteria.
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Miss Chen
2018年04月26日
Miss Chen
雀梅在园林中可用作绿篱、垂直绿化材料,也适合配置于山石中,这种植物适应性强极强,对土质要求不严,酸性、中性和石灰质土均能够适应,并且耐旱,耐水湿,耐瘠薄。经过细心修剪打理的雀梅盆景会成为最受人们喜欢的盆景植物之一,且有盆景“七贤”之一的美称。下面就一起来看看雀梅盆景的养护7要点吧! [图片]雀梅盆景由于土少肥薄,易受外界气候的影响和病虫的侵袭。因此要做好修剪、施肥、浇水、换盆、防寒和病虫防治等工作;并控制生长,以保持树型的优美姿态。 1.雀梅树桩盆景常年均可进行整枝修剪,随时剪除有碍造型的徒长枝、过密枝,使树桩保持优美的形状,枝叶疏密得当,通风透光,减少病虫害的发生。 2.施肥:雀梅盆景可用饼肥、厨房废料放在缸中密封发酵后,取其上层肥水加水4~5倍稀释浇施。雀梅是喜酸植物,应在沤制的肥水中加入1%的硫酸亚铁才施用;雀梅发芽时喷施1~2次浓度0.1%的尿素;开花前后喷施1次0.1%~0.2%磷酸二氢钾等。 3.浇水要注意不使盆土过湿或过干。伏天早、晚各浇1次水。为缩短枝叶,使形态更为美观,可在春、夏生长期适当控水。 4.雀梅盆景3~4年翻盆1次,以春季萌芽前进行为宜,翻,盆时适当剪去部分老根枯根及过长过密的根系,换去1/2的旧土,培以肥沃疏松的培养土,以促进新根生长发育。 5.雀梅盆景耐寒力较差,易受冻干枯,甚至死亡。故冬季应置于室内,并注意通风,室温保持5℃以上;室温超过25℃时,可打开窗户,避免因高温造成徒长;当室温低于5℃时,可套塑料保温(温室高于5℃即除去塑料袋)室温低于0℃时,应采用热水升温等增温方法,保证雀梅盆景安全越冬。 6.遮阳:雀梅盆景泥土少、根浅,烈日暴晒容易使嫩芽、嫩梢、嫩叶等被晒伤或晒死。因此,夏季必须遮阳,架搭荫棚或放入室内、屋檐下、树荫处等没有阳光直射的地方。 7.雀梅盆景容易遭到病虫为害。主要害虫有:茶长卷叶蛾,可用35%伏杀磷乳剂2000倍液喷杀;天牛,可涂以石硫合剂杀之;介壳虫,可人工刷洗除之。 [图片]雀梅盆景制作方法 1.播种繁殖。雀梅种子完全成熟时,采集后播于疏松肥沃、排水良好的沙质土(潮泥沙)或腐叶土中。出苗后,到第3年10月开始带土移栽于圃地,一般播种6年后才能上盆培育。若用播种繁殖,培育成苍劲古雅的雀梅树桩盆景,至少需要10年以上。 2.造型。刚采掘的雀梅树桩,必须适当修剪,如是野生的雀梅,需经过一定时期的培育,蓄养枝条,才能加工造型。 ①树桩采运回后,根据盆钵的大小和树桩生理习性,进行适当修整,用0.3%~0.5%高锰酸钾或500~800倍液多菌灵、绿乳铜、托布津等溶液涂抹枝干伤口或浸渍树根,然后栽入圃地,浇透水。在老桩和枝干上包扎苔藓或青草,用白乳胶或植物油涂抹枝干伤口,再用薄膜封扎大伤口。 ②新芽萌发后,除去包扎覆盖老桩和枝干的苔藓或青草,以免影响芽的生长。此时地下部分尚未生根,必须架搭荫棚并加强水分管理,以减少叶面水分蒸发和防止嫩芽晒伤。芽长到1~2厘米时,摘去部分不合适和过密的芽,确保留下的芽生长茁壮。摘芽可分3~4次进行。 ③采掘的雀梅树桩完全成活后(即培养到第2年9~10月后)要根据树形的特点反复观察研究,构思造型,然后加工。 ④初步加工。雀梅树桩完全成活后,在适当少水分少肥的情况下,多次带土移栽,使根系回缩,同时对根和枝进一步修剪,以形成盆景的骨架。应注意充分发挥其自然美和保留枝干上的棱节、皱纹、嶙峋及苍老奇特。多干的应考虑高低、大小、远近、疏密的变化及前后、左右的呼应关系。同时有主干、主枝需要作变曲加工的可在这一时期进行。经过初步加工的雀梅树桩再经1~2年培养,即可上盆定植,以后再作进一步细致加工。上盆宜在春季萌芽前进行 ⑤细致加工。按照对雀梅盆景的构思设计,采用以下3步进行艺术加工: 修剪 将雀梅过长的枝干截短,促使剪口下的侧芽萌发生长,这样能使雀梅树桩在1年中发2~4次梢,可以增加分枝级数和缩短每级枝序间的距离,使树桩尽早成型。以后在维持其优美造型的基础上,将过多过密的枝条剪除,使雀梅树桩正常生长。 绑扎 根据雀梅枝条的粗细选用合适的铁丝、钢丝或铝丝,包好一层纸或布条,按调整的方向缠绕在枝条上,进行弯曲。也可用棕丝或棕绳绑扎,将枝干弯曲后用棕丝或棕绳吊扎牢。注意无论用金属丝或棕丝绑扎,每隔3~4个月得松绑1次,避免枝条加粗后,铁丝等陷入树皮而影响树的生长及外形。 提根 培养露根的雀梅桩景,可在较深的盆中或圃地中,下层放肥土,上层为沙土,使新根扎入肥土中,隔一段时间除去一部分沙土,移入选好的浅盆中,使之悬根露茎、苍劲有力。
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Miss Chen
2018年04月26日
Miss Chen
沙漠玫瑰虽然名字中带着“玫瑰”,沙漠玫瑰却跟玫瑰的大花苞样子一点儿没有关系。沙漠玫瑰为多年生肉质植物。它有多个别称,例如:天宝花、富贵花、沙红姬花、亚当花、矮性鸡蛋花,在欧美地区常被称为称沙漠蔷薇或沙漠杜鹃。沙漠玫瑰来原产非洲肯尼亚、塞内加尔至中东阿拉伯一带的沙漠地区。 沙漠玫瑰是近些年来新兴起的室内盆栽观赏植物,它较为耐干旱,因此养殖起来并不困难,那么沙漠玫瑰的养殖方法是怎样的呢? [图片]沙漠玫瑰的养殖方法 一、沙漠玫瑰的主要用播种及扦插方法繁殖。播种以春季为佳,用点播法,以便于出苗后管理。播种前,一定要对基质进行消毒。出苗后,注意播盘中基质不能过湿,否则可能根部腐烂而造成大批幼苗死亡。扦插以生长旺盛季节为好。把枝段剪成10厘米左右,下端浸放水中,把切口处的黏液稀释,以防胶结而影响发根。可插入沙床或直接插入已消毒的栽培基质中,约15~30天可生根。在繁殖时,建议用播种方法繁殖,这样植株根茎能自然膨大形成良好的株形。扦插苗则不能,还会大大降低观赏价值。 二、另外,在栽培中,沙漠玫瑰枝条易徒长,影响株形美观,可用嫁接的方法改变其株形。可在植株一定高度按一定形状将枝条全部剪下,再取剪下的枝条的上端,用劈接法进行嫁接。经嫁接处理的植株株形美观,开花后则花枝紧凑,观赏性强。 三、沙漠玫瑰比较耐干旱,每次浇水量不可过多,如果水分较多,则很容易引起根部腐烂,同时枝条也徒长,修剪起来比较麻烦。夏季高温时,可根据土壤状况来浇水。一般两三天浇水一次,盆内不能积水。冬季气温降低,沙漠玫瑰也随之进入半休眠期,这时要适当的控制浇水,注意保持土壤的干燥,一周浇水一次就可以了。适当干旱非常有利于沙漠玫瑰的生长。【冬季沙漠玫瑰进入休眠期时叶片会逐渐脱落,这是正常落叶,不必为此紧张。】 四、沙漠玫瑰比较喜欢磷钾肥,平时一个月左右补充一次。夏季生长旺盛期则需要肥水充足,这样开出的花才能繁茂、鲜艳。另外结合每年一次的换盆,还可以在盆内适当施加一些长效的基肥,如腐熟的豆饼、骨粉等。沙漠玫瑰比较喜欢磷钾肥,平时一个月左右补充一次。夏季生长旺盛期则需要肥水充足,这样开出的花才能繁茂、鲜艳。另外结合每年一次的换盆,还可以在盆内适当施加一些长效的基肥,如腐熟的豆饼、骨粉等。 五、沙漠玫瑰的修剪工作也非常重要,如果不注意平时的修剪,任其徒长,很容易就失去了观赏价值。花期过后是修剪的最好时节,可以根据个人喜好进行取舍。注意:分枝多,开花就多,要想得到更多的花,就要想办法多留分株。 [图片]沙漠玫瑰养殖注意事项 1、沙漠玫瑰的叶斑病较重,严重时可造成大批叶片脱落,可用25%的多菌灵可湿性粉剂500倍液,50%的托布津1000倍液防治 2、沙漠玫瑰的主要虫害是介壳虫。发生严重时导致叶片全部脱落,植株生长点坏死,甚至植株死亡。家庭栽培要注意观察,一但发现马上用棉签沾水将其擦除。也可在产卵期和孵化期用40%氧化乐果乳油1000~2000倍,或50%杀螟松乳油1000倍喷雾1~2次。【进行病虫害防治时,要注意用药安全。】 3、养护要点: 【良好的日照】 【30℃左右的温度】 【盆土干燥后才浇水】 【春夏雨季适量施肥】 【适当时候下盆土及换盆】 沙漠玫瑰叶子发黄的原因 1、买来不久,处于适应期,少量黄叶很正常也很常见。 2、阳光过于荫蔽,但也切记勿暴晒,叶片也容易发黄,并且影响开花。 3、通风不良、光照不充足,势必会黄叶,严重者还会出现全株腐烂死亡现象。 4、施肥过多,应适量施肥,不可多施。 5、盆土中有蚯蚓或金针虫(红蜘蛛、甲壳虫)等害虫,也会出现叶黄症状。 6、叶斑病和根腐病危害,叶斑病发生严重时可造成大批叶片脱落 7、花盆不透气,盆大根小时,避免盆土长期潮湿,造成根系腐烂。 8、温度低时,冬天会处于一个休眠期,就是叶子变黄且掉叶子,甚至掉成光杆。 9、其比较耐干旱,每次浇水量不可过多,如果水分较多,则很容易引起根部腐烂,造成叶黄。 最后,需要特注意的是:不管是处于适应期、还是休眠期,均应控制浇水,暂停施肥。等春季大量发新芽的时候在根据生长情况补充追肥。冬季可放于阳光充足的位置,并保持盆土干燥,最低温度不可低于8℃。其他季节可放于阳光照射区,不可置于阴暗处养护,否则即使是浇水、施肥正常也会因光照少而黄叶脱落。 沙漠玫瑰什么时候开花? 首先说明,沙漠玫瑰开花需要一定的树龄,太小的不会开花。 1、沙漠玫瑰如果此时已有花蕾而不开放,则是缺乏肥料(每次浇水时以淡淡的肥水代替清水即可,花蕾现色则需要停肥)、环境温度过低(建议升高至15~25℃)、光照不足(需要放于充足处)。 2、沙漠玫瑰此时没有花蕾,则是树龄太小,或是新修剪后没有长出足够的枝长! 3、再说,沙漠玫瑰的花芽分化还需要日常管理中合理的浇水、施肥、光照、温度来共同实现! 沙漠玫瑰有毒吗 沙漠玫瑰肯定是有毒性的,不过,它的乳汁毒性是最强的,但是,沙漠玫瑰是可以在室内养护的,切记,只要不误食就行了。
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