论文部分内容阅读
1上海市闵行江川路读者李亭屏问:光棍树系什么树种?习性如何?怎样栽培?冬季小叶片及小枝枯萎是什么原因?答:光棍树(Euphorbia tirucalli)又称绿玉树、光枝树、麒麟树等,为大戟科直立灌木或小乔木。株高可达10米以上,枝肉质具白色乳汁,多分枝,分枝圆柱形、光滑,生长季节具小叶。喜高温高湿,不耐寒,夏季生长迅速,喜光照,能耐半阴。栽培土壤最好应用砂壤土。生长季节每15～20天追肥一次,追肥后中耕。室温低于16℃小叶脱落,低于6℃新枝萎蔫,短时低温也不能忍受。冬季盆土宜偏干,长期过湿会烂根。2 北京市密云县古北口镇河西村读者苏荣吉问:播种的牡丹小苗几年才能开花?花是否退化变异?北京北部是否可露地越冬?答:牡丹种子育苗多用于培育新品种。采收时间需在7～8月,采后及时砂藏,第二年春季播种方能发芽整齐,采收过早以及过嫩、尚未成熟的种子不能发芽或只部分发
1 Shanghai Minhang Jiangchuan readers Li Tingping Q: what kind of tree bachelor? How habitat? How to cultivate? Winter leaflets and twigs wilt What is the reason? A: bachelor tree (Euphorbia tirucalli), also known as green tree, light tree, unicorn tree Euphorbiaceae erect shrubs or small trees. Plant height of up to 10 meters, sticks with white milk quality, multi-branched, branched cylindrical, smooth, with leaflets growing season. Like high temperature and humidity, not cold, rapid summer growth, hi light, to half shade. Cultivation of soil is best to use sandy loam. Growing season every 15 to 20 days top dressing time, topdressing fertilizer. Room temperature below 16 ℃ leaflets off, less than 6 ℃ new branches wilting, short-term low temperature can not stand. Pond soil should be dry in winter, long-term wet will rot roots. 2 Su Rongji, Reader at Hexi Village, Gubeikou Town, Miyun County, Beijing Question: Will the flowering of peony seedlings bloom only a few years after planting? Are the flowers degenerative? Is it possible that the northern part of Beijing will win the winter? A: Peony seedlings are mostly used for cultivating new varieties. Harvest time in July and August, sand storage after the harvest in time, the second spring planting can neat, early harvest and too tender, immature seeds can not germinate or only part of the hair