论文部分内容阅读
楸树是紫葳科、梓树属的落叶乔木。楸树木材纹理直、不翘不裂、耐腐朽、耐水湿、切面光滑,易于加工,是我国优良的用材树种。楸树树姿雄伟,叶大荫浓,花大色鲜,又是理想的园林观赏树种。其树皮、叶和种子均可入药,叶子还可喂猪,花可炒食和浸提芳香油。楸树生长较快,若选择适宜的立地条件,造林后加强水肥管理,15年左右即可成材。楸树为喜光树种,幼苗期稍耐庇荫,长至30厘米左右时即需较多的光照。喜温暖湿润气候,不耐干旱,也不耐水湿。喜生长在深厚、肥沃、疏松的中性、微酸性土壤上。一、育苗方法1.播种法:首先应掌握好种子成熟期,当果实变成暗褐色时,立即采集。采后稍加曝晒便可裂开,去荚可得纯种。在选好的圃地上,于3月下旬至4月中旬进行条播。每亩播种2—4斤。条距为2—25厘米,覆土厚度0.5—1厘米,以不见种子为度,不宜过厚,否则种子难于出土。一般播前灌足底
Catalpa tree is Aster Branch, Catalpa is a deciduous tree. Catalpa wood texture straight, no Alice cracking, decay resistance, water wet, smooth section, easy processing, is our excellent timber species. Catalpa tree posture majestic, Ye Daini thick, large fresh flowers, but also the ideal ornamental tree species. The bark, leaves and seeds can be medicine, leaves can also be fed pigs, flowers can be fried and extract aromatic oil. Catalpa tree growing faster, if the choice of suitable site conditions, afforestation and strengthen water and fertilizer management, about 15 years to become a success. Catalpa tree for the light tree species, seedling slightly shady shade, grow to about 30 cm when the need for more light. Hi warm and humid climate, intolerant of drought, not wet. Hi growth in the deep, fertile, loose neutral, slightly acidic soil. First, nursery methods 1. Sowing Law: First of all should have a good seed maturity, when the fruit becomes dark brown, immediately collected. After harvest a little exposure can be split, to pods can be purebred. In the selected garden land, broadcast from late March to mid-April. 2-4 kg per mu sowing. Strip pitch is 2-25 cm, soil thickness 0.5-1 cm, with no seeds for the degree, not too thick, or difficult to unearthed the seeds. The general sowing before the end of sowing