论文部分内容阅读
为了提高山海关杨实生苗的质量，为移植和造林打好基础，该文使用７种（含１个对照）根外追肥方法，对山海关杨实生苗进行了苗期试验，试验采取随机区组设计。结果表明：采用磷酸二氢钾和尿素各占０．２％的混合溶液根外追肥效果最好，除干物质含量外，苗高、地径、侧根数与其它６种处理都有明显差异，其苗高为０．８ｍ，地径为０．４ｃｍ，侧根数为１２．２６条。从苗高看是山海关杨移植苗的最佳高度，为育苗和造林打下了基础。
In order to improve the quality of Yangsheng seedlings in Shanhaiguan and lay a good foundation for transplanting and afforestation, 7 seedlings (including 1 control) were used to study the seedlings of Yangsheng seedlings in Shanhaiguan. The randomized block design . The results showed that the top dressing with 0.2% potassium dihydrogen phosphate (KH2PO4) and urea (0.2%) had the best effect on root top dressing. Except for the dry matter content, the seedling height, diameter and lateral root number were significantly different from those of the other six treatments. Its seedling height is 0.8m, diameter 0.4cm, lateral root number is 12.26. Seen from the height of the seedlings is the best height of Shanhaiguan Yang transplant seedlings, laid the foundation for nursery and afforestation.