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›› 1989, Vol. 25 ›› Issue (4): 297-303.

• 论文及研究报告 • 上一篇    下一篇

干旱灌区群众杨分期造林研究

朱灵益 王葆芳 窦明彦   

  1. 中国林业科学研究院林业研究所;中国林业科学研究院磴口实验局
  • 收稿日期:1987-07-21 修回日期:1900-01-01 出版日期:1989-07-25 发布日期:1989-07-25

AN EXPERIMENT ON THE PLANTING OF POPULUS×XIAOZHUANICA CV 'POPULARIS' IN DIFFERENT TIME IN DRY-IRRIGATED AREA

Zhu Lingyi,Wang Baofang,Dou Mingyan   

  1. Forest Reaserch Instiute, Chinese Academy of Forestry;Dengkou Experiment Bureau, Chinese Academy of Forestry
  • Received:1987-07-21 Revised:1900-01-01 Online:1989-07-25 Published:1989-07-25

摘要: 为了解决干旱灌溉地区春季造林质量问题,我们于1982—1986年每年4月1日至4月30日,每隔5天用群众杨进行一次造林,逐年观察不同年份造林期对成活率、保存率、萌蘖率和生长量的影响。五年试验的结果是:适宜造林期4月5日—4月15日比后期造林4月20日—4月30日(其中以4月20日为对照),造林成活率平均能提高16.4—19.6%;保存率平均提高12.6—18.7%;萌蘖率平均下降52.2—71.3%;树高平均增长1.2—2.1m;胸径平均增大2.0—3.1cm;蓄积量平均增加6.0814—8.9327m~3/ha;生物量平均增加7967—10084kg/ha;一、二级木平均提高32.2—61.7%;叶面积指数增加0.7—1.0倍。

关键词: 分期造林, 萌蘖率

Abstract: After a 5-year (1982-1986) experiment on the planting of Populus×xiaozhuanica cv 'popularis' in different time (planting once every 5 days during the month of April) in the dry-irrigated area in Dengkou county, the result shows that the most appropriate planting time is from 5-15 April. The effect of planting will be unsatisfactory, if it is planted after the date of 20 April. The differences for each item for planting in different times are as follows:1. Populus×Xiaozhuanica cv 'popularis' has acquired a property of sprouting, so that if it is planted earlier or later, the survival rate from 97% to 77%, the preserving rate from 95% to 74% respectively. However, there is no significant difference between them. But the different periods to carry out the planting has a very significant influence on the variation of sprouting rate (4.0-62.0%).2. The yield of wood volume per hectare for early planting (1-10 April) is 12.8-6.9m~3, whereas for later planting (20—30 April) is only 3.8-0.9m~3.3. It is important to handle the proper time for planting. We take the start of blossoming time of apricot as the forecast of the end of planting.

Key words: The planting in different time, Sprouting rate