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。
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.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1989年第4期297-303,共7页
Scientia Silvae Sinicae
关键词
杨
造林
成活率
保存率
萌蘖率
The planting in different time
Sprouting rate
