过早采脂对湿地松生长及产脂量的影响调查分析

Investigation and analysis of the effect of early harvest on the growth and lipid production of the Pinus elliotti

2014-2015年,本研究对不同采割起始树龄、不同时间起始采脂的湿地松林分春夏梢生长、针叶生长、产脂量等指标进行调查,以分析过早采脂对湿地松生长及产脂量的影响。研究表明,采脂起始时间过早对湿地松的生长和采脂生产都是不利的,树龄23年起始采割比9年起始采割单株松脂收益多将近3倍;每年6月后起始采割比5月起始采割工作量少20%,产量却多10%。不同采脂起始年龄及每年不同时间起始采脂的湿地松松脂收益相差巨大。

The study objects are Pinus elliottii forests with different start rossing ages and different start rossing time of the year.From 2014 to 2015,the spring and summer shoot growth,needle leaf growth and resin yield of the forests were investigated to analyze the effect of premature rossing on the growth and resin yield of P.elliottii.The results showed that too early for resin tapping was unfavorable to the growth and resin yield of P.elliottii.The yield of rosin per plant was nearly 3 times higher at 23 years of age than at 9 years.Each year,the workload of rossing started after June was 20%less than that started in May,but the yield was 10%higher.There were significant difference in the yield of P.elliottii resin at different start rossing ages and different start rossing time of the year.