马尾松人工林抚育间伐起始期的研究

通过对马尾松人工林试验地调查并选取标本木进行树干解析，分析马尾松人工林间伐合理起始期及不同起始期对林分生长影响，结果表明：初植密度高，间伐合理起始期提前，反之，间伐合理起始期推迟。超过间作合理起始期间伐会抑制林木生长。间伐合理起始期可以通过分析胸径加年生长量来确定。

A study on the start time of tending and intermediate cut of Pinus massoniana Lamb. plantation

Based on the surveys of Pinus massoniana Lamb.plantation in study plot,selecting mean sample trees and doing the stem analysis,the start time of rational intermediate cut of the stands and the effects of different start time on the stands growth were analyzed.The results showed that if the original planting density was high,the start time of rational intermediate cut was in advance,on the contrary,be late;if exceeding the start time,the stands growth was inhibited;and the start time was decided by analysis of the growth of DBH(diameter at breast height)in successive years.