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对赣东北中等立地上的两片６年和９年生、造林密度分别为２５００株／ｈｍ２和１１１０株／ｈｍ２的湿地松林分进行了间伐强度对比试验。５ａ后的结果表明，前者以１２７５株／ｈｍ２，后者以５２５株／ｈｍ２的保留密度，可以显著提高林分的胸径和蓄积生长量，改善立木的径级结构，并能有效地缩短轮伐期。对湿地松林的初植密度和初次间伐龄进行了讨论，认为造林密度１５００株／ｈｍ２左右，１０～１２ａ时作中强度间伐，对培育大径材较为适宜。
The comparison of the thinning intensities between two 6-year-old and 9-year-old stands in middle and northeastern Gansu, and the afforestation densities of 2500 / hm2 and 1110 / hm2, respectively, were conducted. The results of 5 a showed that the former at 1275 plants / hm2 and the latter at the reserve density of 525 plants / hm2 could significantly increase the DBH and accumulated growth, improve the diameter structure of stand and shorten the rotation period. The initial planting density and the first cutting age of the Pinus elliottii were discussed. The planting density was about 1500 plants / hm2 and moderate thinning was carried out at 10-12 a.