经试验表明:1.湿地松、窿缘桉的幼林抚育对其生长,尤其是对抚育当年的生长有显著作用、抚育后生长加快。但抚育后第二年的生长明显减慢了,因此,造林后头几年,最好每年均进行抚育;2.多施扩大穴与少施扩小穴其生长差异明显,1988年、1989年平均年抽高,湿地松前者是后者的135.7％和136.5％,窿缘桉前者是后者的137.5％和116.7％。因此,幼林抚育以尽可能高的措施为宜。本文还以具体的数字分析了抚育具有较高的经济效益。 The results showed that: 1. Young forest tending of Pinus elliottii and Eucalyptus grandis had significant effects on its growth, especially on its growth in the early years of tending, and accelerated its growth after its tending. However, the growth of the second year after tending was obviously slowed down, so the first few years after afforestation, the best each year for tending; 2. The former was 135.7% and 136.5% of the latter, while the former was 137.5% and 116.7% of the latter. Therefore, young tending should be as high as possible. This article also analyzed the specific figures tending with high economic benefits.