中文摘要：

2000年8月底至9月底，在北京东灵山地区小龙门林场对2块辽东栎样地中虫损种子下落动态进行了调查。结果表明：2块样地辽东栎种子产量分别高达119．15和91．23颗·m^-2，而2块样地虫损种子较多，分别为49．23和33．38个·m^-2，所占种子库比例分别为36．93％和25．96％；1999年研究发现（阎文杰，2000），2样地辽东栎种子产量为13．09和7．24颗·m^-2，其中虫损种子产量为10．87和5．90颗·m^-2，虫损率高达82．22％和75．43％。2年的观察结果均证实虫损种子在种子雨早期迅速下落，且低产年份的虫损种子在种子库中的比例显著高于高产年份。高比例的虫损种子可能是导致辽东栎实生苗更新率低的重要因素。

英文摘要：

From late August to late September of 2000, an investigation was made on the insect infestation of Quercus liaotungensis acorns in two sampling plots in Xiaolongmen Forest Farm of Dongling Mountain. The results showed that in 2000, the acorn yield in the two plots was 119. 15 and 91.23 seeds · m^-2, but the insect-infested acorns were as high as 49.23 seeds · m^-2 and 33.38 seeds · m^-2, occupying 36.93% and 25.96% of the total, respectively. Our previous investigation in 1999 indicated that the acorn yield in the two plots was as low as 13.09 and 7.24 seeds · m^-2, and the insect-infested acorns were 10. 87 seeds · m^-2（82.22% ） and 5.90 seeds · m^-2（75.43% ）, respectively. In the two years, most insect-infested acorns fell at the early period of seed rain, and the insect-infestation rate was higher in low-yield year than that in highyield year. The high insect infestation of the acorns could be the main factor affecting the seedling regeneration of Q. liaotungensis in this area.