Spatial distribution patterns of Quercus liaotungensis population in Lingkong Mountains;

Insect infestation of Quercus liaotungensis acorns in Dongling Mountain of Beijing;

Comparisons on leaf traits of Quercus liaotungensis Koidz.on different slope positions in Dongling Moutain of Beijing;

Gap characteristics and its effects on community regeneration of Quercus liaotungensis forest on Loess Plateau;

Soil physical properties and leaf photosynthetic characteristics in three stands,Betula platyphylla forest,Quercus liaotungensis forest,and Betula platyphylla-Quercus liaotungensis mixed forest,which were located in the secondary zone of Ziwuling Forest of the Loess Plateau,were studied.

By means of the standard-timber harvesting methods, the bicycled quantities and bio-cycle patterns of nutrient elements and the stand biomass in Quercus liaotungensis forest, Pinus tabulaeformis forest and artifical Robinia pseudoacacia forest, the dominant communities in warm temperate zones were studied with Ziwulin Mountain lying in Hilly Loess Regions as the research area.

This paper studied the soil physical-properties under Populus davidiana, Quercus liaotungensis, and Populus davidiana-Quercus liaotungensis mixed forest in the Ziwuling forest asea of Loess Plateau, and the leaf photosysthetic characteristics of these three types of forests.

Acorn removal of Liaodong oak (Quercus liaotungensis)by rodents;

The article researches on two forest fires happened in Zuoquan County of the middle of Taihang Mountain in the spring of 1998,and then draws a conclusion that the fireproof effect of the mixed forest of Chinese pine and Liaodong oak is better than that of the purebred forest of Chinese pine.

We investigated food hoarding behavior of white-bellied rats by providing them with wild apricot(Prunus armeniaca)seeds and Liaodong oak(Quercus liaotungensis)acorns within enclosures(L ×W ×H = 4× 3× 1 m)in the Dongling Mountains (40°00′N, 115°30′E), Men.