| Based on plenty of wild plot investigations, an experiment, Chinese pine'snatural regeneration is researched in Chaoyang region. Factors are discussed from sitefactor,climate factor,light factor and forest-planting factor. The result shows in sitefactor and climate factor's analyzing, the affect factors on Chinese pine's naturalregeneration sapling quantity in site factors are slope direction＞slope position＞thickness of soil layer＞crown closure; the affection factors on Chinese pine's naturalregeneration sapling growth are slope direction＞slope position＞crown closure＞thickness of soil layer. Gully, as a special micro-landform, has certain influence onChinese pine's natural regeneration, the natural regeneration in gully is better than theone on normal plot which near the gully. Crown closure value range from 0.3 to 0.6have the best regeneration compare with other values. In climate factors, whichinfluence on Chinese pine's natural regeneration most are precipitation andtemperature. Chinese pine's regeneration sapling quantity and regeneration saplinggrowth annual precipitation goup with annual precipitation, annual temperature is notobviously related with Chinese pine regeneration sapling quantity and Chinese pinesapling growth.Analysis between light and Chinese pine's regeneration in different site conditionshows that direct site factor, global site factor affect on regeneration sapling growth issignificant.Pruning,selective cutting,needle-broad-leave-mixed planting improve lightcondition in forest, as pruning stronger, selective cutting wider light index(ISF,DSF,GSF,DirBe)increase. It is increase strongly compare with plot; butneedle-broad-leave-mix-planting change little compare with plot. These tree-plantingmeasure enhance Chinese pine's seedling height growth, leader length growthincrease with pruning intensity and selective-cutting wider. Middle-size intensity,10m selective-cutting affect on annual height growth best.
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