不规格方式造林效果分析简

通过在朝阳县荒漠化极重度、重度、中度的山地或坟茔地，采取无规格的随机选点挖穴植苗方式进行造林试验，结果表明：在极重度荒漠化山地采用1年生山杏裸根苗无规格造林，10年后保存率76％，比对照高出26个百分点；在重度和中度荒漠化山地分别采用1．5年生侧柏营养杯小苗和5年生侧柏袋装带土坨大苗无规格造林，10年后保存率分别达到了84％和100％，分别比对照高出42和12个百分点。在特殊的宜林山地采取无规格的随机选点挖穴植苗的造林方式，其造林效果远好于按规格要求定点挖穴植苗造林方式。

Effect Analysis for Irregular Reforestation

In the very severe ,severe ,moderate desertification mountain or tomb of Chaoyang County ,experiments of irregular tree-planting digging with randomly selected point were conducted .Result shows that ：on very severe de-sertification Mountain ,adopting one-year-old bare-rooted apricot without specifications afforestation ,survival rate is 76% ten years later ,and 26% higher than that of the control ;on severe and moderate desertification Mountain ,no specification afforestation adopting 1 .5-year-old seedlings of Platycladus orientalis in nutrition cup and five-year-old bagged seedlings with soil lump ,respectively ,the preservation rates are 84% ＆ 100% ,respectively 10 years later , and 42% ＆ 12% higher than that of the control .On particular mountain suitable for planting ,the effect of tree planting with selected points are optimal than that with tree-planting digging in setting locations according to specifi-cations .