改杨树等行距育苗为大小行距育苗周锦程江苏省宿迁市林业苗圃土地贫瘠，采用传统的等行距（５０ｃｍ×３０ｃｍ）培育杨树苗，合格苗出圃率仅５０％～６０％，且苗木质量不高，造林成活率较低。依据边缘树苗优势现象，我们改用大小行距培育杨树苗，即大行距７０ｃｍ，小行... Poplar and other rows from the spacing of nursery for the line spacing seedlings Zhou Jincheng Suqian City, Jiangsu Province, forestry nursery land barren, the use of traditional spacing (50cm × 30cm) to cultivate poplar seedlings, nursery stock rate of only 50% to 60%, and the quality of seedlings not High, afforestation survival rate is low. Based on the edge of the advantages of saplings, we use the size of the poplar cultivation instead of row spacing, that is, the large line spacing 70cm, small line ...