扦插密度对杨树无性系苗木生长及质量的影响  

Effects of Different Planting Densities on the Growth,Yield and Quality of Poplar Seedlings

作　　者：方升佐[1] 田野[1] 袁发银[1] 

机构地区：[1]南京林业大学森林资源与环境学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2004年第4期1-5,共5页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：江苏省农业三项工程资助项目 (SX( 2 0 0 1) 0 5 1)

摘　　要：对南林 95杨、南林 895杨、NL 1388杨、NL 80 35 1杨不同扦插密度的扦插成活率、叶面积、生物量及生长量指标进行系统观测 ,研究了 1年生苗密度效应的变化规律。结果表明 ,随扦插株行距增大 ,4种无性系的单株叶面积 ,茎、叶生物量及地径均相应增加 ,叶面积指数以 4 0cm× 4 0cm的扦插株行距最高 ,单位面积生物量随扦插密度的增大而增大。随扦插密度的减小 ,苗木质量明显提高 ,南林 95杨、南林 895杨I级苗出苗量以 4 0cm× 5 0cm株行距最高 ,NL 1388、NL 80 35 1杨I级苗出苗量以 5 0cm× 5 0cm株行距最高。结合苗木产量和质量进行综合评定 ,4种无性系的扦插密度以 4 0cm× 5Based on the investigation and analysis data of the survival ratios,leaf area,seedling height and caliper,and biomass of 1-year-old seedlings of clone Nanlin-95,Nanlin-895,Nanlin-1388 clone,and NL-80351 clone,the growth characteristics and seedling quality under different planting densities were studied.The results indicated that the leaf area,stem and leaf biomass,and caliper of seedlings of all 4-poplar clones increased with the decreasing of culture density.Leaf area index at the planting density of 40 cm×40 cm was the highest,and the seedling biomass of unit area raised when the culture density increased.The seedling quality of low planting density was obviously higher than that of high culture density.The first-rate quality seedlings of clone Nanlin-95 and Nanlin-895 were in the largest amount at the density of 40 cm×50 cm,while those of clone NL-1388 and NL-80351 were at the density of 50 cm×50 cm.According to the seedling quality and quantity,the suggested planting density of these 4 clones was 40 cm×50 cm.

关 键 词：杨树无性系 扦插密度 叶面积 生物量 苗木质量 

分 类 号：S723[农业科学—林木遗传育种]