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采用大棚容器根插快速培育苏桐 3号苗木 ,并用小苗当年适时造林 ,能缩短育苗时间 ,培育出干形更好的林木。通过 3a的培育 ,小苗以 5m× 5m株行距造林 ,其平均树高 9 2 9m、胸径 14 1cm ,单株材积 0 0 92 1m3 (蓄积量36 84m3 /hm2 ) ,分别比对照大苗造林增加 2 9 9% ,34 3%和 115 2 % ,生长效益显著提高
The rapid growth of Sutong No. 3 seedlings with a greenhouse container root plug, and timely reforestation with seedlings, can shorten the breeding time, cultivate a better dry-type trees. Seedlings were planted in 5m × 5m rows with average height of 9 2 9m, DBH of 14 1cm and single plant volume of 0 0 92 1m 3 (stock volume 36 84m 3 / hm 2), respectively, which increased by 2 9 9%, 34 3% and 115 2%, the growth efficiency was significantly increased