Trials of 16-26 years old progenies from Yingde Loblolly Pine Seed Orchard were investigated by sample plot investigation.The trial fields were located at Yingde Loblolly Pine Seed Orchard,Yingde Forest Research Insti...Trials of 16-26 years old progenies from Yingde Loblolly Pine Seed Orchard were investigated by sample plot investigation.The trial fields were located at Yingde Loblolly Pine Seed Orchard,Yingde Forest Research Institute,Jiuqushui Forest Farm of Wengyuan County,Shaoguan Forest Farm and Renhua Forest Research Institute respectively.The growth process and performance level were studied by stem analysis based on average trees.Compared with that of local Masson pine(Pinus massoniana),the seedlots of loblolly pine(Pinus taeda) from Hubei and the seedlot of slash pine(P.elliottii) from Taishan Slash Pine Seed Orchard,the growth potential of progenies from Yingde Loblolly Pine Seed Orchard in North Guangdong was comprehensively evaluated.The results are as follows: The fast-growing period of height for the progenies from Yingde Loblolly Pine Seed Orchard began at the age of 3 and lasted for five to nine years.For diameter at breast-height(DBH) it began at the age of 5 and lasted for five to eight years.The fast-growing period for volume in Yingde Loblolly Pine Seed Orchard began at the age of 10 and lasted to 25 years old,while it began at the age of 10 both in Yingde Forest Research Institute and Jiuqushui Forest Farm,and at the age of 12 both in Shaoguan Forest Farm and Renhua Forest Research Institute.The progenies from Yingde Loblolly Pine Seed Orchard performed well generally in North Guangdong.Shaoguan and Renhua were suitable for the cultivation of large-dimension timber with the rotation longer than 25 years.In order to cultivate largedimension timber,suitable fertilizer shall be used when the DBH growth reaches the fast-growing period,and thinning operation shall be conducted when the mean annual increment for DBH reaches the maximum.展开更多
火炬松、湿地松、马尾松、五针松、插穗经 PRA 生根剂处理,可显著提高扦插生根率和大田移栽成活率,四种松树平均生根率达88%以上,大田移栽成活率达90%,3～5a 生幼树插穗生根率达58%以上,把松树无性系育种、无性系林业推向一个新阶段,五...火炬松、湿地松、马尾松、五针松、插穗经 PRA 生根剂处理,可显著提高扦插生根率和大田移栽成活率,四种松树平均生根率达88%以上,大田移栽成活率达90%,3～5a 生幼树插穗生根率达58%以上,把松树无性系育种、无性系林业推向一个新阶段,五针松扦插成功,为塑造五针松微型盆景开辟一条新途径。并筛选出最佳基质和材料。展开更多
文摘Trials of 16-26 years old progenies from Yingde Loblolly Pine Seed Orchard were investigated by sample plot investigation.The trial fields were located at Yingde Loblolly Pine Seed Orchard,Yingde Forest Research Institute,Jiuqushui Forest Farm of Wengyuan County,Shaoguan Forest Farm and Renhua Forest Research Institute respectively.The growth process and performance level were studied by stem analysis based on average trees.Compared with that of local Masson pine(Pinus massoniana),the seedlots of loblolly pine(Pinus taeda) from Hubei and the seedlot of slash pine(P.elliottii) from Taishan Slash Pine Seed Orchard,the growth potential of progenies from Yingde Loblolly Pine Seed Orchard in North Guangdong was comprehensively evaluated.The results are as follows: The fast-growing period of height for the progenies from Yingde Loblolly Pine Seed Orchard began at the age of 3 and lasted for five to nine years.For diameter at breast-height(DBH) it began at the age of 5 and lasted for five to eight years.The fast-growing period for volume in Yingde Loblolly Pine Seed Orchard began at the age of 10 and lasted to 25 years old,while it began at the age of 10 both in Yingde Forest Research Institute and Jiuqushui Forest Farm,and at the age of 12 both in Shaoguan Forest Farm and Renhua Forest Research Institute.The progenies from Yingde Loblolly Pine Seed Orchard performed well generally in North Guangdong.Shaoguan and Renhua were suitable for the cultivation of large-dimension timber with the rotation longer than 25 years.In order to cultivate largedimension timber,suitable fertilizer shall be used when the DBH growth reaches the fast-growing period,and thinning operation shall be conducted when the mean annual increment for DBH reaches the maximum.
文摘火炬松、湿地松、马尾松、五针松、插穗经 PRA 生根剂处理,可显著提高扦插生根率和大田移栽成活率,四种松树平均生根率达88%以上,大田移栽成活率达90%,3～5a 生幼树插穗生根率达58%以上,把松树无性系育种、无性系林业推向一个新阶段,五针松扦插成功,为塑造五针松微型盆景开辟一条新途径。并筛选出最佳基质和材料。
