南宁低丘松林下3种丛生竹发笋成竹规律  

A Study on Shooting and Growth of Three Sympodial Bam boo Species under Low Hills in Nanning

作　　者：刘军 白天道[2] 陈永力 杨开太[3] 蒋维昕[2] LIU Jun;BAI Tiandao;CHEN Yongli;YANG Kaitai;JIANG Weixin(Guangxi State-owned Qipo Forest Farm,Nanning 21000,Guangxi,China;Forestry College of Guangxi University,Nanning 21000,Guangxi,China;Guangxi Academy of Forestry Sciences,Nanning 21000,Guangxi,China)

机构地区：[1]广西国有七坡林场,广西南宁210000 [2]广西大学林学院,广西南宁210000 [3]广西林业科学研究院,广西南宁210000

出　　处：《福建林业科技》2021年第3期19-24,共6页Journal of Fujian Forestry Science and Technology

基　　金：广西重点研发计划项目(2018AB44025)。

摘　　要：于2019年,在广西南宁市七坡林场开展低丘松林下套种3种丛生笋用竹种(绿竹、麻竹、勃氏甜龙竹)试验,探究3种丛生笋用竹种的造林效果、发笋及幼竹生长规律。结果显示:勃氏甜龙竹的成活率高达83.15%,略高于绿竹(76.6%)和麻竹(62.13%);发笋时间,以勃氏甜龙竹最早(5月中旬),绿竹最晚(6月上旬);发笋持续时间历时最长的为勃氏甜龙竹(180 d),最短的为麻竹(150 d);麻竹的发笋量最高,平均单株母竹发笋率、退笋率分别为2.186、0.115,且以下坡位发笋率略高于上坡位,而退笋率相反;3种笋用竹幼竹高生长均呈现出慢—快—慢的“S”型生长规律,勃氏甜龙竹与麻竹的高生长速率相接近,生长盛期日均高增长量为12 cm;Richards、Gomperz.T方程分别较好地拟合了勃氏甜龙竹和绿竹、麻竹的发笋—幼竹高生长过程。Three sympodial bamboo species(Dendrocalamopsis oldhami,Dendrocalamus latiflorus and D.brandisii)were planted under a pine forest of low hills in Qipo Forest Farm,Nanning,Guangxi in 2019,aim to study their afforestation status,shoot development and heigh growth of young bamboos.The results showed that the survival rate of D.brandisii was 83.15%,slightly higher than that of D.oldhami(76.6%)and D.latiflorus(62.13%).The shooting time of D.brandisii in Nanning was the earliest(Mid-May)while the D.oldhami was the latest(Early June).The longest bamboo shooting period lasted for 180 d(D.brandisii)while the shortest lasted for 150 d(D.latiflorus).D.latiflorus exhibited the highest shooting rate,and the average shooting and degradation rate per one mother bamboo were 2.186 and 0.115.The shooting rate in the downhill position was slightly higher than that in the uphill position,but the shoot degradation rate was opposite.The height growth of three bamboo species showed a tendency of“slow—fast—slow”.Among them,the heigh growth rates of D.latiflorus and D.brandisii were similar and the average daily height increment was 12 cm·d^(-1).The Richards and Gomperz.T equations fitted with the height growth process of shoot—young bamboo of D.latiflorus,D.oldhami and D.brandisii.

关 键 词：绿竹 麻竹 勃氏甜龙竹 发笋 退笋 幼竹高生长 

分 类 号：S795.9[农业科学—林木遗传育种]