报道了贵州西部竹亚科箭竹属一新种,它被命名为威宁箭竹(Fargesia weiningensis Yi et L.Yang)。这个新种近似秦岭箭竹(F.qinlingensis Yi et J.X.Shao,但秆高达6 m,髓呈锯屑状;秆芽仅边缘具短纤毛;枝条较粗,直径达3 mm;箨鞘背面刺毛较...报道了贵州西部竹亚科箭竹属一新种,它被命名为威宁箭竹(Fargesia weiningensis Yi et L.Yang)。这个新种近似秦岭箭竹(F.qinlingensis Yi et J.X.Shao,但秆高达6 m,髓呈锯屑状;秆芽仅边缘具短纤毛;枝条较粗,直径达3 mm;箨鞘背面刺毛较密,小横脉不发育,箨舌繸毛长达1.5 cm,箨片常内卷,全部外翻;叶鞘纵脉间无小横脉,上部纵脊明显,叶片较大,长达15.5 cm,宽达1.5 cm,易于区别。展开更多
[Objective] The aim was to investigate the rhizome elongation growth of umbrella bamboo （Fargesia murielae） seedlings in China. [Method] The study was conducted in Liangfengya, Shennongjia National Nature Reserve. I...[Objective] The aim was to investigate the rhizome elongation growth of umbrella bamboo （Fargesia murielae） seedlings in China. [Method] The study was conducted in Liangfengya, Shennongjia National Nature Reserve. In the field investigation, six clumps of umbrella bamboo which grow independently were randomly selected and labeled. Rhizome elongation growth parameters, length and diameter of all the ages were measured. The age classes of bamboo rhizome were ascertained by age grade backtracking method. [Result] Field investigation suggested that at seedling phase, rhizome of umbrella bamboo prolonged very quickly under yearly time sequence, following an exponential curve. It indicated that although it was 15 years since the mother population died back, new generation had not been established its stable population yet. [Conclusion] Studying elongation regulation of umbrella bamboo may provide the theory understanding of life cycle of this long lived bamboo species.展开更多
[Objective] The paper was to study the distribution of main nutrients in seedlings of umbrella bamboo (Fargesia murielae) in Shennongjia National Nature Reserve. [Method] The study was conducted in Liangfengya of Shen...[Objective] The paper was to study the distribution of main nutrients in seedlings of umbrella bamboo (Fargesia murielae) in Shennongjia National Nature Reserve. [Method] The study was conducted in Liangfengya of Shennongjia National Nature Reserve. In the field investigation, six clumps of umbrella bamboo grown independently were randomly selected and sampled. The total nitrogen, total phosphorus and total potassium of umbrella bamboo were detected by regular plant analysis method. The age classes of bamboo seedlings were ascertained by age grade backtracking method. [Result] In different organs, N, P, K contents in branches and leaves were significantly higher that than in stems. Along age grades, N and P contents performed "M" shape in branches and leaves, while K content approximately performed as normal distribution. [Conclusion] The nutrients distribution pattern of these seedlings is likely formed by its nutrition mechanism which allocates nutrients according to different needs or by external interference of environmental features. However, the specific causes still need further investigation.展开更多
文摘报道了贵州西部竹亚科箭竹属一新种,它被命名为威宁箭竹(Fargesia weiningensis Yi et L.Yang)。这个新种近似秦岭箭竹(F.qinlingensis Yi et J.X.Shao,但秆高达6 m,髓呈锯屑状;秆芽仅边缘具短纤毛;枝条较粗,直径达3 mm;箨鞘背面刺毛较密,小横脉不发育,箨舌繸毛长达1.5 cm,箨片常内卷,全部外翻;叶鞘纵脉间无小横脉,上部纵脊明显,叶片较大,长达15.5 cm,宽达1.5 cm,易于区别。
基金Supported by the National Natural Science Foundation of China (31070370)~~
文摘[Objective] The aim was to investigate the rhizome elongation growth of umbrella bamboo （Fargesia murielae） seedlings in China. [Method] The study was conducted in Liangfengya, Shennongjia National Nature Reserve. In the field investigation, six clumps of umbrella bamboo which grow independently were randomly selected and labeled. Rhizome elongation growth parameters, length and diameter of all the ages were measured. The age classes of bamboo rhizome were ascertained by age grade backtracking method. [Result] Field investigation suggested that at seedling phase, rhizome of umbrella bamboo prolonged very quickly under yearly time sequence, following an exponential curve. It indicated that although it was 15 years since the mother population died back, new generation had not been established its stable population yet. [Conclusion] Studying elongation regulation of umbrella bamboo may provide the theory understanding of life cycle of this long lived bamboo species.
文摘[Objective] The paper was to study the distribution of main nutrients in seedlings of umbrella bamboo (Fargesia murielae) in Shennongjia National Nature Reserve. [Method] The study was conducted in Liangfengya of Shennongjia National Nature Reserve. In the field investigation, six clumps of umbrella bamboo grown independently were randomly selected and sampled. The total nitrogen, total phosphorus and total potassium of umbrella bamboo were detected by regular plant analysis method. The age classes of bamboo seedlings were ascertained by age grade backtracking method. [Result] In different organs, N, P, K contents in branches and leaves were significantly higher that than in stems. Along age grades, N and P contents performed "M" shape in branches and leaves, while K content approximately performed as normal distribution. [Conclusion] The nutrients distribution pattern of these seedlings is likely formed by its nutrition mechanism which allocates nutrients according to different needs or by external interference of environmental features. However, the specific causes still need further investigation.
