| Phyllostachys nidularia Munro is a plant with high economic and ecological value. The results of literature hunting indicated that little numerical analysis ,concerning population structure and growth dynamics ,had been down for Phyllostachys nidularia Munro Based on resource analyzing, this dissertation studied the clone growth and cultivation mechanism by applying the theory and method of colonel plant population ecology. The contents of study included : ramets growth Regularity in Shooting Period, the regularity of rhizome growth and distribution, distinguishing of rhizome age, biomass structure and model, population structure of age, diameter and height class, demography of population, clone growth pattern. The purpose is to provide a theoretical basis and information for resource using of Phyllostachys nidularia Munro, and enrich the research contents of colonel plant population. The main results were as follows:1, Phyllostachys nidularia Munro started shooting on April 8 or so and lasted about 32 days; few shoots emerged at the preliminary stage of shooting, more shoots emerged at the prosperous stage and the last stage of shooting. The situation of shoot emergence lasted longer at the last stage than that at the prosperous stage. The degraded shoot percentage increased at the first and declined later with the time. The height growth of young culm of the earlier cohorts followed Logistic curve, while the later cohorts followed exponential curve. Growth increment in height was affected mainly by temperature.2, The number of live rhizomal buds decreased as the age increases .The length and diameter of roots was long in upper part and short in lower part. Not only the length but also the diameter was longer in left and right part than upper and lower part, but the difference between left and right part of roots was not clear. The relative age of rhizome was nicely estimated by applying morphological character, mature degree of tissue development, regularity of physiological activity.3 , The standing crop of Phyllostachys nidularia Munro population was 252.92g/m2 . The order of the biomass of different age class was that 3-year bamboo >2-year ones>4-year ones>l-year ones>5-year ones. The mathematical models for every organ had been established by applying the model of Y=aDb and Y=aDbHc which could be used for forecasting biomass of Phyllostachys nidularia Munro in certain site condition.4, The paper studied the clone population structure of age, diameter and height class of Phyllostachys nidularia Munro in natural forests. The results shows that : The structure of diameter-class was submitted to normal distribution(Pr>0.15). The structure of height - class was also submitted to normal distribution (Pr>0.15).5, The surviving curve and static life table of Phyllostachys nidularia Munro clonepopulation showed that the population was stable. The surviving curve came between I type and II type, and the expect life-span decreased with the age increases. Dynamic life table of bamboo shoot - young clone population of Phyllostachys nidularia Munro showed that the mortality rate was higher than survival. The surviving curve of bamboo shoot - young clone population of Phyllostachys nidularia Munro also came between I type and II type. Mortality curve of bamboo shoot - young clone population had two climax .The death of most young ramet was at previous stage, and the main reason was the short of nutrition.6, By the method of reverse age-class addition (RAA) and aggregate indices, the dynamics of clone grow pattern of Phyllostachys nidularia Munro clone population was studied . The results were shown as follows: The dynamics of distribution pattern showed a transformation from even, random to clump distribution with time, and the degree of clump dispersion pattern of this population is gradually increased. The pattern scale is approximately 16m2 for Phyllostachys nidularia Munro clone population. The contagion intensity is gradually declined with block increases .In addition .significant changes of contagion inten... |
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