篌竹出笋成竹生长规律研究

对篌竹生长规律进行了研究。结果表明,篌竹出笋时间约始于4月8日,历时约32d,出笋初期出笋少,盛期、末期出笋数较多,但末期持续时间较长,退笋率随着笋期的推移先不断增加后下降。砍伐样方的成竹率比未砍伐样方的高。较早同生群幼竹高生长遵循逻辑斯蒂曲线方程,而较晚同生群幼竹高生长符合指数函数曲线方程,较早同生群的高度高于较晚同生群。

A Study on Growth Regularity of Phyllostachys nidularia Munro in Shooting Period

Phyllostachys nidularia Munro started shooting on April 8 or so and lasted about 32 days in Jurong, Jiangsu province. Few shoots emerged at the preliminary stage of shooting, more shoots emerged at the prosperous stage and the later stage of shooting. The situation of shoot emergence lasted longer at the later stage than that at the prosperous stage. The degraded shoot percentage increased at the first and declined later with the time. The rate of survived culm is higher at cuted experiment plots than that at not cuted experiment plots.The height growth of young culm of the earlier cohorts followed Logistic curve, while the later one followed exponential curve. The culms of the earlier cohorts were higher than that of the later ones.