三种地被竹出笋成竹生长规律比较研究

Comparison on Shooting and Growth Characteristics of Three Dwaft Bamboos

对黄条金刚竹(Pleioblastus kongosanensis f.aureostriaus)、鸡毛竹(鹅毛竹)(Shibataea chinensis)和南平倭竹(S.nanpingensis)3种地被竹的出笋、退笋和高生长3种生物学特征进行比较研究。结果表明:黄条金刚竹出笋期历时24 d,出笋后第6天至第16天进入出笋高峰期;鸡毛竹出笋期历时37 d,出笋后第6天至第25天进入出笋高峰期;南平倭竹出笋期历时33 d,出笋后第6天至第21天进入出笋高峰期;3竹种出笋数量和退笋数都呈"少—多—少"的趋势,出笋数:鸡毛竹(278株/m2)>南平倭竹(253株/m2)>黄条金刚竹(141株/m2);退笋数:南平倭竹(74株/m2)>鸡毛竹(63株/m2)>黄条金刚竹(33株/m2);3竹种的高生长都呈现"慢-快-慢"的趋势,呈logistic增长;3竹种昼生长量总体上高于夜生长量,在昼夜24h黄条金刚竹出现2次生长高峰,鸡毛竹出现3次生长高峰,南平倭竹出现1次生长高峰。

Observations and comparisons were conducted on biological properties of shooting, degrading and height growth of Pleioblastus kongosanensis f, aureostriaus, Shibataea chinensis and S. nanpingensis, The results showed that shooting period of P, kongosanensis f. aureostriaus lasted for about 24 days, topped at the 6th to 16th days, shooting period orS. chinensis lasted for 37 days, topped at the 6th to 25th days, and that orS. nanpingensis lasted for 33 days, topped at the 6th to 21st days. Shooting yield of the tested three bamboo species showed the same trend of ＂less-more-less＂ with the order of S. chinensis 〉 S. nanpingensis 〉 P. kongosanensisf, aureostriaus. The quantity order of degrading shoot was S. nanpingensis 〉 S. chinensis 〉 P. kongosanensisf, aureostriaus. Height growth of three bamboo species showed the same law of ＂slow-quick-slow＂ with a curve of S shape. The increment of three bamboo species was higher during the daytime than that in the night. Growth peak of P. kongosanensisf, aureostriaus appeared twice during 24 hours, of S. chinensis three times and ofS. nanpingensis only once.