摘要
采用1.0m×1.0m样地逐株测定及全生物量收获法研究了黎平县狭叶方竹林的林分结构与生物量组成。结果发现其林分平均地径0.706cm、平均高度141.8cm、平均立竹度307500株/hm~2,新生竹株数占比0.32,竹鞭分布深度3~5cm,总芽量700000牧/hm~2、壮芽量210000牧/hm~2。平均地径、平均高度、立竹度、总芽量和壮芽量密度值有随海拔高度升高而增加的趋势,壮芽量比值的变化趋势相反。新竹地径(D_0)-高度(H)的直线型(H_1)和幂函数型(H_2)模拟式为H_1=185.62D_0+13.088、H_2=189.74D_(00.8848),老竹的相应值为H_1=237.29D_0-28.844、H_2=208.84D_(01.2531),可应用于径-高关系的预测。狭叶方竹林干重生物量变幅9.12~24.56吨/hm~2、平均值14.93吨/hm~2,有随海拔高度升高而生物量值增加的趋势。干重生物量的构件排序为秆(37.23%)>叶(16.53%)>鞭(14.81%)>枝(11.62%)>篼(11.16%)>根(8.65%),地上部分(65.38%)>地下部分(34.62%)。为狭叶方竹林开发提供了一定理论依据。
The stand structure and biomass composition of bamboo forest of Chminobambusa angustifoliain Liping county were studied by 1.0 m×1.0 msample plot and total biomass harvesting method.The results showed that the forest had an average diameter at ground (DAH) of 0.706 cm,an average height (H) of 141.8 cm,an average standing density (N) of 307500 plants/hm~2,and the proportion of new bamboo plants was 0.32.The bamboo rhizome distribution depth in soil was 3-5 cm,and total buds (TB) was700000/hm~2 in which strong buds (SB) was 210000/hm~2.DAH,H,N,TB and SB increased with the elevation increasing,but the ratio of SB was in the opposite direction.Linear (H_1) and Power function (H_2) simulation equations of DAH (D_0)-H of new bamboo was H_1=185.62 D_0 +13.088 and H_2 =189.74 D_ (00.8848),the equations of old bamboo were H_1=237.29 D_0-28.844 and H_2=208.84 D_(01.2531),which could be applied to the prediction of DAH (D0)-H relationship.Dry weight biomass of the bamboo forest varied by 9.12-24.56 Tons/hm~2 with an average value of 14.93 Tons/hm~2,and the biomass value increased with the elevation increasing.Component dry weight biomass were ranked as stem (37.23%)> leaf (16.53%)>rhizome (14.81%)> branch (11.62%)> basket (11.16%)>root (8.65%),and overground part (65.38%)>under-ground part (34.62%).It provides a theoretical basis for the development of the bamboo forest of Chminobambusa angustifolia.
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