梁山慈竹结构调整研究

Study on Structural Adjustment of Dendrocalamus farinosus Forest

以梁山慈竹为研究对象，开展了年龄结构、留养母竹株数、母竹大小和基株密度对梁山慈竹生长特征的影响研究。结果表明：梁山慈竹结构特征对新竹胸径增长率、繁殖率和生物量增长率有重要的影响。其中，在年龄结构1—2级具有较大的胸径增长率、繁殖率和生物量增长率；梁山芯竹留养3-4株／丛母竹具有最大的繁殖率和生物量增长效率，较大的胸径增长率；梁山慈竹留养母竹平均胸径在4．30cm具有最高的繁殖率和生物量增长率，较大的胸径增长率；梁山慈竹基株密度在889—1550g／hm2时胸径增长率较大，在889丛/hm2时繁殖率和生物量增长率达到最大值；分株密度5333株／hm2时繁殖率和生物量增长率达到最大。梁山慈竹合理结构模武为：基株密度889—1550丛／hm2，单株密度5333株／hm2，每丛留养母竹3—4株，平均胸径4．30cm，年龄结构为1年生竹：2年及2年生比例小于1．49。

Abstract：In this paper, taken Dendromlamm farinosus as tasted objects, the effects of the different age classes, mother bamboo number, mother bamboo＇ s DBH and bamboo density of Dendrocalammfarinosus on its growth characteristics were studied in Changning county of Si- chuan province. The result showed that the DBH growth rate, reproductive rate and biomass growth rate of D. far/nosus were affected by its stand structures, of which the DBH growth rate, reproductive rate and biomass growth rate of D. fadnosuJ were higher from I to 2 age class. The reproductive rate and hiomass growth rate of D. far/nosus were the highest with 3 -4 mother bamboos, and the DBH gnm＇th rate was higher. The reproductive rate and hlonmas growth rate d D. fadnosu were the highest with 4.3 cm of mother bamboo＇ s DBH, and the DBH growth rate was higher. The DBH growth rate of . farnosus was higher with the genets density from 889 to 1550 clump per hectare, and the reproductive rate and biomass growth rate were the highest with 889 clump per hectare. The reproductive rate and blomaas growth rate of D. farinosus were the highest with 5333 trees per hectare. The recommended reasonable structure mode： the genet density d D. far/nos~ was from 889 to 1550 clump par hectare, the ramets density ofD. fadnosus was 5333 trees per hectare, 3 -4 trees per hectare mother bamboo, age structure was 0 - 1. 49, and the average DBH was 4.30 cm.