安徽休宁倭竹水分生理及生物量的研究

Study on Water Physiology and Biomass of Shibatae hispida in Anhui Province

休宁倭竹(ShibataeahispidaMcClure)系安徽特有的小型灌木状竹种,通过对该竹种的水分生理、生物量的研究表明:1休宁倭竹的水分利用率较高,为2.76×10-3g/g,虽小于抗旱能力很强的琅琊榆和朴树,但大于抗旱能力较强的青檀和榉树,是湿生树种枫杨的1.49倍,休宁倭竹与榆科树种一样具有较强的抗旱性能;2夏季CO2浓度对水分利用率影响不大,光合速率与水分利用率呈正相关,温度、相对湿度等环境因子影响叶片的气孔导度,也影响了该竹种的光合速率和水分利用率;3休宁倭竹在全光、肥沃土壤环境条件下每1m2活竹可达1300余竿,地上茂密的枝叶截流量大,可减小地表径流;4地下竹鞭发达,纵横交错,形成极为致密的根系网络,地下竹鞭的生物量是地上部分生物量的1.38倍,因此有很强的固土能力。休宁倭竹是一种优良的水土保持竹种。

Shibatae hispida is a provincial peculiar species in Anhui Province, and is fruticose bamboo. Water physiological and biomass analysis indicated: ①The utilization efficiency of water of S. hispida reached 2.76×10^(-3) g/g, less than those of Ulmus chenmoui and Celtis sinensis, but more than those of Pteroceltis tatarinowii and Zelkova schneideriana and 1.49 times higher than Pterocarya stenoptera. The results suggested that the utilization efficiency of water of S. hispida is high, and has a similar drought-resistant ability with Ulmaceae plant. ②During the summer, natural density of CO_2 had no big influence on the utilization efficiency of water but the environmental factors of temperature and relative humidity. ③The density of S. hispida is more than 1 300 culm/m^2. ④The biomass of underground parts is around 1.38 times higher than bamboo aboveground parts,it is very useful for solidifying surface soil. So it is a good bamboo of soil and water conservation