小蓬竹水土保持效应的研究

[目的]探究小蓬竹的水土保持特性。[方法]利用典型的喀斯特草地和灌木群落为对照,测定小蓬竹的林冠层、枯落物层、腐殖质层的持水量和土壤物理、化学性质。[结果]小蓬竹群落林冠层、枯枝落叶层和腐殖质层能够截留更多的降水;能够有效的降低林地土壤容重,增加土壤孔隙度,提高土壤自然含水量、毛管持水量和饱和含水量,增强其蓄水保水能力;明显增强土壤的抗蚀性和抗冲性;明显加快土壤的熟化程度,增加土壤肥力。[结论]小蓬竹对增强土壤的固土、保水、保肥能力效果显著。

Study on the Soil and Water Conservation Effect of Drepanostachyum luodianense

[Objective] The purpose of the study was to explore the soil and water conversation characteristic of Drepanostachyum luodianense.[Method] With typical Karst grassland and shrubbery community as CK,the water-holding capacities in forest canopy layer,litter layer and humus layer of D.luodianense and physical and chemical characters of soil were determined.[Result] The forest canopy layer,litter layer and humus layer of D.luodianense community could intercept more precipitation and reduce bulk density of forestland soil,increase soil porosity,enhance natural water content,capillary water-holding capacity and saturated water content in soil,strengthen the water storage and conservation capability of soil,obviously strengthen soil anti-erosibility and anti-scourability,obviously quicken soil ripening degree and increase soil fertility.[Conclusion] The D.luodianense had significantly effect on strengthening the soil-fixation,water and fertility conversation capabilities of soil.