海拔对毛竹林土壤水分物理性质及叶SPAD值的影响

发布时间：2018-06-30 08:29

  本文选题：水分物理性质 + 容重　； 参考：《西南农业学报》2017年05期

【摘要】：【目的】为了解海拔对毛竹林土壤水分物理性质及竹叶SPAD的影响。【方法】在河北省崇阳县选择2个海拔梯度的毛竹林进行了对比研究,分析其土壤容重、空隙状况、持水性能和叶片SPAD的差异。【结果】随着海拔的升高,土壤容重呈下降的趋势,而土壤孔隙状况(非毛管孔隙度、毛管孔隙度和总孔隙度)和持水性能(最大持水量、毛管持水量和最小持水量)均呈增加的趋势。随着土层的加深,土壤容重增加,而土壤孔隙状况和持水性能下降。海拔对容重、毛管持水量和最小持水量影响显著;土层对容重、最大持水量影响显著。I度竹SPAD值表现为低海拔高海拔,而II度和III度竹则表现为低海拔高海拔;土壤水分物理性质中,容重、毛管持水量和非毛管孔隙度对毛竹叶片SPAD值的影响较大。【结论】海拔梯度造成了土壤水分物理性状的差异,对毛竹生长有一定影响。本研究区高海拔土壤水分物理性质较低海拔可能更适合毛竹分布。
[Abstract]:[objective] to understand the effect of altitude on soil moisture and SPAR of Phyllostachys pubescens forest. [methods] two bamboo forests with elevation gradient were selected in Chongyang County, Hebei Province, and the soil bulk density and gap status were analyzed. [results] with the increase of altitude, soil bulk density decreased, while soil porosity (non-capillary porosity, capillary porosity and total porosity) and water-holding capacity (maximum water holding capacity) decreased. Both capillary water holding capacity and minimum water holding capacity showed an increasing trend. With the deepening of soil layer, the bulk density of soil increased, while the porosity and water holding capacity of soil decreased. The effect of altitude on bulk density, capillary water holding capacity and minimum water holding capacity was significant, and the maximum water holding capacity of soil layer showed significant influence on bulk density, I. the Spad value of bamboo showed high altitude at low altitude, while that of II degree and III degree bamboo showed high altitude at low altitude. In the physical properties of soil moisture, bulk density, capillary water holding capacity and non-capillary porosity had great influence on the Spad value of Phyllostachys pubescens leaves. [conclusion] elevation gradient resulted in the difference of soil moisture physical properties and the growth of Phyllostachys pubescens. The physical properties of soil moisture at high altitude in this study area may be more suitable for distribution of Phyllostachys pubescens at lower altitude.
【作者单位】： 湖北省环境科学研究院;
【基金】：国家林业局林业公益性行业科研专项(201104058)
【分类号】：S714.2
，

本文编号：2085655