两个金银花品种根系对土壤物理性状影响的对比研究

采用分层挖取根系方法调查两个金银花品种秧花、蒙花的根系分布,同时测定植被下不同深度土壤的水分含量、土壤容重、土壤孔隙度、土壤持水量等土壤物理性状指标。结果表明:秧花根系主要分布在0～20cm土壤中,占总根系生物量的97.9%以上;蒙花根系主要分布在0～30cm土壤中,占总根系生物量的99.0%以上。秧花的吸收根系分布对土壤水分具有一定影响,吸收根集中分布区域下层土壤含水量虽仍在增加,但增加的趋势有所减缓。吸收根集中分布深度的比较发现,蒙花明显大于秧花。研究结果表明,两金银花品种根系的分布对土壤物理性状均有一定影响,并与对照样地有一定差异。

Study on influence of root system to physical character of two honey suckles varieties

Uses the lamination method to dig takes the root system to investigate two honey suckles varieties root system distribution,simultaneously determines the different depth soil physics character targets under the vegetation,such as the soil moisture content,the soil density the soil porosity,moisture～holding capacity and so on.The result indicated that,The rice shoot flower root system mainly distributes in 0～20 cm soil,occupies the total root system biomass above 97.9%;The Mongolian flower root system mainly distributes in the 0～30cm soil,occupies the total root system biomass above 99.0%.Although the rice shoot flower＇s absorption root system distribution had certain influence to the soil moisture,the absorption root centralism distributes the region lower level soil moisture content still to increase,increased the tendency had the slow～down.The absorption root centralism distribution depth comparison discovered that,hoodwinks the flower obviously to be bigger than the rice shoot flower.The findings indicated that,two honey suckles varieties root system＇s distribution has the certain influence to the soil physics character,and has certain difference with the comparison open area.