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于2016年7月10日,在山东省东营市河口区一千二保护站附近,选择了5块采样地,采集柽柳(Tamarix chinensis)地上部、地下部和根周土壤样品,分析柽柳扎根深度、地上部生物量、地下部生物量和根系分层生物量的关系,并测定土壤含水量、土壤容重和土壤水溶性盐含量等理化性质。研究结果表明,在不同采样地,柽柳根系扎根深度变化范围较大,在距离海边最近的采样地E,柽柳扎根深度最深,在距海最远的黄河故道西侧的采样地B,柽柳扎根深度最浅。不同采样地中柽柳根系生物量与土壤深度的相关系数都大于0.921,并随着土壤深度增加,呈负对数关系减小。柽柳根系生物量更多分布在浅层土壤中,在0~30 cm深度土壤中,根系的生物量占总生物量的70%以上。柽柳地上部生物量和地下部生物量呈幂函数关系,相关系数为0.791 5,表现出稳定的生长比例。在不同环境条件下,柽柳根冠比差异明显,与土壤含水量、距海距离、土壤盐度和土壤水溶性盐含量显著相关。主成分分析结果表明,土壤水溶性盐含量是柽柳根冠比最主要的影响因子。
On July 10, 2016, five sampling sites were selected in the vicinity of the 112 Protection Station, Hekou District, Dongying City, Shandong Province to collect soil samples from aboveground, underground and root of Tamarix chinensis, , The aboveground biomass, the biomass of the lower ground and the stratified biomass of the root system. The physico-chemical properties such as soil water content, soil bulk density and soil water-soluble salt content were determined. The results showed that in different sampling sites, the root system of Tamarix andraeanana had a wide range of rooting depth. In the sampling site E closest to the beach, the root depth of Tamarix elongata was the deepest. At the sampling site B to the west of the old course of the Yellow River from the sea, The most shallow. The correlation coefficient of root biomass and soil depth in tamarix was greater than 0.921 in different sampling sites, and decreased with the increase of soil depth. The root biomass of T. ramosissima was more distributed in shallow soils, and the root biomass in the depth of 0-30 cm was more than 70% of the total biomass. The biomass of aboveground and underground biomass of T. tamarisse showed a power function relationship with a correlation coefficient of 0.791 5, showing a stable growth ratio. Under different environmental conditions, root and shoot ratio of tamarisk was significantly different and significantly correlated with soil moisture content, distance to the sea, soil salinity and soil water-soluble salt content. Principal component analysis showed that soil water-soluble salt content was the most important factor affecting root-shoot ratio of tamarix.