摘要
为研究渤海沙质海岸不同防护林下土壤理化性质及草本植物多样性的变化,以辽宁省葫芦岛市绥中县沙质海岸的6种典型防护林(油松纯林、油松刺槐混交林、杨树纯林、刺槐近熟林、刺槐中龄林、刺槐幼龄林)为研究对象,通过测定土壤理化性质和草本植物多样性相关分析,揭示了不同林分类型土壤理化性质及草本植物多样性的变化规律。结果表明:6种林分类型能降低土壤密度、毛管孔隙度、总孔隙度、pH值,可增加土壤含水量、全氮量、有效磷含量。刺槐纯林对土壤的改良效果最好,使土壤含水量增加62.9%,土壤全氮增加28.5%,土壤有效磷增加314.4%,pH值降低36.1%;不同林分类型草本植物多样性有一定的差异,油松刺槐混交林的草本植物多样性效果最好,丰富度指数、Simpson多样性指数、Shannon-Wiener多样性指数、Pielou均匀度指数和Alatalo均匀度指数与对照相比分别增加200%,77.1%,88.9%,25.9%和24.6%;丰富度指数、Simpson多样性指数、Shannon-Wiener多样性指数、Pielou均匀度指数和Alatalo均匀度指数基本上与土壤密度、毛管孔隙度、总孔隙度、全氮量、有效磷含量呈正相关,与体积含水量、pH值呈负相关,其中,丰富度指数与毛管孔隙度显著负相关,Simpson多样性指数、Pielou均匀度指数与pH值显著负相关。
In order to research the changes of soil physical and chemical properties and plant diversity under different shelter forests in the Bohai sandy coast. 6 forest types （Pinus tabuliformis pure forest, Pinus tabuliformis-Robinia pseudoacacia mixed forest, Populus spp. pure forest, nearly mature forest of Robinia pseudoacacia, middle aged forest of Robinia pseudoacacia, young forest of Robinia pseudoacacia） in Suizhong County, Huludao, Liaoning Province, were selected as the study objects. The changes of different forest types on soil physical and chemical properties and herb diversity were revealed by measuring soil physical and chemical properties and herb diversity. The results showed that 6 forest types could reduce the soil density, capillary porosity, total porosity and pH value, and increase soil volumetric water content, total N and available P. The effect of Robinia pseudoacacia pure forest on soil improvement was best, which increased soil volumetric water content of 62.9%, and increased total N of 28.5%, and increased available P of 314.4%, and reduced pH value of 36.1%. Different forest types had different herb diversity, and the effect of Pinus tabuliformis-Robinia pseudoacacia mixed forest was best, which increased richness index, Simpson diversity index, Shannon - Wiener diversity index, Pielou evenness index and Alatalo evenness index of 200%, 77.1%, 88.9%, 25.9%, 24.6%, respectively, compared with the control. Basically the richness index, Simpson diversity index, Shannon -Wiener diversity index, Pielou evenness index and Alatalo evenness index were positively correlated with the soil density, capillary porosity, total porosity, total N and available P, while they were negatively correlated with soil volumetric water content and pH value. The richness index was significantly negatively correlated with capillary porosity and total porosity, and Simpson diversity index and Pielou evenness index were significantly negatively correlated with pH value.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2016年第6期673-680,共8页
Journal of Shenyang Agricultural University
基金
辽宁省农业攻关及产业化资助项目(2015103002)
辽宁省自然科学基金项目(201602663)
辽宁教育厅基金项目(L2014480)
中央财政林业科技推广项目(辽[2015]TG14号)
关键词
沙质海岸
防护林
土壤理化性质
草本植物多样性
sandy coast
shelter forest
soil physical and chemical properties
herb diversity
