黄土丘陵区油松根际土化感效应研究  

Allelopathic Effect of Pinus tabulaeformis Rhizosphere Soil in Loess Hilly Area

作　　者：王仙[1,2] 魏天兴[1,2] 朱金兆[1,2] 赵兴凯[1,2] 刘海燕[1,2] 

机构地区：[1]北京林业大学水土保持与荒漠化防治教育部重点实验室,北京100083 [2]山西吉县国家森林生态系统观测研究站,山西吉县042200

出　　处：《中国农学通报》2015年第4期7-13,共7页Chinese Agricultural Science Bulletin

基　　金：国家生态系统观测研究网络运行服务项目(2013-2014);"十二五"国家科技支撑计划项目(2011BAD38B06);林业科学技术推广项目(2014-40)

摘　　要：通过生物测定法研究油松根际土对不同物种的化感效应,以期为油松林的乔灌草复合提供科学依据。设定油松根际土化感效应研究的质量浓度分别为0.5、1、3、5、7、10 mg/m L,测定提取液对油松、刺槐、侧柏、胡枝子、绣线菊、冰草、紫花苜蓿发芽与生长化感效应。结果显示:在所有研究浓度下,油松根际土对刺槐、紫花苜蓿呈抑制效应,且随浓度的加大抑制效应不断加强;对侧柏起促进作用;油松根际土对油松、胡枝子、绣线菊、冰草的化感效应呈低浓度促进、高浓度抑制。因此,从油松根际土化感效应的角度考虑,在油松林营造乔灌草复合植被时,应优先考虑侧柏,慎重选择刺槐、紫花苜蓿,选择复合胡枝子、绣线菊、冰草时应该注意油松林的间伐以及间作的密度。The research aimed to provide a scientific basis of arbor-shrub-herb compound vegetationconstruction in Pinus tabulaeformis Carr forest through studying the potential allelopathic effect of Pinus tabulaeformis rhizosphere soil. The potential allelopathic effects of Pinus tabulaeformis rhizosphere soil ongermination and growth were investigated with 7 plants（Pinus tabulaeformis, Robinia pseudoacacia Linn.,Platycladus orientalis, Lespedeza bicolor Turcz, Spiraea salicifolia L., Agropyron cristatum Gaertn, Medicago sativa L.）, and with different concentrations（0.5, 1, 3, 5, 7, 10 mg/m L）. The results showed that： Pinus tabulaeformis rhizosphere soil aqueous extract inhibited the growth of Robinia pseudoacacia Linn, Medicago sativa L., and stimulated the growth of Platycladus orientalis at each study concentrations. Low concentration of Pinus tabulaeformis rhizosphere soil aqueous extract promoted effect on Pinus tabulaeformis, Lespedeza bicolor Turcz, Agropyron cristatum Gaertn and Spiraea salicifolia L. At high aqueous extract, the stimulatingeffects changed into inhibited. As a result, when arbor-shrub-herb compound vegetation in pine forest isconstructed, people should give priority to Platycladus orientalis, carefully choose Robinia pseudoacacia Linnand Medicago sativa L.. When people choose Lespedeza bicolor Turcz, Spiraea salicifolia L. and Agropyron cristatum Gaertn, pine forest intermediate cutting and intercropping density should be noted.

关 键 词：油松根际土 化感效应 黄土丘陵区 

分 类 号：S791.254[农业科学—林木遗传育种]