松嫩平原农业区土壤理化性质与真菌代谢产物——球囊霉素相关土壤蛋白的关系  

Correlation between soil physicochemical properties and fungi-derived glomalin-related soil proteins in agricultural region of Songnen Plain

作　　者：仲召亮[1] 王文杰[1] 王琼[1] 武燕[1] 王慧梅[1] 裴忠雪[1] 任洁[1] 

机构地区：[1]东北林业大学森林植物生态教育部重点实验室,哈尔滨150040

出　　处：《生态学杂志》2015年第8期2274-2280,共7页Chinese Journal of Ecology

基　　金：黑龙江省杰出青年基金项目(JC201401);中央高校基本科研业务费项目(2572014EA01);国家自然科学基金项目(41373075和31170575)资助

摘　　要：对不同土壤深度的真菌特征代谢产物球囊霉素相关土壤蛋白（glomalin-related soil protein,GRSP）与土壤理化性质相关关系的研究,有助于揭示土壤真菌在不同土壤深度对养分的调节作用。本研究在松嫩平原农田5个土层（0~100 cm）采集360个土样,分析了易提取球囊霉素相关土壤蛋白（EE-GRSP）、总提取球囊霉素相关土壤蛋白（T-GRSP）含量和11个土壤理化性质指标及其相关关系。结果表明：表层EE-GRSP和T-GRSP平均含量为0.74和6.0 mg·g-1,随土层加深均呈显著下降趋势;深层土壤养分储量较大,有机碳、全氮、全磷、全钾、碱解氮、速效磷和速效钾储量在深层（40~100 cm）占总储量的41.2%~62.8%;土壤p H、容重、含水量和电导率也表现了明显的垂直变化规律;各理化性质在不同土层与GRSP的相关关系不同,有机碳在全部深度与GRSP均有显著的相关关系,而p H与GRSP均在20~100 cm深度有极显著的相关性（P〈0.01）,且与EE-GRSP、T-GRSP显著相关的理化性质指标分别在60~80、20~60 cm最多,在表层最少;GRSP在深层土壤与各指标的相关性与表层不同,可能会影响GRSP对不同土壤深度养分的调节功能;鉴于深层土壤中GRSP与养分显著相关,本研究提出,种植与土壤真菌具有共生关系的深根性植物是对富集养分的深层土壤进行生物修复的有效方法。Study on correlation between soil physicochemical properties and fungi-derived gloma- lin-related soil proteins （GRSP） at different depths is helpful to uncover the role of soil fungi in different soil layers. In this paper, 360 soil samples were collected at 5 different depths （0-100 cm） in Songnen Plain cropland to analyze EE-GRSP, T-GRSP, 11 soil physicochemical proper- ties and their correlations. EE-GRSP and T-GRSP contents were 0.74 and 6.0 mg ~ g-1 in surface soil, respectively, and both declined significantly with the soil depth. Moreover, the deeper soil layer （40-100 cm） stored 41.2%-62.8% of SOC, total N, total P, total K, alkaline-hydrolyzed N, available P, and available K at 0-100 cm. Soil pH, bulk density, moisture and electrical conductivity also had obvious vertical variation patterns. Obvious differences of correlations be- tween various soil physicochemical properties and GRSP （EE-GRSP, T-GRSP） were found in different soil layers. A significant correlation between SOC and GRSP was found in all layers, and a significant correlation between soil pH and GRSP （P〈0.01） was found in all layers except 0- 20 cm. Most physicochemical properties were correlated with EE-GRSP and T-GRSP at 60-80 cm and 20- 60 cm, while few of such correlations were found in surface soil. These resultsshowed that GRSP may have better correlations with soil properties in deeper soil layers than in surface layer, which affects the function of GRSP in regulating soil nutrients at different depths. We propose that planting deep-rooting ligneous plants that have symbiosis with soil fungi is help- ful for bioremediation of nutrient-affluent deeper soil layers.

关 键 词：松嫩平原 球囊霉素相关土壤蛋白 土壤深度 土壤养分 

分 类 号：S154.3[农业科学—土壤学] S153[农业科学—农业基础科学]