土壤水分和AM真菌对沙打旺根际土壤理化性质的影响

doi:10.3969/j.issn.1000-1565.2013.05.012

摘要/Abstract

摘要： 为阐明AM真菌对优良牧草和固沙植物沙打旺根际土壤理化性质的影响,本研究设置70％,50％和30％等3个土壤相对含水量,比较了不同水分条件下接种摩西球囊霉(Glomus mosseae)、接种沙打旺根际土著AM真菌(优势菌种为透光球囊霉G.diaphanum,摩西球囊霉和瑞氏无梗囊霉Acaulospora reh-mii)和未接种沙打旺根际土壤理化性质的变化.结果表明:土壤易提取球囊霉素、酸性磷酸酶、碱性磷酸酶、脲酶活性和植株干质量随土壤含水量降低而显著下降,土著AM真菌定殖率随土壤含水量降低而显著提高.不同水分条件下,接种AM真菌显著提高了菌根定殖率、土壤易提取球囊霉素、总球囊霉素、蛋白酶和脲酶活性.土壤相对含水量为30％和50％时,接种AM真菌显著增加了土壤有机质、碱解N、酸性磷酸酶、碱性磷酸酶活性和植株干质量,显著降低了土壤pH值和有效P含量,接种土著AM真菌的土壤总球囊霉素、碱性磷酸酶活性显著高于接种摩西球囊霉的根际土.土壤相对含水量为70％时,接种土著AM真菌显著提高了土壤酸性磷酸酶、碱性磷酸酶活性和植株干质量.土壤水分和AM真菌交互作用对植株干质量、菌根定殖率、土壤pH值、养分、易提取球囊霉素、土壤酶有显著影响.研究表明:接种AM真菌能够促进沙打旺植株生长,改善根际土壤理化性质,土著AM真菌菌根效应优于摩西球囊霉.

关键词: 土壤水分, AM真菌, 沙打旺, 根际, 球囊霉素, 土壤酶

Key words: soil moisture, AM fungi, Astragalus adsurgens Pall., rhizosphere, glomalin, soil enzyme

中图分类号:

S154.4 S154.36

贺学礼,郭辉娟,王银银. 土壤水分和AM真菌对沙打旺根际土壤理化性质的影响[J]. 河北大学学报(自然科学版), 2013, 33(5): 508-513,519.

HE Xueli,GUO Huijuan,WANG Yinyin. Effects of soil moisture and AM fungi on the soil physicochemical property in the rhizosphere of Astragalus adsurgens[J]. Journal of Hebei University (Natural Science Edition), 2013, 33(5): 508-513,519.

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