灌溉、磷肥及AM真菌互作对紫花苜蓿地土壤养分的影响  

Effects of irrigation,phosphate fertilizers,and arbuscular mycorrhizal fungal interaction on soil nutrient content in alfalfa fields

作　　者：孟翔 刘伟[1] 褚皓清 颜安[1] 谢开云 孙伶俐 赵越[1] MENG Xiang;LIU Wei;CHU Haoqing;YAN An;XIE Kaiyun;SUN Lingli;ZHAO Yue(College of Grassland Sciences of Xinjiang Agricultural University/Xinjiang Key Laboratory of Grassland Resources and Ecology/Key Laboratory of Grassland Resources and Ecology for Western Arid Desert Rengion,Ministry of Education Urumqi,Xinjiang 830052,China)

机构地区：[1]新疆农业大学草业学院/新疆草地资源与生态重点实验室/西部干旱荒漠区草地资源与生态教育部重点实验室,新疆乌鲁木齐830052

出　　处：《草业科学》2023年第5期1220-1231,共12页Pratacultural Science

基　　金：新疆维吾尔自治区重点研发项目(2022B02003);国家自然科学基金(31660604)。

摘　　要：土壤养分是影响紫花苜蓿(Medicago sativa)优质高产的重要因素。为探究灌溉、磷肥和丛枝菌根(AM)真菌对紫花苜蓿土壤养分的影响,本研究设置调亏灌溉(RDI)和定额灌溉(QI)两个灌溉处理,磷肥0(P0)、60(P1)、120(P2)和180 kg·hm^(−2)(P3)4个肥力梯度,以及AM(土壤不灭AM真菌)和–AM(土壤灭AM真菌)两种处理。结果表明:定额灌溉处理提高了根际土壤和非根际土壤有效磷含量,施磷肥和AM处理均显著增加了土壤中全磷和有效磷含量;在0-20、20-40和40-60 cm土层紫花苜蓿根际土壤有效磷含量均大于土壤有效磷含量,说明丛枝菌根真菌对紫花苜蓿根际土壤和非根际土壤有效磷含量有重要贡献。Soil nutrient content is an important factor affecting the quality and high yield of alfalfa(Medicago sativa).In order to explore the effects of irrigation,phosphate fertilizers,and arbuscular mycorrhizal(AM)fungi on soil nutrients in alfalfa fields,two irrigation treatments,namely regulated deficit irrigation(RDI)and quota irrigation(QI),four fertility gradients generated by applying 0(P0),60(P1),120(P2)and 180 kg·ha−1(P3)of phosphate fertilizer,as well as two treatments,namely AM(soil can not kill AM fungi)and–AM(soil can kill AM fungi),were set up in this study.The results showed that QI treatment increased the available phosphorus content in rhizosphere and non-rhizosphere soil,and the application of phosphorus fertilizers and AM treatment significantly increased the total phosphorus and available phosphorus content in the soil.The available phosphorus content in rhizosphere soil at 0-20,20-40 and 40-60 cm layers was higher than that in non-rhizosphere soil,indicating that AM fungi contributed considerably to the available phosphorus content in alfalfa rhizosphere and non-rhizosphere soil.

关 键 词：调亏灌溉 定额灌溉 施磷 丛枝菌根 根际土壤 土壤全磷 土壤有效磷 

分 类 号：S541.9[农业科学—作物学] S158