镁改性生物炭配施磷肥对红壤磷有效性及小麦产量的影响  

Effect of combined application of magnesium modified biochar and phosphorus fertilizer on phosphorus availability and wheat yield in red soil

作　　者：吴行 郑琴 张帅 成宇阳 王秀斌[1] WU Hang;ZHENG Qin;ZHANG Shuai;CHENG Yu-yang;WANG Xiu-bin(Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081;Beijing Geological Engineering Design Institute,Beijing 101500)

机构地区：[1]中国农业科学院农业资源与农业区划研究所,北京100081 [2]北京市地质工程设计研究院,北京101500

出　　处：《中国土壤与肥料》2022年第3期84-90,共7页Soil and Fertilizer Sciences in China

基　　金：国家重点研发计划项目(2018YFD0200502)。

摘　　要：利用盆栽试验探究镁改性生物炭和磷肥配施对红壤磷素有效性及小麦产量的影响,试验设置对照(CK)、单施磷肥(P)、单施镁改性生物炭(MgBC)和磷肥配施镁改性生物炭(P+MgBC)4个处理。结果表明,单施镁改性生物炭或单施磷肥均可增加土壤有效磷(AP)含量,且两者配施其含量显著高于单施。P+MgBC处理土壤AP含量较CK、P和MgBC处理分别显著增加90.4%、34.2%和59.5%,且土壤AP含量与磷酸酶(Pho)活性、微生物量磷(MBP)及土壤有机碳(SOC)呈显著正相关。与CK处理相比,MgBC和P+MgBC处理小麦产量均显著增加,其中P+MgBC处理产量增幅最大,平均增加27.1%,但P处理其产量较CK处理差异不显著。P+MgBC处理的小麦植株和籽粒磷含量较CK和P处理均显著增加,但与MgBC处理无显著差异。P+MgBC处理的小麦植株和籽粒磷吸收量较其他处理均显著增加,增幅范围分别为40.6%~114.3%和18.7%~58.6%。综上,与单施磷肥或单施镁改性生物炭相比,镁改性生物炭配施磷肥,不仅提高了红壤磷素有效性,还提高了小麦产量和吸磷量,为酸性土壤作物系统磷肥高效利用提供了一定的理论依据。The effects of combined application of magnesium modified biochar and phosphorus fertilizer on phosphorus availability and wheat yield in red soil were studied.Four treatments were set up,including control(CK),single application of phosphorus fertilizer(P),single application of magnesium modified biochar(MgBC)and phosphorus fertilizer combined with magnesium modified biochar(P+MgBC).The results showed that the application of magnesium modified biochar or phosphorus fertilizer alone increased the content of soil available phosphorus(AP),and the content of soil AP in the combined application of magnesium modified biochar and phosphorus fertilizer was significantly higher than that in the treatment of magnesium modified biochar or phosphorus fertilizer alone.The content of soil AP in P+MgBC treatment was significantly higher than that in CK,P and MgBC treatments by 90.4%,34.2%and 59.5%,respectively,and the content of soil AP was significantly positively correlated with phosphatase(Pho)activity,microbial biomass phosphorus(MBP)and soil organic carbon(SOC).Compared with CK treatment,the wheat yield of MgBC and P+MgBC treatments increased significantly,among which the yield of P+MgBC treatment increased the most,with an average increase of 27.1%,but the yield of P treatment was not significantly different from CK treatment.The phosphorus content of wheat plants and grains treated with P+MgBC was significantly higher than that of CK and P treatments,but there was no significant difference with MgBC treatment.The phosphorus uptake of wheat plants and grains treated with P+MgBC increased significantly compared with other treatments,with an increase range of 40.6%~114.3%and 18.7%~58.6%,respectively.In conclusion,compared with single application of phosphorus fertilizer or single application of magnesium modified biochar,magnesium modified biochar combined with phosphorus fertilizer can not only improve the phosphorus availability of red soil,but also improve the yield and phosphorus uptake of wheat,which provides a theoret

关 键 词：改性生物炭 磷肥 酸性红壤 磷有效性 小麦产量 

分 类 号：S512.1[农业科学—作物学]