添加生物炭和聚丙烯酰胺对红壤持水特性和宽叶雀稗抗旱特性的影响

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关键词：红壤；干旱胁迫；土壤改良剂；生物炭；聚丙烯酰胺；持水特性；生理特性；宽叶雀稗（PaspalumwettsteiniiHackel）;抗早特性

中图分类号：S156.6；S688.4 文献标识码：A

文章编号：0439-8114（2026）02-0036-06

DOI：10.14088/j.cnki.issn0439-8114.2026.02.006

Effects of biochar and polyacrylamide addition on the water retention characteristics of red soiland thedroughtresistancecharacteristicsofPaspalumwettsteinii

YAOWei-fang，DAIHao-sheng，HUA Xue-ying，XUPeng，YUJing （ElectricPowerResearch Instituteof StateGridAnhuiElectricPowerCo.，Ltd.，Hefei23O6O1，China）

Abstract：Inordertoconstructasetoftechnicalsystemthatcouldefectivelyimprovethestructureofredsoilandimprovetheeffi ciency of vegetation restoration，the effects of biochar（ 2.0% ）and polyacrylamide （PAM， 0.5% ）addition onsoil structure，physiologyandgrowthofaspalumwetsteiniiwerestudiedinredsoilofsouthernChina.Theresultsshowedthat，comparedwiththecontrol without soil conditioner（CK），the saturated hydraulic conductivity of soil treated with PAM increased by 18.4% ，while that of the mixed treatment of PAM and biochar decreased by 42.4% .Single application of PAM or biochar could not increase the capillary water retentioncapacityandfieldwaterretentioncapacityofredsoil.ThemixedaplcationofPAMandbiocharsignificantlyincreasedthe capilaryateretentioncapacityfeldwateetentioncapacityadcapillryprosityofedoil.Underdroughtonditions，opared withCK，themixedapplicationofPAMandbiocharsignificantlyreducedthemalondialdehydecontentintheleavesofaspalumuetsteini，ndsignificatlyicreasedthewaterconentintelavsandtheplantheightofPspaumwesii.Isummary，edition of 2.0% biochar and 0.5% PAM showed the best effct in improving the structure of red soil and promoting the growth of Paspalum wettsteinii.

Keywords：redsoil;droughtstress；soilonditionr;bchar；polyacylamide；waterretentionchracterstics；phyilogicalharac teristics;Paspalum wettsteinii Hackel;drought resistance characteristics

南方红壤丘陵区生态系统脆弱、地形破碎，加之降雨时空分布不均及人类活动破坏，导致水土流失严重、局部侵蚀频现，侵蚀程度仅次于黄土高原，已成为中国水土流失严峻区域[1，2]。（剩余8801字）