外源性碳磷输入对宁夏灌淤土磷素变化的影响  

Effects of exogenous carbon and phosphorus input on soil phosphorus change in irrigated silted soils in Ningxia

作　　者：冒辛平[1] 赵营[1] 刘汝亮[1] 魏永东 MAO Xin-ping;ZHAO Ying;LIU Ru-liang;WEI Yong-dong(Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry Sciences,Yinchuan Ningxia 750002;Traditional Chinese Medicine Station of Yanchi County Science and Technology Bareau of Ningxia Hui Autonomous Region,Yanchi Ningxia 751500)

机构地区：[1]宁夏农林科学院农业资源与环境研究所,宁夏银川750002 [2]宁夏回族自治区盐池县科学技术局中药材站,宁夏盐池751500

出　　处：《中国土壤与肥料》2021年第3期70-74,共5页Soil and Fertilizer Sciences in China

基　　金：宁夏自然科学基金项目“干湿交替下外源碳磷输入对灌淤土磷素组分形态的影响研究”(2018AAC03192);第五批“宁夏青年科技人才托举工程”;宁夏重点研发计划项目“优势粮食绿色丰产增效关键技术研究与示范”(2018BBF02018)。

摘　　要：以宁夏引黄灌区水旱轮作种植模式为背景,以灌淤土为研究基础,采用室内培养法研究水旱轮作淹水培养90 d后灌淤土磷素的演变特征。结果表明,与对照相比外源性鸡粪、秸秆生物炭和磷肥添加均显著提高了灌淤土全磷、有效磷含量,增幅在6.4%~165.2%之间,输入外源性鸡粪与对照相比土壤Ca-P提升了88.4%,且随施磷水平增加无机磷(Pi)占土壤总磷比例提高。输入外源性秸秆生物炭显著增加土壤O-P含量,与施磷量的高低差异不显著,添加外源性鸡粪土壤全磷、有效磷含量较秸秆生物炭提升45.9%和45.4%。施用外源性鸡粪和秸秆生物炭前者较后者无机磷总量增加176.1 mg/kg,增幅34.5%,但无机磷占全磷相对比例后者较前者平均提高了8.5%,这可能与外源性鸡粪和秸秆生物炭对土壤全磷增量大小不同有关。Based on the model of water-and-drought rotation cultivation in Ningxia irrigated area,the indoor culture method was used in this experiment to study the evolution characteristics of phosphorus in the irrigation-silted soil after 90 days of submerged cultivation in water-and-drought rotation cultivation.The results showed that,compared with the control,the addition of exogenous chicken manure,straw biochar and their mixture with phosphate fertilizer significantly increased the contents of soil total phosphorus and available phosphorus by 6.4%~165.2%in the irrigation-silted soil,the input of exogenous chicken manure significantly increased the content of soil Ca-P by 88.4%,and the proportion of inorganic phosphorus(Pi)in soil total phosphorus increased with the application of phosphorus level.The input of exogenous straw biochar significantly increased the soil O-P content,but the difference between it and the application of phosphorus was not significant.The total phosphorus and available phosphorus contents in the soil added with exogenous chicken manure increased by 45.9%and 45.4%compared with that of straw biochar.The application of exogenous chicken manure increased the total amount of inorganic phosphorus by 176.1 mg/kg than that of straw biochar,with an increase of 34.5%,but the relative proportion of inorganic phosphorus in total phosphorus increased by 8.5%on average for the latter compared to the former,which may be related to the increase of total phosphorus in soil by exogenous chicken manure and straw biochar.

关 键 词：外源性碳磷 宁夏 灌淤土 磷素 

分 类 号：S143.2[农业科学—肥料学]