紫花苜蓿种植对农田土壤理化性质的影响  

Effects of Alfalfa Cultivation on Physiochemical Properties of Farmland Soil

作　　者：杜岩功[1] 张香运 王云英 樊博 DU Yangong;ZHANG Xiangyun;WANG Yunying;FAN Bo(Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810001,China;Beijing Zhongnong′ande Sports Lawn Technology Co.,Ltd.,Beijing 100049,China)

机构地区：[1]中国科学院西北高原生物研究所,青海西宁810001 [2]北京中农安得运动草坪科技有限公司,北京100049

出　　处：《畜牧与饲料科学》2023年第2期98-102,共5页Animal Husbandry and Feed Science

基　　金：青海省重点研发与转化计划项目“青海省高原紫花苜蓿品种适应性评价及示范”(2022-NK-135)。

摘　　要：[目的]研究紫花苜蓿种植对农田土壤理化性质的影响及主要调控因素。[方法]基于中国知网(CNKI)数据库,筛选36篇已发表的相关论文。以清耕为对照,采用Meta方法,分析紫花苜蓿种植对农田土壤理化性质的影响。利用结构方程模型,分析气象因子和土壤理化性质对土壤有机碳、速效氮、速效钾、全氮含量以及土壤含水率和容重的影响强度。[结果]种植紫花苜蓿极显著(P<0.001)增加了农田土壤有机碳、速效氮、全氮、速效钾含量和含水率,增加幅度分别为43.62%、38.54%、31.00%、21.77%、21.05%;显著(P<0.05)增加了土壤速效磷含量,平均效应值和增加幅度分别为0.345±0.137和41.20%;极显著(P<0.001)降低了土壤容重。种植紫花苜蓿增加了土壤全磷、全钾含量和pH值,但均未达到显著性检验水平(P>0.05),增加幅度分别为16.42%、1.42%和1.11%。年均气温和降雨量对紫花苜蓿种植地土壤有机碳含量具有极显著(P<0.001)影响。[结论]未来降水量增加气候情景将显著提高紫花苜蓿种植地土壤有机碳含量,但全球变暖将降低紫花苜蓿种植地土壤有机碳含量。[Objective]This study was conducted to assess the effects of alfalfa cultivation on physiochemical properties of farmland soil and its main driven factors.[Method]A total of 36 published relevant papers indexed in the China National Knowledge Infrastructure(CNKI)database were collected.Using clear tillage as the control,the effects of alfalfa cultivation on physiochemical properties of farmland soil were investigated with the Meta-analysis method.Based on the structural equation model,the impact intensities of meteorological factors and soil physicochemical properties on soil contents of organic carbon,available nitrogen,available potassium,total nitrogen as well as soil moisture content and bulk density were evaluated.[Result]Alfalfa cultivation extremely significantly(P<0.001)increased the farmland soil contents of organic carbon,available nitrogen,total nitrogen,available potassium,and the moisture content by 43.62%,38.54%,31.00%,21.77%,and 21.05%,respectively;significantly(P<0.05)increased the soil available phosphorus content,with an average effect size and an increasing extent of 0.345±0.137 and 41.20%,respectively;extremely significantly(P<0.001)reduced the soil bulk density.With increases of 16.42%,1.42%,and 1.11%,respectively,alfalfa cultivation also increased the soil contents of total phosphorus and total potassium as well as the soil pH value,however none of these changes were significant(P>0.05).The average annual temperature and precipitation had extremely significant(P<0.001)impacts on the soil organic carbon content in alfalfa cultivation land.[Conclusion]The climate scenario of precipitation increase in the future would significantly increase the soil organic carbon content in alfalfa cultivation land,but global warming would reduce the soil organic carbon content in alfalfa cultivation land.

关 键 词：紫花苜蓿 土壤有机碳 平均效应值 结构方程模型 

分 类 号：S541.1[农业科学—作物学] S153.6