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赵明松,李德成,张甘霖,王世航.1980—2010年安徽省耕地表层土壤养分变化特征[J].土壤,2018,50(1):173-180. ZHAO Mingsong,LI Decheng,ZHANG Ganlin,WANG Shihang.Changes of Soil Nutrient Contents of Cultivated Lands in Anhui Province from 1980 to 2010[J].Soils,2018,50(1):173-180 本文二维码信息
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1980—2010年安徽省耕地表层土壤养分变化特征
Changes of Soil Nutrient Contents of Cultivated Lands in Anhui Province from 1980 to 2010
投稿时间:2017-02-06  修订日期:2017-03-14
DOI:10.13758/j.cnki.tr.2018.01.023
中文关键词:  土壤养分  变化特征  耕地  安徽省
Key Words:Soil nutrient  Characteristic of change  Cultivated land  Anhui Province
基金项目:国家自然科学基金项目(41501226)、安徽省高校自然科学研究项目(KJ2015A034)、国家科技基础性工作专项(2008FY110600)、土壤与农业可持续发展国家重点实验室开放基金(Y412201431)和安徽理工大学人才引进项目(ZY020)资助。
作者单位E-mail
赵明松 安徽理工大学测绘学院 zhaomingsonggis@163.com 
李德成 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所) dcli@issas.ac.cn 
张甘霖 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)  
王世航 安徽理工大学测绘学院  
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中文摘要:
      本研究利用安徽省第二次土壤普查数据和2010—2011年土壤调查数据,运用统计方法从省级和县级两个尺度研究1980—2010年安徽省耕地表层(0 ~ 20 cm)土壤有机质(SOM)、全氮(TN)、全磷(TP)和全钾(TK)等养分含量的变化特征。结果表明:1980—2010年全省耕地土壤养分变化趋势不同,SOM平均含量由20.65 g/kg增加到23.30 g/kg,TP平均含量由0.58 g/kg增加到0.71 g/kg,TN含量总体保持不变,TK平均含量由19.00 g/kg减少到14.28 g/kg,4种养分含量的变异程度均降低。从养分含量的等级分布来看,全省耕地肥力总体上提高,SOM、TP和TN的高值比例均有不同程度的增加,TP含量的等级提升较大。在空间上,淮北平原和沿江平原的SOM和TN含量增加较多,淮北平原和皖南丘陵区TP含量增加较多,各地理区域TK含量减少程度相似。3个典型县土壤养分变化趋势与全省变化趋势一致,除TK含量减少外其余养分含量均有不同程度的增加。典型县耕地土壤养分变化与相应的地理区域养分变化趋势基本一致。
Abstract:
      Anhui Province located in East China was selected and comparative study was done based on the data of soil nutrient contents obtained in the Second National Soil Survey and in 2010 and 2011 in order to explore change characteristics of soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP) and total potassium (TK) in the surface layer (0—20 cm) of cultivated land in the province and county scales during the period (1980—2010). Results showed that soil nutrients presented different change trends in the whole province from 1980 to 2010. The mean SOM and TP contents increased from 20.65 g/kg to 23.30 g/kg and from 0.58 g/kg to 0.71 g/kg, respectively, TN contents remained almost unchanged, while TK content decreased from 19.00 g/kg to 14.28 g/kg. Variation coefficient of all soil nutrients decreased with different degrees from 1980 to 2010. The distribution of nutrient content levels indicated an overall improvement of cultivated land fertility in the whole province, the proportion of high contents in SOM, TP and TN increased with different degrees. Spatially, the changes of soil nutrients varied in different land use types and geographic areas with different degrees, SOM and TN contents increased considerably in Huaibei plain and Yangtze plain, TP contents increased considerably in Huaibei plain and Southern hilly mountains, TK contents presented the similar change trend in all geographic areas. The change trends of soil nutrients in three typical counties were consistent with the change trend in the province scale, but soil nutrient contents increased with different degrees except TK in typical counties.
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