灌溉排水学报2023，Vol.42Issue(12)：7-14,8.DOI:10.13522/j.cnki.ggps.2023034
河套灌区耕地土壤性质与作物产量空间分布特征之间的关系
Relationship between Crop Yield and Soil Properties and Its Application for Optimizing Irrigation and Fertilization in Hetao Irrigation District
摘要
Abstract
[Objective]Crop yield is inherently influenced by soil properties.This paper analyzes the spatialdistribution of soil properties in Hetao Irrigation District(HID)and its relationship with crop yields,from which we propose how to optimize irrigation and fertilization to improve soil quality and crop yield in the district.[Method]The analysis was based on experimental data.The spatial distribution of soil physicochemical properties and crop yields in the district were analyzed using the classical statistics and geostatistics.Their correlations were used to help improve irrigation and fertilization.[Result]①We found prominent issues such as high salinization,increased soil bulk density,and reduced crop yields,in the district.Notably,organic matter and nitrogen levels are relatively low,while available phosphorus is adequate and available potassium is abundant.Soil salinity showed considerable spatial variability,whereas organic matter,total nitrogen,available phosphorus,potassium,and crop yield coefficients showed moderate spatial fluctuations.Bulk density and soil pH,on the other hand,demonstrated only minor spatial variation.Bulk density and soil pH showed weak spatial variation.②Spatially,soil salinity was pronounced in the central region,decreasing towards the periphery.Crop yield coefficients declined from the Southwest to the Northeast.Organic matter content increased from the West to the East.Soil bulk density,pH,total nitrogen and available phosphorus were the highest in the central region and the least in the East and the West.Low available potassium content was in the Southeast comer,with other areas featuring medium to high levels.③Soil salinity was the main constraint to crop yields.④Nitrogen and organic fertilization should be increased to improve soil fertility and crop yields.Specially,we recommend applying 225 kg/hm2 of urea and 3 393.7 kg/hm2 of organic fertilizer for heavily salinized and saline regions,295.4 kg/hm2 of urea and 3 332.8 kg/hm2 of organic fertilizer for moderately salinized regions,and 365.1 kg/hm2 of urea and 1 280.9 kg/hm2 of organic fertilizer for slightly salinized and non-saline regions.In addition,drainage systems in the Northwest,South,and Southeast of the district should be improved to facilitate salt leaching.[Conclusion]Thefindings outlined in this paper establish a fundamental reference for enhancing soil salinity control and drainage management,as well as optimizing fertilization and irrigation to maintain and bolster crop yields in the Hetao Irrigation District.关键词
河套灌区/土壤性质/作物产量/空间分布/土壤盐渍化/水肥管理Key words
Hetao Irrigation District/soil properties/crop yield/spatial distribution/soil salinization/water and fertilizer management分类
建筑与水利引用本文复制引用
宋阿维,刘雨星,王相平,谢文萍,张琛平,江晓东,姚荣江..河套灌区耕地土壤性质与作物产量空间分布特征之间的关系[J].灌溉排水学报,2023,42(12):7-14,8.基金项目
国家重点研发计划课题(2021YFC3201201,2021YFD1900602) （2021YFC3201201,2021YFD1900602）
内蒙古自治区"科技兴蒙"行动重点专项(NMKJXM202009,NMKJXM202107) （NMKJXM202009,NMKJXM202107）
中央引导地方科技发展资金项目(2021ZY0031) （2021ZY0031）
