农学学报2026，Vol.16Issue(1)：24-32,9.
基于主成分分析的引黄灌区水浇地合理耕层评价指标体系构建
Construction of Evaluation Index System for Reasonable Plough Layer of Irrigated Land in Yellow River Irrigation District Based on Principal Component Analysis
摘要
Abstract
s:Reasonable plough layer has an important impact on the high and stable yield of crops,and its evaluation system is the theoretical basis for constructing reasonable plough layer,but the evaluation system of plough layer suitable for irrigated land in Yellow River Irrigation District has not been established yet.Correlation analysis and principal component analysis were used to analyze 180 soil samples of the plough layer of maize fields in the Gansu Yellow River Irrigation District,to screen the evaluation indexes of plough layers suitable for irrigated field,and to establish an evaluation system.The results showed that the minimum data set(MDS)affecting the quality of plough soil was determined,including:plough layer depth,thickness of plough pan,>0.25 mm water-stable aggregates,available nitrogen,available phosphorus and available potassium.The correlation between the full data set of plough soil quality index(SQI-TDS)and the minimum data set of plough soil quality index(SQI-MDS)confirmed the rationality of the evaluation indexes of the minimum data set;based on the response relationship between corn yields and key indexes,the lower and upper reference values of key indexes were obtained.The index system and the range of values for evaluating the reasonable plough layer of irrigated field in the Yellow River Irrigation Area are:plough layer depth(22.2-22.7cm),thickness of plough pan(6-8.6 cm),>0.25 mm water-stable agglomerates(13.9%-16.3%),available nitrogen(70.41-99.81 mg/kg),available phosphorus(17.34-30.84 mg/kg),available potassium(169.9-172.6 mg/kg).This system could be used as a reference basis for local farmers to rationally cultivate and fertilize,establish suitable plough layer and construct high-standard farmland.关键词
甘肃引黄灌区/水浇地合理耕层/主成分分析/最小数据集/土壤质量指数Key words
Gansu Yellow River Irrigation District/reasonable plough layer of irrigated field/principal component analysis/minimum data set/soil quality index分类
农业科技引用本文复制引用
陈岚,王成宝,杨思存,罗珠珠,霍琳,温美娟..基于主成分分析的引黄灌区水浇地合理耕层评价指标体系构建[J].农学学报,2026,16(1):24-32,9.基金项目
甘肃省重点研发计划项目"引黄灌区农田碳汇能力提升与耕层定向培育模式构建与应用"(22YF7NA038) （22YF7NA038）
农业部公益性行业(农业)科研专项"引黄灌区灰钙土合理耕层构建与试验示范"(201503117) （农业）
甘肃省青年科技基金计划"引黄灌区秸秆还田和施肥对盐碱地土壤氮素组分和微生物的影响机制研究"(21JR7RA724). （21JR7RA724）
