QIAO Yunfa,ZHONG Xin,MIAO Shujie,et al.Evaluation Indicators of Soil Quality in Plough Layer of Aeolian Sandy Land in Northeast China Based on Minimum Data Set[J].Research of Soil and Water Conservation,2019,26(04):132-138.
基于最小数据集的东北风沙土农田耕层土壤质量评价指标
- Title:
- Evaluation Indicators of Soil Quality in Plough Layer of Aeolian Sandy Land in Northeast China Based on Minimum Data Set
- 分类号:
- S158.3
- 摘要:
- 2015年10月—2017年10月玉米收获期，在位于东北风沙土区的黑龙江省杜尔伯特蒙古自治县域内，调查采集了53个样点耕层土壤，测定了21项土壤理化性状指标和玉米产量。采用聚类分析法建立了东北风沙土农田耕层质量诊断最小数据集（MDS），利用全量数据集（TDS）、土壤质量指数（SQI-TDS）、玉米产量、最小数据集土壤质量指数（SQI-MDS）对风沙土耕层特征进行了分析评价。SQI-TDS、玉米产量与SQI-MDS呈极显著正相关（r2分别为0.451 5，0.557 9），这表明MDS适合替代TDS对风沙土农田耕层土壤质量进行评价。调查区域东北风沙土平均土壤质量指数为0.46，基于MDS，根据土壤质量评价指数土壤地力划分为5级，野外调查53个点中34.0%样点土壤属于地力Ⅳ级，52.8%样点土壤属于地力Ⅲ级，11.2%样点土壤属于地力Ⅱ级，研究区域没有Ⅰ级和Ⅴ级地力分布。调查区域平均玉米产量7.6 Mg/hm2，根据玉米产量土壤地力划分5级，野外调查53个点中1.9%样点属于地力Ⅴ级，35.8%样点土壤地力属于Ⅳ级，41.5%样点土壤地力属于Ⅲ级，18.9%样点土壤地力属于Ⅱ级，1.9%样点土壤地力属于Ⅰ级。利用最小数据集SQI-MDS能够较准确地定量描述风沙土农田耕层质量，为东北风沙土农田耕层土壤质量诊断、合理耕层评价提供理论依据。
- Abstract:
- In maize harvest periods in Octobers of years from 2015 to 2017, soil samples of plough layer in aeolian sandy land were collected from 53 sites located in Durbert Mongolian Autonomous County, Heilongjiang Province, northeast China. 21 chemical and physical indicators and maize yields were determined. The minimum data set (MDS) was constructed by cluster analysis, and soil quality characteristics of ploug layer were evaluated with total data set (TDS), SQI-TDS, maize yield and SQI-MDS. The results showed that coefficients of determination (r2) between SQI-MDS and SQI-TDS, maize yield were 0.451 5 and 0.557 9, respectively, indicating that MDS could substitute TDS to evaluate the quality of plough layer soil of aeolian sandy land. Soil fertility was divided into five grades based on MDS with mean value of 0.46, 34.0% of 53 sampling site belonged to grade Ⅳ, 52.8% of them was grade Ⅲ, and 11.2% was grade Ⅱ, no sites fell into in gradeⅠ and grade Ⅴ. Based on maize yield with mean value of 7.6 Mg/hm2, soil fertility was also be divided into five grades, the sites belonging to gradeⅠ, gradeⅡ, gradeⅢ, gradeⅣ and gradeⅤ were 1.9%, 18.9%, 41.5%, 35.8% and 1.9% of 53 sampling sites, respectively. All these indicated that SQI-MDS could accurately describe the quality of plough layer in aeolian sandy land, and provide a theoretical basis for soil quality diagnosis and reasonable tillage evaluation of farmland in northeast China.
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备注/Memo
收稿日期:2018-09-18;改回日期:2018-10-08。
基金项目:农业部公益性行业（农业）科研专项（201503116-03）；南京信息工程大学引进人才项目（2015r50）
作者简介:乔云发(1975-),男,黑龙江讷河人,博士,研究员,博士生导师,主要从事土壤生态研究。E-mail:qiaoyunfa@163.com
通讯作者:苗淑杰(1975-),女,黑龙江讷河人,博士,教授,主要从事土壤生态研究。E-mail:miaoshujie@126.com