摘要
对宁夏引黄灌区春小麦不同生育期土壤中有机质、碱解氮、有效磷、速效钾、有效铁、有效锰、有效铜、有效锌、有效硫、pH值、全盐含量进行分析,比较土壤养分含量在不同生育期的变化并进行权重分析。结果表明:有机质平均含量为15.0 g/kg,95%置信区间为14.5~15.4 g/kg,变异系数为11.2%;试验区土壤有效锌平均含量不足,平均含量0.82 mg/kg,95%置信区间为0.78~0.85 mg/kg;有效锰处于缺乏状态,含量仅为9.3 mg/kg,接近土壤基础含量;全盐含量95%置信区间为0.72~0.84 g/kg,属非盐渍化土壤。试验区有效硫、有效磷、有效铁元素含量区域差异较大,变异系数均在40%以上。以熵值法进行权重分析,结果表明:各评价指标对小麦生育期间土壤养分的影响权重大小在6.2%~15.5%之间,不同生育期同一元素的影响力不同,同一生育期影响较大的元素不止一个,各元素的影响都不容忽视。
The soil organic matter,available nitrogen,available phosphorus,available potassium,available iron,available manganese,available copper,available zinc and available sulfur in tillering stage,jointing stage,filling stage,heading stage and harvest stage of spring wheat planted in irrigating region of Ningxia were studied.The change of soil nutrient content in different growth periods was compared and weight analysis was carried out.The results showed that the average content of organic matter was 15.0 g/kg,and the 95%confidence interval was 14.5~15.4 g/kg,and the coefficient of variation was 11.2%.The average content of available Zn was 0.82 mg/kg,and the 95%confidence interval was 0.78~0.85 mg/kg,which was the only nutrient in the low level among all the tested nutrients.The available Mn content was only 9.3 mg/kg,which was close to the basic soil content.The 95%confidence interval of total salt content was 0.72~0.84 g/kg,belonging to non-salinization soil.The content of effective S,P and Fe in the experimental area varied greatly,and the coefficient of variation were more than 40%.Analysis of the importance of soil nutrient elements by entropy method.The results showed that the influence weight of each evaluation index on soil nutrients during wheat growth is between 6.2%and 15.5%.The influence of elements in different growth periods is different.There is more than one element in the same growth period,and the influence of each element plays a key role in production.
作者
杨春霞
开建荣
王彩艳
王芳
闫玥
李淑玲
李彩虹
张艳
夏学智
Yang Chunxia;Kai Jianrong;Wang Caiyan;Wang Fang;Yan Yue;Li Shuling;Li Caihong;Zhang Yan;Xia Xuezhi(Ningxia Institute of Quality Standard and Testing Technology for Agro-Products,Yinchuan,Ningxia 750002;Ningxia Service Center for Introducing Agricultural Reclamation and Forestry and Animal Husbandry,Yinchuan,Ningxia 750021)
出处
《宁夏农林科技》
2021年第10期14-19,30,共7页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
宁夏农林科学院先导资金项目(基础研究)(NKYG-19-09)资助。
关键词
春小麦生育期
土壤养分
权重分析
Growth stage of spring wheat
Soil nutrient
Weight analysis
