第一师耕地土壤养分现状及变化趋势分析

Analysis on Current Situation and Change Trend of Soil Nutrients in Cultivated Land in Alar Region

为了解和掌握第一师耕地土壤养分现状及变化趋势,分别对该地区1983、2007、2013、2019和2020年5个时期的耕地土壤养分情况进行分析。结果显示:第一师耕地土壤养分含量现状为,有机质12.12g·kg^(-1)属4级,全氮0.69g·kg^(-1)属5级,水解性氮68.60mg·kg^(-1)属4级,有效磷32.64mg·kg^(-1)属2级,速效钾167mg·kg^(-1)属2级,全盐量4.22g·kg^(-1)属3级,有效铜1.62mg·kg^(-1)属2级,有效锌0.95mg·kg^(-1)属3级,有效铁28.53mg·kg^(-1)属1级,有效锰3.87mg·kg^(-1)属4级,有效硼0.71mg·kg^(-1)属3级。近37年来耕地土壤养分含量变化趋势为:有机质、全氮、有效磷呈上升趋势,其中有效磷增幅较大,达318%;水解性氮呈先上升再下降然后小幅上升的波状趋势;速效钾呈先快速下降再上升的趋势;微量元素中有效铁变化不大,其他元素总体呈下降趋势,其中有效硼降幅较大,达68.3%。根据分析得到的耕地土壤养分情况,针对本地区田管现状提出相应的培肥地力措施。

In order to understand and master the current situation and dynamic change trend of cultivated land soil nutrients in the first division,the change trend of cultivated land soil nutrients in 1983(the second national soil survey),2007,2013,2019 and 2020 was analyzed.The results show that the current situation of soil nutrient content in the cultivated land of the first division:organic matter 12.12g·kg^(-1) belongs to grade 4,total nitrogen 0.69g·kg^(-1) belongs to grade 5,hydrolyzable nitrogen 68.60mg·kg^(-1) belongs to grade 4,available phosphorus 32.64mg·kg^(-1) belongs to grade 2,available potassium 167mg·kg^(-1) belongs to grade 2,total salt 4.22g·kg^(-1),available copper 1.62mg·kg^(-1) belongs to grade 2,available zinc 0.95mg·kg^(-1) belongs to grade 3,and available iron 28.53mg·kg^(-1) belongs to grade 1,Effective manganese 3.87mg·kg^(-1) belongs to grade 4,and effective boron 0.71mg·kg^(-1) belongs to grade 3;The change trend of soil nutrients in cultivated land in recent 37 years:the contents of organic matter,total nitrogen and available phosphorus showed an upward trend,in which the content of available phosphorus increased by 318%;The content of hydrolyzable nitrogen increased first,then decreased,and then increased;The content of available potassium decreased rapidly at first and then increased;The content of available iron in trace elements changed little,and the content of other elements showed a downward trend,in which the content of available boron decreased by 68.3%.According to the present situation of soil nutrients in cultivated land,the corresponding fertility measures were put forward.