桐城市耕地主要养分变化分析

Analysis of Main Nutrient Changes of Cultivated Land in Tongcheng City

为掌握桐城市耕地主要养分状况,提升耕地潜在生产力,促进农业绿色可持续发展,本文对桐城市2008年与2018年两期耕地采样点pH值和主要养分数据进行了整合分析。结果表明:2018年桐城市耕地土壤pH值平均为5.30,属于酸性土壤;耕地土壤有机质平均值为25.10 g/kg,属于中等水平;耕地土壤有效磷平均值为10.80 mg/kg,属于中等水平;耕地土壤速效钾平均值为94.90 mg/kg,属于中等水平。2008-2018年间,桐城市耕地土壤pH值、有机质、有效磷和速效钾含量均发生较大变化,其中有机质含量呈下降趋势(平均降低6.20 g/kg),土壤pH值少量提升(较2008年提高了0.20),有效磷和速效钾呈上升趋势(平均值分别提高了2.60、15.00 mg/kg),需要加强耕地土壤培肥,加大养分投入力度。

In order to master the main nutrient status of cultivated land in Tongcheng City,improve the potential productivity of cultivated land,and promote the green and sustainable development of agriculture,this paper integrated and analyzed the pH value and main nutrient data of cultivated land sampling points in 2008 and 2018 in Tongcheng City.The results showed that the average pH value of cultivated soil in Tongcheng City in 2018 was 5.30,belonging to acidic soil;the average organic matter of cultivated soil was 25.10 g/kg,belonging to the medium level;the average available phosphorus of cultivated soil was 10.80 mg/kg,belonging to the medium level;the average rapid available potassium of cultivated soil was 94.90 mg/kg,belonging to the medium level.From 2008 to 2018,the pH value,organic matter,available phosphorus and rapid available potassium contents of cultivated soil in Tongcheng City changed greatly.The organic matter content showed a downward trend,with an average decrease of 6.20 g/kg.The soil pH value increased slightly,with an increase of 0.20 compared with that in 2008.The available phosphorus and rapid available potassium showed an upward trend,with an average increase of 2.60 mg/kg and 15.00 mg/kg respectively.It is necessary to strengthen soil fertility and increase nutrient input.