不同种植年龄紫花苜蓿对沙地土壤营养元素含量的影响  

Effect of Different Planting Ages of Alfalfa on the Nutrient Element Content of Sandy Soil

作　　者：李娜 LI Na(Shanxi College of Applied Science and Technology,Taiyuan 030000,China)

机构地区：[1]山西应用科技学院,山西太原030000

出　　处：《农机使用与维修》2025年第3期125-127,131,共4页Agricultural Machinery Using & Maintenance

摘　　要：为实现对沙地土壤的改良利用及可持续发展,以种植紫花苜蓿为例,分析不同种植年龄(1,2,3,5,7,9和10年)紫花苜蓿对沙地土壤营养元素含量的影响,其中土壤总氮和有机碳含量在1~7年变化相差较小,9~10年明显增加;土壤碱解氮含量在种植第9年达到最大,在第7年最小;土壤速效磷和速效钾含量在种植1~2年内上升明显,第3年之后下降,尤其是速效磷下降最明显,但在9~10年速效钾含量又有所回升。表明种植紫花苜蓿能够提高土壤的营养成分含量,从而有效改良沙地土壤。To achieve the improvement and sustainable development of sandy soil,taking the planting of alfalfa as an example,the effects of different planting ages(1,2,3,5,7,9,and 10 years)of alfalfa on the nutrient element content of sandy soil were analyzed.The total nitrogen and organic carbon content of the soil showed little difference in 1~7 years,but increased significantly in 9~10 years;The alkaline nitrogen content in the soil reaches its maximum in the 9th year of planting and its minimum in the 7th year;The content of available phosphorus and potassium in the soil increases significantly within 1~2 years of planting,and decreases after the third year,with the most significant decrease in available phosphorus.However,the content of available potassium increases again in 9~10 years.Indicating that planting alfalfa can increase the nutrient content of soil,thereby effectively improving sandy soil.

关 键 词：紫花苜蓿 营养元素 土壤有机碳 土壤速效钾 

分 类 号：S158.3[农业科学—土壤学]