摘要 选择亿鼎土壤调理剂、硅钙钾镁肥、木本泥炭3 种土壤调理剂,采用酸性土壤进行盆栽试验,探究光照培养箱内不同土壤调理剂施用量(1.3 g · kg-1 和13 g · kg-1)对土壤砷的钝化效果及芝麻菜砷吸收的影响。结果表明:施用13 g · kg-1 亿鼎土壤调理剂、硅钙钾镁肥可显著提高土壤pH,而施用13 g · kg-1 木本泥炭显著提高了土壤有机碳含量。施加1.3 g · kg-1 木本泥炭时,土壤中有效态砷含量显著降低了5.17%。与不添加任何土壤调理剂的对照相比,3 种土壤调理剂均能促进芝麻菜生长,施用1.3 g · kg-1 亿鼎土壤调理剂时芝麻菜地上部鲜质量最大,相比对照显著增加了51.3%,且施用土壤调理剂均能显著降低芝麻菜地上部的砷含量。
Abstract:Excessive manure application in vegetable protected fields may cause arsenic(As)accumulation in soil.Optimum soil conditioner application can inhibit As uptake by plant and achieve safe vegetable production.This study selected 3 kinds soil conditioner,including Yiding soil conditioner(YC),compound fertilizer of calcium silicon magnesium potassium(CSMP),woody peat(WP);conducted a pot experiment by acid soil to investigate the influences of different applying rates(1.3 g · kg-1 and 13 g · kg-1)on soil As stabilization effect and As uptake by Eruca sativa Mill. var. sativa.Results showed that the application of 13 g · kg-1 YC and CSMP could significantly increase soil pH,while the application of 13 g·kg-1 WP could significantly increase the soil organic carbon content.The application of 1.3 g · kg-1 WP could significantly decrease the As content by 5.17% in soil.Compared with the control treatment without adding any soil conditioner,these 3 soil conditioners could promote the growth of Eruca sativa Mill. var. sativa.YC application at the rate of 1.3 g · kg-1 could obtain the highest shoot fresh weight of Eruca sativa Mill. var.sativa,which was significantly increased by 51.3%.Additionally,the application of all soil conditioners could remarkably decrease the As contents in shoot of Eruca sativa Mill. var. sativa.