施用土壤调理剂对酸性土壤中芝麻菜吸收砷的影响

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。

Effects of Applying Soil Conditioner on Soil Arsenic Uptake by Eruca sativa Mill.var. sativa in Acidic Soil

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．