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以油菜为试材,采用不同比例蚯蚓肥和竹炭有机肥混合处理,研究了不同时期(定植前、定植后30d及收获前)不同施肥处理对油菜硝酸盐和亚硝酸盐含量的影响。结果表明:单独施用蚯蚓肥可提高油菜各时期叶片硝酸盐和亚硝酸盐含量,每667m~2施2 000kg蚯蚓肥和6.25kg竹炭有机肥能够显著降低有机油菜叶片内硝酸盐和亚硝酸盐的含量,降低幅度达到40%以上,远远低于国家标准。
Using rapeseed as test material, the different proportions of earthworm fertilizer and bamboo charcoal organic fertilizer were mixed to study the effects of different fertilization treatments on the contents of nitrate and nitrite in rape at different periods (before planting, 30 days after planting and before harvest). The results showed that the application of earthworm fertilizer alone could improve the leaf nitrate and nitrite content in rapeseed. The application of 2 000kg earthworm fertilizer and 6.25kg bamboo charcoal organic fertilizer per 667m ~ 2 could significantly reduce nitrate and nitrite in organic rape leaves Content, reduce the rate of more than 40%, far below the national standard.