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为了研究紫色土-黑麦草系统单季消纳沼液的潜力,采用盆栽试验研究沼液灌溉紫色土-黑麦草系统后,对植物品质和土壤环境的安全影响.结果表明,沼液灌溉后,黑麦草的产量和品质明显提高,黑麦草中的重金属含量远低于国家标准限值;沼液灌溉能够提高土壤中的养分含量,高灌溉水平导致了土壤中Cd,As的累积,但单季沼液灌溉不会超过国家土壤环境质量标准.在保证牧草和土壤环境安全的前提下,紫色土-黑麦草系统沼液单季灌溉量应控制在1 584m~3/hm~2以内.
In order to study the potential of biogas slurry in purple soil-rye grass system, pot experiment was conducted to study the safety of biogas slurry irrigation on purple soil-ryegrass system on plant quality and soil environment.The results showed that after biogas slurry irrigation, The yield and quality of ryegrass increased significantly, and the content of heavy metals in ryegrass was much lower than the national standard. The biogas slurry irrigation could increase the soil nutrient content, and the high irrigation level resulted in the accumulation of Cd and As in the soil. Biogas slurry irrigation will not exceed the national soil environmental quality standards.Under the premise of ensuring the safety of pasture and soil environment, purple soil - ryegrass system biogas slurry single season irrigation should be controlled within 1 584m ~ 3 / hm ~ 2.