| 唐明灯,李盟军,王艳红,艾绍英,余丹妮.猪场废弃物对Cd超标土壤生菜生长及Cd含量的影响[J].农业环境科学学报,2016,35(3):558-564. |
| 猪场废弃物对Cd超标土壤生菜生长及Cd含量的影响 |
| Effects of pig farm wastes on growth and Cd concentrations of lettuce grown in a cadmium polluted soil |
| 投稿时间：2015-09-22 |
| DOI：10.11654/jaes.2016.03.020 |
| 中文关键词: 土壤 镉 生菜 猪粪 沼渣 沼液 |
| 英文关键词: soil Cd lettuce pig manure biogas residue biogas slurry |
| 基金项目:广东省科学技术厅项目(2011B020309003);广东省科学技术厅重点项目(2012A030700010);广州市科技计划项目(2014Y2-00521);广东省科学技术厅农业领域重点专项(2012A020100003) |
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| 中文摘要: |
| 为了比较同一猪场废弃物对Cd超标土壤生菜生长及其Cd含量的影响,从广东省博罗县某规模化养猪场同时采集猪粪、沼液与沼渣,通过在Cd超标土壤中添加不同用量猪场废弃物(按每千克土壤0.1、0.2、0.3、0.4、0.5、0.6 g氮用量计算)的盆栽试验(连续2茬生菜),研究生菜生物量与Cd吸收对这3种废弃物的响应关系。结果表明:猪场废弃物种类或用量均显著影响生菜地上部的生物量,其贡献大小为废弃物用量>废弃物种类;第1茬生菜生物量随猪场废弃物用量的增加而降低,第2茬生菜生物量与沼液或沼渣用量之间呈"Λ"形关系,但随猪粪用量增加而显著提高。猪场废弃物种类和用量均显著影响生菜地上部Cd含量,其贡献大小为废弃物种类>废弃物用量。猪粪与沼渣降低生菜Cd含量,沼液提高生菜Cd含量;生菜Cd含量随猪粪用量增加而显著降低,随沼液用量增加而显著提高。生菜Cd含量的变化主要受生物量稀释效应的影响(猪粪处理第1茬例外),每千克该土壤的沼液、猪粪、沼渣用量分别≤370 mL、10 g、15 g时,生菜正常生长。 |
| 英文摘要: |
| A pot experiment with two successive cropping was conducted to investigate the effects of 3 wastes(pig manure, biogas slurry, and biogas residue) from a large-scale pig farm in Boluo county, Guangdong Province, South China, on the growth and cadmium(Cd) concentrations of Lactuca sativa grown in a Cd polluted soil. Based on total nitrogen rates of 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6 g·kg-1 soil, 5, 10, 15, 20, 25, and 30 g of air-dried pig manure, 3, 6, 9, 12, 15, and 18 g of air-dried biogas residue, or 185, 370, 555, 740, 925, and 1110 mL of biogas slurry were respectively applied to 1 kg soil in a plastic pot. All pig manure and air dried biogas residue and 40% of the biogas slurry were used as basal fertilizers, and the rest 60% of the biogas slurry were applied as top dress. Results showed that both type and rate of wastes significantly affected shoot biomass of lettuce, with the rate having greater influence on the biomass than type. The lettuce biomass for the 1st cropping decreased with increasing waste amount. For the 2nd cropping, the shoot biomass showed a "Λ" relationship with the rates of biogas slurry or biogas residue, but a dose-effect relationship with pig manure. Likewise, both type and rate of wastes significantly affected shoot Cd concentrations. However, waste types had greater effects on shoot Cd concentrations than waste rates. Compared with the control, both pig manure and biogas residue significantly decreased plant shoot Cd concentrations in a dose-effect manner, but biogas slurry applications significantly increased shoot Cd concentrations. The changes of shoot Cd concentrations were mainly attributed to the biomass dilution effect. Lettuce grew normally at no more than 370 mL of biogas slurry, 10 g pig manure, or 15 g biogas residue per 1 kg of the tested soil. |
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