| 赵迪,张理胜,罗元,张克强,王风.养殖肥液灌溉土壤磷淋失阻控：镧改性生物炭[J].农业环境科学学报,2021,40(11):2574-2581. |
| 养殖肥液灌溉土壤磷淋失阻控：镧改性生物炭 |
| Prevention and control of phosphorus leaching in soil irrigated with biogas slurry by lanthanum modified biochar |
| 投稿时间：2021-09-06 |
| DOI：10.11654/jaes.2021-1027 |
| 中文关键词: 镧改性生物炭 阻控 养殖肥液 磷素 淋失 |
| 英文关键词: lanthanum modified biochar inhibiting biogas slurry phosphorus leaching loss |
| 基金项目:国家重点研发计划项目（2017YFD0800403）；中央级公益性科研院所基本科研业务费专项（Y2021XC18）；云南省重大科技专项计划项目（202102AE090011） |
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| 中文摘要: |
| 为探究镧改性生物炭伴施养殖肥液灌溉条件下土壤磷素的淋溶特征和阻控效果，采用土柱模拟试验对比镧改性生物炭和石膏、沸石传统阻控剂对磷淋溶的阻控特征，及镧改性生物炭不同添加量（1%、3%和5%）和不同施用方式（0~20 cm和0~10 cm混合）的影响效果。结果表明：磷淋失阻控效果呈现镧改性生物炭 > 石膏 > 沸石，且镧改性生物炭处理阻控效果最好（P<0.05）；镧改性生物炭施加处理总磷淋失量比对照处理削减了16.3%~58.3%，随镧改性生物炭施加量增加削减效果显著升高，这主要是因为生物炭对磷酸盐和有机磷发生了吸附；镧改性生物炭0~20 cm和0~10 cm施用方式总磷淋失量分别削减23.4%~58.3%和16.3%~45.0%，全土层混合削减效果更显著（P<0.05）；镧改性生物炭对正磷酸盐和有机磷的吸附机制主要是沉淀作用与络合作用。研究表明，在有机无机复合磷素输入条件下，镧改性生物炭的应用能够明显阻控磷淋失。 |
| 英文摘要: |
| To explore the leaching characteristics and control effects of phosphorus in soil under irrigation conditions of lanthanum-modified biochar combined with biogas slurry, the soil column simulation test was used to compare the resistance and control characteristics of lanthanum-modified biochar, gypsum, and zeolite traditional inhibitors on phosphorus leaching, and the effects of the addition amount(1%, 3%, and 5%)and application method(0~20 cm and 0~10 cm mixture)of lanthanum-modified biochar. The results showed that the control effect of phosphorus leaching loss was lanthanum-modified biochar > gypsum > zeolite, and the control effect of lanthanum-modified biochar was the best(P<0.05). Compared with the control treatment, the total phosphorus leaching loss of lanthanum-modified biochar was reduced by 16.3%~58.3%, and the reduction effect was more evident with an increase in the amount of adsorbed phosphate and organophosphorus. The amount of leached total phosphorus was reduced by 23.4%~58.3% and 16.3%~45.0%, respectively, and the effect of mixed reduction of the whole soil layer was more significant(P<0.05). The adsorption mechanism of lanthanum-modified biochar for orthophosphate and organophosphorus was primarily precipitation and complexation. Results indicate that under the organic-inorganic composite phosphorus input, the application of lanthanum-modified biochar can prevent and control phosphorus leaching loss. |
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