[1]杨育文,陈秋会,席运官,等.有机与常规种植模式下菜地氮、磷的淋溶特征[J].江苏农业学报,2021,(04):902-909.[doi:doi:10.3969/j.issn.1000-4440.2021.04.012]
　YANG Yu-wen,CHEN Qiu-hui,XI Yun-guan,et al.Leaching characteristics of nitrogen and phosphorus in vegetable fields under organic and conventional farming systems[J].,2021,(04):902-909.[doi:doi:10.3969/j.issn.1000-4440.2021.04.012]
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有机与常规种植模式下菜地氮、磷的淋溶特征()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2021年04期
页码:
902-909
栏目:
耕作栽培·资源环境
出版日期:
2021-08-28

文章信息/Info

Title:
Leaching characteristics of nitrogen and phosphorus in vegetable fields under organic and conventional farming systems
作者:
杨育文1; 陈秋会1; 席运官1; 刘明庆1; 王磊1; 高丽1; 杨涛明2; 李丽娜2; 和丽萍2
（1.生态环境部南京环境科学研究所，江苏南京210042；2.云南省生态环境科学研究院，云南昆明650034）
Author(s):
YANG Yu-wen1; CHEN Qiu-hui1; XI Yun-guan1; LIU Ming-qing1; WANG Lei1; GAO Li1; YANG Tao-ming2; LI Li-na2; HE Li-ping2
(1.Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People’s Republic of China, Nanjing 210042, China;2.Yunnan Provincial Research Academy of Eco-environmental Sciences， Kunming 650034, China)
关键词:
菜地; 有机种植; 淋溶; 氮; 磷; 化学需氧量(COD)
Keywords:
vegetable field; organic cultivation; leaching; nitrogen; phosphorus; chemical oxygen demand(COD)
分类号:
S157.4；X820.3
DOI:
doi:10.3969/j.issn.1000-4440.2021.04.012
文献标志码:
A
摘要:
为了探究有机、常规2种种植模式下菜地土壤养分的淋溶特征，采用渗漏计装置收集地下1 m深的淋溶水，通过2018年、2019年连续2年的田间试验，比较等氮投入条件下有机、常规种植菜地中淋溶水氮和磷质量浓度、淋溶量及化学需氧量（COD）。结果表明，在有机种植模式下，2018年、2019年的总氮淋溶量分别比常规种植模式降低了42.88%、48.00%；在有机种植模式下，2018年、2019年的总磷淋溶量分别比常规种植模式降低了28.09%、16.25%，但在有机种植模式下，土壤淋溶水COD比常规模式提高了118.01%。菜地土壤中的养分淋失以氮为主，氮素在施肥初期，尤其是强降雨发生时最易发生淋失，硝态氮是氮素淋溶损失的主要形态。综上，与常规种植模式相比，有机种植能有效减少菜地土壤中的氮淋溶，在一定程度上减少磷淋溶，但会显著增加淋溶水COD的风险。
Abstract:
To explore the leaching characteristics of soil nutrients in vegetable fields under organic and conventional farming systems, the leaching water from 1 m underground was collected using lysimeter, and mass concentration of nitrogen (N) and phosphorus (P), chemical oxygen demand (COD) and leaching amount of leaching water in organic and conventional vegetable fields under the condition of equal N input were compared through continuous two-year field experiment in 2018-2019. The results showed that the total N leaching amount in 2018 and 2019 under organic planting pattern was 42.88% and 48.00% lower than that under conventional planting pattern respectively. The total P leaching amount in 2018 and 2019 under organic planting pattern was 28.09% and 16.25% lower than that under conventional planting pattern respectively. However, the COD in soil leachate under organic planting pattern increased by 118.01% compared with that under the conventional planting system. N was the main nutrient leached in vegetable soil. Most of the N leaching loss occurred in the initial period of fertilization, especially during intensive rainfall, and nitrate nitrogen was the main form of N leaching loss. In summary, compared with the conventional planting system, the N loss of vegetable soil via leaching can be reduced effectively under organic planting pattern, and P leaching can be reduced partly, but the risk of COD in leaching water can be increased significantly.

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备注/Memo

备注/Memo:
收稿日期：2020-11-10基金项目：云南省生态环境厅土壤修复项目[YNZDZB(2017)002]；中央级公益性科研院所基本科研业务专项（GYZX200104、GYZX210514）作者简介：杨育文（1991-），女，甘肃武威人，硕士，助理研究员，主要研究方向为有机农业与农村面源污染防治。（E-mail）yywofrcc@126.com通讯作者：席运官，（E-mail）xyg@nies.org
更新日期/Last Update: 2021-09-06