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Does biochar addition influence the change points of soil phosphorus leaching?
  • ISSN号:2095-3119
  • 期刊名称:Journal of Integrative Agriculture
  • 时间:0
  • 页码:-
  • 分类:S153.61[农业科学—土壤学;农业科学—农业基础科学] X791[环境科学与工程—环境工程]
  • 作者机构:[1]College of Resource and Environmental Sciences, China Agricultural University, Beijing 100193, R.R.China
  • 相关基金:This research was supported by the National Natural Science Foundation of China (41071206) and the Key Technologies R&D Program of China during the 1 lth Five-Year Plan period (2008BADA7B05).
  • 相关项目:生物质焦改良北京城区土壤的效果及机理
作者: 林启美|
中文摘要:

Phosphorus change point indicating the threshold related to P leaching, largely depends on soil properties. Increasing data have shown that biochar addition can improve soil retention capacity of ions. However, we have known little about weather biochar amendment influence the change point of P leaching. In this study, two soils added with 0, 5, 10, 20, and 50 g biochar kg-1 were incubated at 25°C for 14 d following adjusting the soil moisture to 50% water-holding capacity(WHC). The soils with different available P values were then obtained by adding a series of KH 2 PO 4 solution(ranging from 0 to 600 mg P kg-1 soil), and subjecting to three cycles of drying and rewetting. The results showed that biochar addition significantly lifted the P change points in the tested soils, together with changes in soil pH, organic C, Olen-P and CaCl 2-P but little on exchangeable Ca and Mg, oxalate-extractable Fe and Al. The Olsen-P at the change points ranged from 48.65 to 185.07 mg kg-1 in the alluvial soil and 71.25 to 98.65 mg kg-1 in the red soil, corresponding to CaCl 2-P of 0.31-6.49 and 0.18-0.45 mg L-1, respectively. The change points of the alluvial soil were readily changed by adding biochar compared with that of the red soil. The enhancement of change points was likely to be explained as the improvement of phosphate retention ability in the biochar-added soils.

英文摘要:

Phosphorus change point indicating the threshold related to P leaching, largely depends on soil properties. Increasing data have shown that biochar addition can improve soil retention capacity of ions. However, we have known little about weather biochar amendment influence the change point of P leaching. In this study, two soils added with 0, 5, 10, 20, and 50 g biochar kg-1 were incubated at 25℃ for 14 d following adjusting the soil moisture to 50% water-holding capacity (WHC). The soils with different available P values were then obtained by adding a series of KH2PO4 solution (ranging from 0 to 600 mg P kg-1 soil), and subjecting to three cycles of drying and rewetting. The results showed that biochar addition significantly lifted the P change points in the tested soils, together with changes in soil pH, organic C, Olen-P and CaC12-P but little on exchangeable Ca and Mg, oxalate-extractable Fe and Al. The Olsen-P at the change points ranged from 48.65 to 185.07 mg kg-1 in the alluvial soil and 71.25 to 98.65 mg kg^-1 in the red soil, corresponding to CaCl2-P of 0.31-6.49 and 0.18-0.45 mg L~, respectively. The change points of the alluvial soil were readily changed by adding biochar compared with that of the red soil. The enhancement of change points was likely to be explained as the improvement of phosphate retention ability in the biochar-added soils.

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期刊信息
  • 《农业科学学报:英文版》
  • 主管单位:中国农业科学院
  • 主办单位:中国农业科学院
  • 主编:
  • 地址:北京中关村南大街12号
  • 邮编:100081
  • 邮箱:zgnykx@caas.cn
  • 电话:010-82106280 82106281
  • 国际标准刊号:ISSN:2095-3119
  • 国内统一刊号:ISSN:10-1039/S
  • 邮发代号:2-851
  • 获奖情况:
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘(网络版),英国农业与生物科学研究中心文摘,荷兰文摘与引文数据库,美国科学引文索引(扩展库),美国生物科学数据库,英国动物学记录,英国食品科技文摘
  • 被引量:69