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中国农学通报 ›› 2019, Vol. 35 ›› Issue (6): 32-36.doi: 10.11924/j.issn.1000-6850.casb17090120

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

不同类型生物炭混施对土壤磷素淋失的影响试验研究

尹俊慧1, 李小英2   

  1. 1.西南林业大学湿地学院;2.西南林业大学生态与水土保持学院
  • 收稿日期:2017-09-23 修回日期:2018-12-29 接受日期:2017-12-22 出版日期:2019-02-22 发布日期:2019-02-22
  • 通讯作者: 李小英
  • 基金资助:
    国家重大研发计划项目“金沙江干热河谷区生态综合治理及生态产业发展技术”(2017YNC505102);西南林业大学科技创新基金项目“不 同类型生物炭混施对土壤磷素淋失的影响”(C16097)。

Different Types of Biochar Mixed Additions Affect Soil Phosphorus Leaching Loss: Experimental Research

  • Received:2017-09-23 Revised:2018-12-29 Accepted:2017-12-22 Online:2019-02-22 Published:2019-02-22

摘要: [目的]研究旨在将竹炭和木炭混施入土壤,比较分析不同生物炭处理对土壤磷素淋失的影响,以期为寻求更高效的生物炭土壤改良技术提供新的思路。[方法]基于土柱淋洗模拟试验,设置CK(不施生物炭和磷肥)、P(单施磷肥)、1:0(施磷肥和木炭)、0:1(施磷肥和竹炭)和1:1(施磷肥和按1:1混合的木炭、竹炭)5组处理,以不同填装容重和淋洗间隔进行两轮实验,测定淋溶液中正磷酸盐含量及pH 值。[结果]两轮实验结果表明:施用生物质炭可显著增加土壤pH值,有效抑制磷素淋失20 %以上。竹炭抑制土壤磷素淋失的效果显著优于木炭,将木炭和竹炭以1:1的比例混施能够提高木炭对磷素淋失的抑制效果。[结论]不同类型生物炭混施技术在控制土壤磷素淋失方面具有良好的应用前景,为寻求更高效的生物炭土壤改良技术,应进一步加强对生物炭的性质、施用量、土壤类型和肥力状况等的综合试验研究。

关键词: 解淀粉芽孢杆菌, 解淀粉芽孢杆菌, 促进生长, 紫花苜蓿, 光叶紫花苕, 白三叶草

Abstract: The impact of different mixed biochar additions on soil phosphorus leaching was comparatively analyzed for a more efficient way of soil improvement. Based on soil pillar leaching experiment, 5 treatments were conducted, including CK (without biochar and phosphate fertilizer), P (phosphate fertilizer), 1:0 (phosphate fertilizer and charcoal), 0:1 (phosphate fertilizer and bamboo biochar) and 1:1 (phosphate fertilizer and the mix of charcoal and bamboo biochar), different packing volumes and leaching intervals were set and the experiment was conducted twice, the concentrations of orthophosphate and pH value in leachate were determined. The results showed that the application of biochar significantly increased soil pH value, and restrained the loss of phosphorus effectively by more than 20%. The inhibitory effect of bamboo biochar was better than that of charcoal, the inhibition effect of charcoal could be improved by mixing wood and bamboo biochar with the proportion of 1:1. Different types of biochar mixed application technologies have good prospects in controlling the loss of soil phosphor, comprehensive experimental researches on the properties, application amount of biochar, type and fertility status of soil should be further strengthened for a more efficient biochar technology of soil improvement.