Influence of Freezing and Thawing on Available Phosphorus Content of Black Soil

FAN Haoming; ZHOU Lili; HUANG Donghao

doi:10.13961/j.cnki.stbctb.2015.03.011

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Influence of Freezing and Thawing on Available Phosphorus Content of Black Soil

- Influence of Freezing and Thawing on Available Phosphorus Content of Black Soil
- Bulletin of Soiland Water Conservation Vol. 35, Issue 3, Pages: 18-22(2015)
- 作者机构：
  
  沈阳农业大学水利学院,辽宁,沈阳,110866
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.03.011
  CLC：
- Published：2015
- 稿件说明：
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FAN Haoming, ZHOU Lili, HUANG Donghao. Influence of Freezing and Thawing on Available Phosphorus Content of Black Soil[J]. Bulletin of Soiland Water Conservation, 2015, 35(3): 18-22.
DOI：

FAN Haoming, ZHOU Lili, HUANG Donghao. Influence of Freezing and Thawing on Available Phosphorus Content of Black Soil[J]. Bulletin of Soiland Water Conservation, 2015, 35(3): 18-22. DOI： 10.13961/j.cnki.stbctb.2015.03.011.

摘要

[目的] 分析冻融循环作用和土壤含水率对土壤磷素的有效性产生的影响

为控制农业非点源污染、明确冻土区土壤的磷素循环过程和准确评估区域的磷素收支提供依据。[方法] 以东北黑土为研究对象

研究冻融次数、土壤含水率和土壤有效磷背景值对黑土有效磷含量的影响。采用室内模拟冻融循环的方法

冻融循环次数为30次

冻融温差为-10~7 ℃

监测冻融条件下黑土有效磷含量的变化。[结果] 随着冻融循环次数的增加

它对有效磷含量的影响逐渐下降

至20~30次循环中不具有显著性影响

有效磷背景值的影响在5~20和20~30次循环中占主导地位;在0~30次冻融循环中

有效磷含量的变化表现出双峰型曲线特征

相邻冻融循环次数有效磷含量的变化大多具有显著性差异

变化由剧烈到平缓;土壤含水率越高

有效磷含量变化越剧烈;土壤有效磷背景值越高

有效磷含量越稳定。[结论] 冻融循环次数、土壤含水率、土壤有效磷背景值3个控制因子对有效磷含量的影响程度随冻融循环次数的增加而变化。

Abstract

[Objective] To analyze the fluence of the freezing and thawing action and soil water content on soil available phosphorus in order to provide the basis for controlling agricultural non-point source pollution

confirming the phosphorus cycle process of soil in permafrost region

and assessing regional balance of the accurate phosphorus further.[Methods] Black soil in northeast China was sampled to quantify the effects of variable freeze-thaw cycles(FTCs)

soil water(W) contents and contents of background available phosphorus (APb) on AP content. Soil samples were conducted to indoor simulated experiment with a maximum FTCs of 30 times and controlled temperature between -10 ℃ and 7 ℃. [Results] The effects of FTC decreased and no significant differences were found when FTCs fell between 20 and 30

while the APb content was the prominent factor during 5 to 20 and 20 to 30 cycles. During the whole 30 FTCs

soil AP content variation showed a characteristics of bimodal distribution. Meanwhile AP contents between adjacent FTCs showed significantly difference

the amount of which changed moderately with increase of FTCs changes in AP content were larger with a higher W content

and more stable with a higher APb content.[Conclusion] It showed that the impact of the three factors

FTC

W content and APb content

on AP content varied as the number of FTCs increased.

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references

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