Effects of Different Fertilization Regimes and Fertilization Ages on Size Distribution and Stability of Soil Aggregates

XIE Junyu; CAO Hanbing; MENG Huisheng; GUO Yanhan; HONG Jianping; ZHANG Jie; LI Yunxiao; LI Tingliang

doi:10.13870/j.cnki.stbcxb.2020.03.041

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Effects of Different Fertilization Regimes and Fertilization Ages on Size Distribution and Stability of Soil Aggregates

更新时间：2025-03-12

- Effects of Different Fertilization Regimes and Fertilization Ages on Size Distribution and Stability of Soil Aggregates
- Vol. 34, Issue 3, Pages: 274-281(2020)
- 作者机构：
  
  1. 山西农业大学资源与环境学院, 山西太谷,030801
  2. 土壤环境与养分资源山西省重点实验室,太原,030031
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.03.041
  CLC： S157.1
- Published：2020
- 稿件说明：
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XIE Junyu, CAO Hanbing, MENG Huisheng, et al. Effects of Different Fertilization Regimes and Fertilization Ages on Size Distribution and Stability of Soil Aggregates[J]. 2020, 34(3): 274-281.
DOI：

XIE Junyu, CAO Hanbing, MENG Huisheng, et al. Effects of Different Fertilization Regimes and Fertilization Ages on Size Distribution and Stability of Soil Aggregates[J]. 2020, 34(3): 274-281. DOI： 10.13870/j.cnki.stbcxb.2020.03.041.

摘要

土壤团聚体的数量和质量直接影响着土壤性质和有机碳固存。研究不同施肥措施及施肥年限对采煤塌陷区复垦土壤团聚体的重量分布比例及其稳定性的影响，可为该区农业生产和土壤质量提升提供科学依据。采集复垦6，11年定位试验不同施肥处理耕层（0—20 cm）土样，选取不施肥（CK）、平衡施氮磷钾化肥（NPK）、单施有机肥（M）、有机无机肥配施（MNPK）4个处理，利用干筛法和湿筛法获得4种粒径的团聚体/粉黏粒组分（> 2，0.25~2，0.053~0.25，< 0.053 mm），用>0.25 mm团聚体的含量（R0.25）、平均重量直径（MWD）、团聚体破坏率（PAD）和土壤不稳定团粒指数（ELT）表示团聚体的稳定性，同时测定土壤有机碳含量。结果表明：施肥年限较施肥措施对土壤团聚体的含量及稳定性产生了更显著的影响。干筛条件下，施肥6，11年均显著降低了各处理0.053~0.25 mm团聚体和< 0.053 mm组分的含量，降幅分别为68.39%~87.37%，69.63%~78.32%（6年）和90.01%~93.68%，78.29%~83.93%（11年）；湿筛条件下，施肥11年显著提高了各处理> 2 mm团聚体的含量，增幅达473.35%~645.16%，但是显著降低了0.053~0.25 mm团聚体的含量，降幅为43.67%~57.54%。土壤团聚体的稳定性也随着施肥年限的增加而逐渐增强，表现为DR0.25、WR0.25和MWD值呈增加趋势，而PAD和ELT值呈降低趋势。土壤有机碳含量与DR0.25、WR0.25、MWD水稳性呈极显著正相关关系，而与PAD和ELT呈极显著负相关关系。本研究表明，该区域连续培肥11年提高了土壤大团聚体的含量而伴随着微团聚体含量的显著减少，导致土壤结构越来越稳定。这对于提高采煤塌陷区复垦土壤肥力、改善土壤结构产生了良好的效果。

Abstract

The quantity and quality of soil aggregates directly affect soil properties and soil organic carbon (SOC) sequestration. This study investigated effects of various fertilization regimes and fertilization ages on the distribution and stability of dry aggregates and water-stable aggregates

aiming at providing a scientific basis for improving agricultural production and soil quality in long-term reclaimed areas

Shanxi Province

China. Surface soil samples of 0-20 cm horizons under different fertilization regimes were collected from 6-years and 11-years reclaimed areas

respectively. There are 4 different fertilization treatments (no fertilizer (CK)

chemical fertilizer with nitrogen

phosphorus

and potassium (NPK)

organic manure alone (M)

and chemical fertilizer combined with manure (MNPK)). All samples were separated into four aggregate-size fractions (>2

0.25~2

0.053~0.25 and <0.053 mm) by dry sieving and wet sieving methods. The >0.25 mm aggregate content (R0.25)

mean weight diameter (MWD)

proportion of aggregate destruction (PAD) and unstable soil aggregate index (ELT) were used to indicate the stability of aggregates. The SOC content in the bulk soil was determined. The fertilization age had a more significant effect on the distribution and stability of soil aggregates than the fertilization regime. Under the dry sieving condition

the distribution of 0.053~0.25 mm and <0.053 mm fractions in each treatment was reduced significantly at both fertilization ages

with a decrease of 68.39%~87.37%

69.63%~78.32% (6-years) and 90.01%~93.68%

78.29%~83.93% (11-years); under the wet sieving condition

the distribution of >2 mm fraction increased significantly by 473.35%~645.16%

but the distribution of 0.053~0.25 mm fraction was significantly decreased by 43.67%~57.54% after 11-years reclamation. The stability of soil aggregates was also gradually enhanced with the increase of fertilization ages

showing that the distribution of DR0.25

WR0.25 and MWD had an increasing trend

but the PAD and ELT had a decreasing trend. SOC content showed an extremely significant positive correlation with the DR0.25

WR0.25 and MWDwater-stable

but an extremely significant negative correlation with PAD and ELT. It was concluded that the SOC content in the study area increased significantly after 11 years of consecutive fertilization

resulting in a more and more stable soil structure. It was conducive to improve stability of aggregates in this reclaimed area.

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