Impact of Long-term Fertilization Based on Meta-analysis on Stability of Soil Aggregates in Chinese Farmland

doi:10.11924/j.issn.1000-6850.casb2024-0614

Abstract

Abstract:

Soil aggregates are essential indicators of soil structure and fertility, significantly influenced by management practices, including the type of fertilizer used. This study aimed to investigate the effects of long-term fertilization on soil aggregate stability, measured by mean weight diameter (MWD), and to analyze the roles of various fertilization types, cropping systems, and soil types. We collected data from 48 published studies to create a comprehensive database on different fertilization practices and their impact on aggregate stability, including 292 independent paired data sets. Meta-analysis was employed to evaluate the effects of fertilization on soil aggregate stability. The findings revealed that, compared to no fertilization, the application of chemical fertilizers, organic fertilizers, and combined organic-inorganic fertilizers significantly enhanced soil aggregate MWD. Specifically, the impacts of combined organic-inorganic fertilization (an increase of 21.46%) and single organic fertilization (an increase of 17.17%) were 7.9 times and 6.4 times greater than that of single chemical fertilization (an increase of 6.22%), respectively. Additionally, the effect of straw application on MWD (27.79%) was significantly higher than that of manure (14.01%). Furthermore, the duration of fertilization was significantly negatively correlated with MWD, while annual precipitation, evaporation, and temperature were all significantly positively correlated with MWD. The optimal fertilization amounts were determined to be > 0.3 t/hm² chemical fertilizers, 5-10 t/hm² organic fertilizers, and 1-10 t/hm² combination of organic and inorganic fertilizers, all of which significantly enhanced the stability of soil aggregates. Additionally, soil properties and environmental factors, such as pH, total nitrogen, total phosphorus, and total potassium, also influenced these effects. This study highlighted that the type of fertilization played a significant role in determining the stability of soil aggregates, underscoring the importance of organic fertilizers and combined organic-inorganic fertilization for improving soil structure. The results provided vital evidence for optimizing soil management practices.

Key words: soil aggregates, Meta-analysis, soil structure, long term fertilization, Chinese farmland

TANG Yingying, TANG Xian, ZHAO Jianrong. Impact of Long-term Fertilization Based on Meta-analysis on Stability of Soil Aggregates in Chinese Farmland[J]. Chinese Agricultural Science Bulletin, 2025, 41(9): 117-126.

Figures/Tables 7

References 33

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筛分方式	土地利用类型		土壤类型			作物类型				种植制度
筛分方式	水田	旱地	红壤	黄壤	棕壤	其他	水稻	小麦	玉米	其他	一年一熟	一年两熟
干筛法	13	67	19	33	19	9	13	47	20	—	56	24
湿筛法	57	155	42	3	62	104	52	69	65	26	98	114

筛分方式	土地利用类型		土壤类型			作物类型				种植制度
筛分方式	水田	旱地	红壤	黄壤	棕壤	其他	水稻	小麦	玉米	其他	一年一熟	一年两熟
干筛法	13	67	19	33	19	9	13	47	20	—	56	24
湿筛法	57	155	42	3	62	104	52	69	65	26	98	114