Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

Song, Xiangyun; Liu, Shutang; Liu, Qinghua; Zhang, Wenju; Hu, Chunguang

doi:10.1016/s2095-3119(13)60713-3

Cited by 56 publications

(26 citation statements)

References 22 publications

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“…This suggests the above findings are supportive to our current results. On the other hand, the relatively lower percent of variance explained by edaphic factor in our study (8.9–39.7%) can be due to other abiotic processes leading to SOC additions or losses such as manure amendments, plant residual and root exudates and DOC leaching 18 48 .…”

Section: Discussioncontrasting

confidence: 57%

Three-decade long fertilization-induced soil organic carbon sequestration depends on edaphic characteristics in six typical croplands

Liang

Yang

et al. 2016

Sci Rep

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Fertilizations affect soil organic carbon (SOC) content but the relative influences of the edaphic and climate factors on SOC storage are rarely studied across wide spatiotemporal scales. This study synthesized long-term datasets of fertilization experiments in six typical Chinese croplands, and calculated annual C input from crops and manure amendments, changes in SOC storage (ΔSOC) and C sequestration efficiency (i.e. the percentage of soil C change per unit of C input, hereafter referred as CSE) in 0–20 cm soil over three decades. Three fertilization treatments include no fertilization (CK), chemical nitrogen, phosphorus and potassium fertilizers (NPK) and combined chemical fertilizers and manure (NPKM). Results showed significant fertilization effects on C input and ΔSOC (NPKM>NPK>CK), and significantly higher CSE in Qiyang at Hunan than Zhengzhou at Henan and Heihe at Heilongjiang. The variance partitioning analysis (VPA) showed more variance of CSE can be explained by edaphic factors (up to 39.7%) than other factors. Furthermore, soil available N content and pH were identified as the major soil properties explaining CSE variance. This study demonstrated key controls of soil fertility factors on SOC sequestration and informs the need to develop strategic soil management plan to promote soil carbon sequestration under long-term intensive fertilization.

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Section: Discussioncontrasting

confidence: 57%

Three-decade long fertilization-induced soil organic carbon sequestration depends on edaphic characteristics in six typical croplands

Liang

Yang

et al. 2016

Sci Rep

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“…In total, 48 samples (4 long-term experimental sites × 4 treatments × 3 replicates) from the top 0 to 20 cm of bulk soil were collected. Detailed information for HLJ, SD, AH, and JX regarding the amount of fertilization and chemical characteristics of the initial field soil was provided in previous publications (see Table S4 in the supplemental material) ( 27 – 30 ).…”

Section: Methodsmentioning

confidence: 99%

Long-Term Chemical-Only Fertilization Induces a Diversity Decline and Deep Selection on the Soil Bacteria

Ling

Chen

et al. 2020

mSystems

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Fertilization regimes are known to drive succession of the soil microbial community, whereas the assembly rules involved remain elusive. Moreover, the ecological roles of microbial “generalists” and “specialists” in soils with contrasting fertilization regimes have not been characterized. We explored how long-term fertilization regimes (i.e., treatments conducted for at least 30 years) impact the soil bacteria by modifying species richness, diversity, bacterial assembly, and niche breadth. Compared with long-term organic fertilizer input, the soils having undergone chemical-only fertilization contained smaller amounts of carbon resources and had a more acidic environment. This strong environmental constraint lowered the soil bacterial reservoir and resulted in a detectable ecoevolutionary transformation, with both a higher proportion of specialists and a stronger signature of deterministic processes. Overall, this study provided a new comprehensive understanding of the assembly rules of bacterial generalists and specialists under long-term fertilization regimes. This study also highlighted that chemical-only fertilization, a ubiquitous agricultural practice of current conventional agriculture, induced a strong and similar environmental force that transformed the soil microbiota from 28°N to 46°N included in this study. IMPORTANCE Chemical-only fertilization is ubiquitous in contemporary conventional agriculture despite the fact that sustainability of this agricultural practice is increasingly being questioned because of the current observed soil degradation. We explored how long-term chemical-only versus organic-only fertilizations impacted the soil microbiota reservoir in terms of both diversity and induced assembly processes. The results showed that long-term chemical-only fertilization resulted in deep selection pressure on the soil microbial community reservoir, with both a higher proportion of specialists and a stronger signature of deterministic processes. The soil microbiota has clearly changed as a consequence of the fertilization regime. The diagnoses of the functional consequences of these ecoevolutionary changes in relation to agricultural practices are key to imagining agriculture in the time ahead and especially regarding future efforts for the conservation, restoration, and management of the soil microbiota reservoir which is key to the fertility of the ecosystem.

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“…As shown in Table 1 , the first long-term experiment was located in Jilin Province (JL) and was initiated in 1990; the climatic conditions, cropping system and physical and chemical characteristics of the initial field soil were all introduced in our previous paper 17 . The second long-term experiment was located in Shandong Province (SD) and has been performed since 1978; detailed information about the climate, cropping system and physical and chemical characteristics of the initial field soil in this experiment was described by Song et al 31 . The third long-term experiment was set in Anhui Province (AH), which is located in the Yangliu experimental base of Anhui agricultural academy and was conducted starting in 1981 with wheat-maize rotation.…”

Section: Methodsmentioning

confidence: 99%

Soil ionomic and enzymatic responses and correlations to fertilizations amended with and without organic fertilizer in long-term experiments

Feng

Ling

Chen

et al. 2016

Sci Rep

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To investigate potential interactions between the soil ionome and enzyme activities affected by fertilization with or without organic fertilizer, soil samples were collected from four long-term experiments over China. Irrespective of variable interactions, fertilization type was the major factor impacting soil ionomic behavior and accounted for 15.14% of the overall impact. Sampling site was the major factor affecting soil enzymatic profile and accounted for 34.25% of the overall impact. The availabilities of Pb, La, Ni, Co, Fe and Al were significantly higher in soil with only chemical fertilizer than the soil with organic amendment. Most of the soil enzyme activities, including α-glucosidase activity, were significantly activated by organic amendment. Network analysis between the soil ionome and the soil enzyme activities was more complex in the organic-amended soils than in the chemical fertilized soils, whereas the network analysis among the soil ions was less complex with organic amendment. Moreover, α-glucosidase was revealed to generally harbor more corrections with the soil ionic availabilities in network. We concluded that some of the soil enzymes activated by organic input can make the soil more vigorous and stable and that the α-glucosidase revealed by this analysis might help stabilize the soil ion availability.

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Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

Cited by 56 publications

References 22 publications

Three-decade long fertilization-induced soil organic carbon sequestration depends on edaphic characteristics in six typical croplands

Three-decade long fertilization-induced soil organic carbon sequestration depends on edaphic characteristics in six typical croplands

Long-Term Chemical-Only Fertilization Induces a Diversity Decline and Deep Selection on the Soil Bacteria

Soil ionomic and enzymatic responses and correlations to fertilizations amended with and without organic fertilizer in long-term experiments

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