Impact of intensive agricultural management on carbon and nitrogen dynamics in the humid tropics

Purwanto, Benito Heru; Alam, Syamsu

doi:10.1080/00380768.2019.1705182

Cited by 55 publications

(19 citation statements)

References 123 publications

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“…If managed properly they could act as a C sink [85]. Several works highlighted that intensive agricultural practices contribute to greenhouse emissions [86][87][88]. In the case of urban agriculture, this can amplify the impacts of urban activities on climate change, and soil C sequestration service is lost.…”

Section: Discussionmentioning

confidence: 99%

Agricultural and Forest Land-Use Impact on Soil Properties in Zagreb Periurban Area (Croatia)

et al. 2020

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In urban areas, land use usually increases soil degradation. However, there are areas occupied by agriculture and woodlands with an essential role in provisioning food and other services such as water and climate regulation. The objective of this work was to assess the effect of long-term land use and soil management practices on peri-urban soils in Zagreb (Croatia). Samples were collected at depth 0–10 cm within intensively tilled cropland (CROP) and vineyard (VINE), traditional grass-covered orchard (ORCH), and forest (FOR). The results showed that bulk density was significantly higher in VINE and CROP than in ORCH and FOR. The opposite dynamic was observed in water-holding capacity, air-filled porosity, aggregate stability, organic matter, and soil organic matter stocks (SOCS). Soil water infiltration was higher in FOR plot compared to the other plots. Overall, land-use change had a substantial impact on soil properties and SOCS, especially in CROP and VINE soils. Tillage, pesticides, and fertilizer applications were presumably the reasons for altered soil quality properties. Intensively used areas (VINE and CROPS) may reduce soil ecosystems services such as the capacity for flood retention and C sequestration.

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Section: Discussionmentioning

confidence: 99%

Agricultural and Forest Land-Use Impact on Soil Properties in Zagreb Periurban Area (Croatia)

et al. 2020

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“…Quality soil, enriched with organic matter, boosts crop production. Incorporation of crop residues improves soil organic matter [19]. After harvesting the economic parts of field crops, residues, i.e., stem, leaves, husks, etc., play decisive roles in improving soil quality as well as addressing several environmental issues.…”

Section: Intensive Agriculture and Crop Residues: Present Statusmentioning

confidence: 99%

Management of Crop Residues for Improving Input Use Efficiency and Agricultural Sustainability

et al. 2020

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Crop residues, the byproduct of crop production, are valuable natural resources that can be managed to maximize different input use efficiencies. Crop residue management is a well-known and widely accepted practice, and is a key component of conservation agriculture. The rapid shift from conventional agriculture to input-intensive modern agricultural practices often leads to an increase in the production of crop residues. Growing more food for an ever-increasing population brings the chance of fast residue generation. Ecosystem services from crop residues improve soil health status and supplement necessary elements in plants. However, this is just one side of the shield. Indecorous crop residue management, including in-situ residue burning, often causes serious environmental hazards. This happens to be one of the most serious environmental hazard issues witnessed by the agricultural sector. Moreover, improper management of these residues often restrains them from imparting their beneficial effects. In this paper, we have reviewed all recent findings to understand and summarize the different aspects of crop residue management, like the impact of the residues on crop and soil health, natural resource recycling, and strategies related to residue retention in farming systems, which are linked to the environment and ecology. This comprehensive review paper may be helpful for different stakeholders to formulate suitable residue management techniques that will fit well under existing farming system practices without compromising the systems’ productivity and environmental sustainability.

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“…For example, Volpi et al (2018) reported a cumulative soil N2O emission of 0.87 kg N-N2O ha -1 for durum wheat seeded after clover, which included minimum tillage (i.e., disk harrow, at the beginning of September; depth, 0.10 m) without N fertilisation, in a Mediterranean environment. These data contribute to the definition of mitigation strategies for GHG emissions (Purwanto and Alam, 2020) that can be used for this crop rotation in a Mediterranean environment. Moreover, to increase the impact and effectiveness of the mitigation practices, these should be included in site-specific agro-environmental climate measures at the landscape scale (Toderi et al, 2017).…”

Section: Articlementioning

confidence: 99%

Soil N<sub>2</sub>O emissions after perennial legume termination in an alfalfa-wheat crop rotation system under Mediterranean conditions

et al. 2020

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Agricultural activities are potential sources of greenhouse gas (GHG) emissions, and nitrous oxide (N2O) is one of the most important non-carbon-dioxide GHGs. Perennial legumes such as alfalfa (Medicago sativa L.) have potential roles for reduction of soil GHG emissions as part of crop rotation systems. However, the implications of perennial legume termination by tillage and subsequent soil incorporation of the residues for reduced GHG emissions have been poorly examined in Mediterranean environments. With the aim to assess the magnitude of soil N2O emissions (important for the definition of mitigation strategies) after perennial legume termination in alfalfa-wheat crop rotation systems in a Mediterranean environment, we defined the hypothesis that alfalfa termination by tillage with incorporation of the crop residues will increase soil N2O emissions during the subsequent wheat season. To test this hypothesis, closed static chambers were used in a field–plot experiment, using a complete randomised block design with three replicates. Soil N2O emissions were monitored across 33 sampling dates from October 2017 to July 2018, as a comparison between an original 6-year-old alfalfa field (‘continuous alfalfa’) and alfalfa termination followed by wheat (‘alfalfa+ wheat’). The soil N2O emission fluxes varied markedly across the treatments and throughout the monitoring period (from – 0.02±0.01 to 0.53±0.14 g N-N2O ha–1 h–1, and from 0.02±0.07 to 0.37±0.11 g N-N2O ha–1 h–1 for continuous alfalfa and alfalfa+wheat, respectively), generally following the changes in soil temperature. Several soil N2O emission peaks were recorded for both treatments, which mainly coincided with rainfall and with increased soil water content. In the 2 months following alfalfa termination, alfalfa+wheat showed higher cumulative weekly soil N2O emissions compared to continuous alfalfa. Following alfalfa termination for alfalfa+wheat, the increased cumulative weekly soil N2O emissions appeared to be due to asynchrony between nitrogen (N) released into the soil from mineralisation of the alfalfa residues and N uptake by the wheat. Despite these initial high soil N2O emissions for alfalfa+wheat, the seasonal cumulative soil N2O emissions were not significantly different (0.77±0.09 vs 0.85±0.18 kg N-N2O ha–1 for continuous alfalfa and alfalfa+wheat, respectively). These data suggest that legume perennial crop termination in alfalfa–wheat rotation systems does not lead to significant loss of N2O from the soil. The alfalfa termination by tillage performed in autumn might, on the one hand, have slowed the mineralisation process, and might, on the other hand, have synchronised the N release by the mineralised crop residues, with the N uptake by the wheat reducing the soil N2O emissions.

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Impact of intensive agricultural management on carbon and nitrogen dynamics in the humid tropics

Cited by 55 publications

References 123 publications

Agricultural and Forest Land-Use Impact on Soil Properties in Zagreb Periurban Area (Croatia)

Agricultural and Forest Land-Use Impact on Soil Properties in Zagreb Periurban Area (Croatia)

Management of Crop Residues for Improving Input Use Efficiency and Agricultural Sustainability

Soil N<sub>2</sub>O emissions after perennial legume termination in an alfalfa-wheat crop rotation system under Mediterranean conditions

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