European Journal of Agronomy最新文献

{"title":"Co-implementation of deficit irrigation and nutrient management strategies to strengthen soil-plant-seed nexus, water use efficiency, and yield sustainability in fodder corn","authors":"Hanamant M. Halli ,&nbsp;B.G. Shivakumar ,&nbsp;V.K. Wasnik ,&nbsp;Prabhu Govindasamy ,&nbsp;V.K. Yadav ,&nbsp;Sunil Swami ,&nbsp;Vinod Kumar ,&nbsp;E. Senthamil ,&nbsp;Vinay M. Gangana Gowdra ,&nbsp;P.S. Basavaraj ,&nbsp;K.M. Boraiah ,&nbsp;C.B. Harisha","doi":"10.1016/j.eja.2025.127609","DOIUrl":"10.1016/j.eja.2025.127609","url":null,"abstract":"<div><div>Water scarcity-induced nutrient deficiency, low feed quality, and unsustainable fodder yields are important challenges for livestock production in tropical and subtropical countries, jeopardizing sustainable development goal-2: zero hunger. In this context, optimizing the co-benefits of deficit irrigation and fertilizer rates is crucial for strengthening the soil–plant–seed nexus, yield sustainability, water use efficiency (WUE), and the viability of progeny seed. Field experiments were carried for three years (2018–2021) in a split-plot design on a sandy loam soil of central India. Results revealed that moderate irrigation (I2) favored fodder corn root surface architecture (improved root length; 26.85–32.2 %, root weight; 24.5–31.45 %, and surface density; 24.51–32.87 %) and nutrients uptake (N, P, and K) due to increased nutrient accessibility. Likewise, balanced application of N, P, K, and Zn (N4; 120:60:40:20 kg ha⁻¹) had improved the corn roots and nutrient uptake (N; 93.56 kg ha⁻¹, P; 40.33 kg ha⁻¹, and K; 101.5 kg ha⁻¹). As a result, the integration of I2 × N4 had greater leaf area, seed (4.86 t ha⁻¹) and stover (9.62 t ha⁻¹) yields, WUE, and sustainable yield index (0.90). Furthermore, I2 × N4 enhanced the relative feed value and relative feed quality of corn seed and stover. Thus, maintained the vigor of progeny seedling (29.76 %). Therefore, the co-implementation of moderate deficit irrigation and balanced nutrition (I2 × N4) could optimize functional associations, minimize yield variations while improving WUE (by 28.6 %), root activity, optimize nutritional quality of corn feed (seed + stover), and increase the vigor of progeny seeds by strengthening soil–plant–seed nexus in limited conditions. By examining the interactions between soil, plant, and seed health, the research provides valuable insights into how irrigation and fertilization can work together to improve overall crop and feed quality.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127609"},"PeriodicalIF":4.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"LVR: A language and vision fusion method for rice diseases segmentation under complex environment","authors":"Tianrui Zhao,&nbsp;Honglin Zhou,&nbsp;Miying Yan,&nbsp;Guoxiong Zhou,&nbsp;Chaoying He,&nbsp;Yang Hu,&nbsp;Xiaoyangdi Yan,&nbsp;Meixi Pan,&nbsp;Yunlong Yu,&nbsp;Yiting Liu","doi":"10.1016/j.eja.2025.127599","DOIUrl":"10.1016/j.eja.2025.127599","url":null,"abstract":"<div><div>Accurate identification of rice diseases depends on high-quality disease segmentation. However, challenges such as the complexity of the rice field environment, interference from redundant information, and slow model convergence can hinder effective segmentation. To address these issues, we propose A Language and Vision Fusion Method for Rice Diseases Segmentation under complex environment (LVR), which combines CNN and Transformer architectures. First, we present the Efficient Wavelet-based Multi-scale Attention (EWWL) module, designed to enhance the model’s ability to capture fine details of disease regions in complex environments. Next, to mitigate information redundancy, we design the KAN-segmentation (KAN-seg) module for efficient feature extraction. Additionally, we propose a Self-Adaptive Gradient Enhancement (SAGE) algorithm that dynamically adjusts the network’s learning rate, thereby accelerating convergence. Experimental results demonstrate that the LVR method achieves exceptional accuracy and robustness in rice disease segmentation, even under challenging field conditions. This provides substantial technical support for intelligent agricultural disease management and offers promising applications, particularly in the realm of smart agricultural disease monitoring and management.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127599"},"PeriodicalIF":4.5,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The impact of intercrop design on weed suppression of species mixtures: A model-based exploration","authors":"Lammert Bastiaans,&nbsp;Wopke van der Werf","doi":"10.1016/j.eja.2025.127563","DOIUrl":"10.1016/j.eja.2025.127563","url":null,"abstract":"<div><div>Intercropping has frequently been reported to enhance weed suppression. A recent study combining a plant competition model and empirical data demonstrated that improved weed suppression results from a so-called selection effect, whereby the more weed suppressive crop species contributes disproportionate to the weed suppressive ability of intercrops. Here, we build on this finding and used the plant competition model to explore how species composition, mixing ratio, planting density and spatial arrangement influence the weed suppressive ability of annual intercropping systems. Analysis identified species composition as the principal design factor, since a difference in weed suppressive ability between crop species appeared the prime driver responsible for the above-average weed suppression of intercrops: the larger this difference the stronger the effect. With greatly differing levels of weed suppressive ability between crop species, even a small proportion of the stronger suppressive species greatly enhanced the intercrop’s ability to suppress weeds. In such a situation, mixing ratio can thus be used to regulate the trade-off between weed suppressiveness and the risk of the less competitive crop species being overgrown. Plant density was found to be a useful modulator if crop species displayed similar levels of weed suppression. In this case, intercrops in additive design were the only option to enhance weed suppression. Proximity of component species proved a prerequisite for superior weed suppressiveness. Consequently, in strip cropping systems, the improved weed suppressive ability rapidly declined with wider strips. The acquired quantitative insights form a theoretical foundation for considering weed suppression when designing multifunctional annual intercropping systems.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127563"},"PeriodicalIF":4.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combined effects of saline irrigation and genotype on the growth, grain yield and mineral concentration of durum wheat in hot arid areas","authors":"Ayesha Rukhsar ,&nbsp;Osama Kanbar ,&nbsp;Henda Mahmoudi ,&nbsp;Salima Yousfi ,&nbsp;José L. Araus ,&nbsp;Maria D. Serret","doi":"10.1016/j.eja.2025.127585","DOIUrl":"10.1016/j.eja.2025.127585","url":null,"abstract":"<div><div>Durum wheat cultivation in many parts of the Middle East is viable only under irrigation, often with saline water. This study evaluated the effects of salinity, season, and genotype on durum wheat grain yield and quality. Ten durum wheat genotypes were grown for two consecutive seasons under different irrigation salinities (2.6, 10, and 15 dSm⁻¹) in sandy soils at the International Center for Biosaline Agriculture (Dubai, UAE). Various traits were evaluated, including grain yield (GY), biomass, plant height, number of spikes per plant, thousand grain weight (TGW), chlorophyll content, and grain isotope composition. Salinity reduced GY, agronomic traits, and chlorophyll content, while increasing δ¹³C and sodium (Na) concentration in grains. The season effect significantly impacted GY, biomass, TGW, and some mineral concentrations, potentially due to heat waves during grain filling. The genotypic effect was significant for GY, agronomic traits, and concentrations of nitrogen and most minerals. A negative phenotypic correlation was found between GY and both Na and δ¹³C, suggesting that better water status and lower Na accumulation were linked to genotypes with improved performance. However, there was no negative trade-off across genotypes between grain yield and concentrations of most minerals. Moreover, the accumulation of N and several nutrients (P, Mg, Mn, Fe, Zn, Cu, S) in grains followed a similar pattern, with positive correlations observed. We conclude that genotypic variability is crucial to improving yield and modulating mineral content in durum wheat grown under saline irrigation in hot arid areas.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127585"},"PeriodicalIF":4.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143600160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Band applied K increases agronomic and economic efficiency of K fertilization in a crop rotation under no-till in southern Brazil","authors":"Gustavo Pesini ,&nbsp;Dayana Jéssica Eckert ,&nbsp;João Pedro Moro Flores ,&nbsp;Lucas Aquino Alves ,&nbsp;Dionata Filippi ,&nbsp;Gabriela Naibo ,&nbsp;André Luis Vian ,&nbsp;Christian Bredemeier ,&nbsp;Danilo Rheinheimer dos Santos ,&nbsp;Tales Tiecher","doi":"10.1016/j.eja.2025.127595","DOIUrl":"10.1016/j.eja.2025.127595","url":null,"abstract":"<div><div>The effectiveness of potassium (K) fertilizer management strategies on sandy clay loam soils under no-till (NT) is essential to achieving economically viable yields. This study compared the agronomic and economic efficiency of K fertilization using band application versus broadcast distribution on a subtropical Acrisol under NT. From 2019–2023, five K rates (0, 50, 100, 150, and 200 kg ha⁻¹) were applied annually using band and broadcast methods during spring/summer at corn or soybean sowing. There was no increase in grain crop yield with K broadcast application. This resulted in economic loss and significantly increased the available K levels in the topsoil, hampering the use of this soil layer to diagnose K availability and the likelihood of response to K fertilizers. The optimum agronomic and economic K rate matched the output K rate when the fertilizer was banded. The application of 50 kg ha⁻¹ of K increased 20 % the partial factor productivity, 300 % the agronomy efficiency, 680 % the economic profit from applied K, and 100 % the value cost ratio compared to the broadcast application. Even with available K above the critical level in the soil of the 0–10 cm layer, low rates of K fertilizers should be applied banded in the seed furrow.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127595"},"PeriodicalIF":4.5,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Leaf area index (LAI) prediction using machine learning and UAV based vegetation indices","authors":"Saddam Hussain ,&nbsp;Fitsum T. Teshome ,&nbsp;Boaz B. Tulu ,&nbsp;Girma Worku Awoke ,&nbsp;Niguss Solomon Hailegnaw ,&nbsp;Haimanote K. Bayabil","doi":"10.1016/j.eja.2025.127557","DOIUrl":"10.1016/j.eja.2025.127557","url":null,"abstract":"<div><div>As a critical indicator of plant growth and water use, accurately and promptly estimating leaf area index (LAI) is critical for improved crop management. However, measuring LAI requires substantial effort and time . The main objective of this study was to leverage vegetation indices (VIs) generated from unmanned aerial vehicle (UAV)-based images and machine learning (ML) techniques for estimating LAI of green beans and sweet corn. The research was conducted at the Tropical Research and Education Center (TREC), University of Florida, Homestead, Florida over three seasons from 2020-2023. The experiment for each crop consisted of four irrigation treatments, i.e., 100 % full irrigation (FI), 75 %, 50 %, and 25 % FI, with four replications. Destructive leaf samples were collected by cutting plants from 30 cm row length of two inner plot rows and leaf area (LA) was measured using a LI-3000C transparent belt conveyor. Plant height and canopy width were also measured bi-weekly. Moreover, a UAV-based RedEdge-MX sensor was employed throughout the seasons to collect high-resolution multispectral imageries that consist of five bands. Plant LAI was calculated using the plant density method from measured LA. A calibrated DSSAT model was used to simulate the LAI for both crops.. Simulated LAI from DSSAT was compared against measured LAI, and relationships were established between simulated LAI and 12 VIs generated from UAV images. Additionally, ML algorithms, i.e., random forest (RF), eXtreme gradient boosting (XGB), and light gradient boosting (LGB) models, were trained to predict LAI for both crops using VIs as input features. Results showed DSSAT's perfroamnce in simulating LAI was good for green beans and reasonable for sweet corn. Out of the 12 indices tested, six VIs, i.e., Enhanced Vegetation Index 2 (EVI2), Normalized Difference Vegetation Index (NDVI), Normalized Green Red Difference Index (NGRDI), NIR-RE Normalized Difference Vegetation Index (NIRRENDVI), Red-Edge Normalized Vegetation Index (RENDVI), and Soil Adjusted Vegetation Index (SAVI) showed a good agreement with simulated LAI for both crops. The LGB, RF, and XGB models predicted LAI with acceptable accuracy, achieving r² values of 0.78, 0.90, and 0.90 and RMSE values of 0.43, 0.29, and 0.28 for sweet corn and r² of 0.72, 0.79, and 0.80 and RMSE of 1.01, 0.86, and 0.85 for green beans, respectively. The findings indicate that ML models and VIs derived from UAV imagery could be used to predict LAI with acceptable accuracy for green beans and sweet corn.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127557"},"PeriodicalIF":4.5,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing planting density and post-silking growth degree days effectively accelerates summer maize grain dehydration","authors":"Jiyu Zhao,&nbsp;Yuqi Xue,&nbsp;Sher Alam,&nbsp;Peng Liu,&nbsp;Baizhao Ren,&nbsp;Bin Zhao,&nbsp;Ningning Yu,&nbsp;Jiwang Zhang","doi":"10.1016/j.eja.2025.127584","DOIUrl":"10.1016/j.eja.2025.127584","url":null,"abstract":"<div><div>The efficacy of mechanical maize grain harvesting is significantly enhanced by reducing the grain moisture content at the stage of physiological maturity. Nonetheless, the determinants affecting grain moisture content during this phase remain inadequately explained. Field experiments were conducted from 2021 to 2023, including planting density experiment and sowing date experiment. The preeminent contribution to the grain dehydration rate was identified as the husk’s transpiration rate, succeeded by the leaf transpiration rate, culminating in a synergistic contribution ratio of 53.1 %. Excess water in the ear was capable of being redirected back into the ear-pedicel, with the majority of it being lost to the air through the husk, and only a small portion being returned to the plant stem. The grain moisture content was significantly affected by growing degree days (GDDs) at the grain filling stage. An escalation in planting density precipitated variegated performances among the two hybrids: for each increment of 100℃ d in GDDs, the moisture content variation for DH187 across densities ranged from between 6.3 % and 6.9 %, contrasting with a narrower range of 6.0–6.2 % for DH605. Grain moisture content was jointly regulated by the moisture content of both the husk and leaves, as well as the rate of water loss from the grain surface. Higher GDDs from silking to the physiological maturity stage, a larger ear angle, and increased looseness of grain arrangement likely accelerated the rate of water loss from the grain surface, thereby reducing the grain moisture content at physiological maturity.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127584"},"PeriodicalIF":4.5,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Putting numbers to a metaphor: A Bayesian Belief Network with which to infer Soil Quality and Health","authors":"Kirsty L. Hassall ,&nbsp;Joanna Zawadzka ,&nbsp;Alice E. Milne ,&nbsp;Ronald Corstanje ,&nbsp;James A. Harris ,&nbsp;A. Gordon Dailey ,&nbsp;Aidan M. Keith ,&nbsp;Margaret J. Glendining ,&nbsp;S.P. McGrath ,&nbsp;Lindsay C. Todman ,&nbsp;Paul Alexander ,&nbsp;Philippa Arnold ,&nbsp;Amanda J. Bennett ,&nbsp;Anne Bhogal ,&nbsp;Joanna M. The late Clark ,&nbsp;Felicity V. Crotty ,&nbsp;Claire Horrocks ,&nbsp;Nicola Noble ,&nbsp;Robert Rees ,&nbsp;Matthew Shepherd ,&nbsp;A.P. Whitmore","doi":"10.1016/j.eja.2025.127537","DOIUrl":"10.1016/j.eja.2025.127537","url":null,"abstract":"<div><div>Soil Quality or Soil Health are terms adopted by the scientific community as metaphors for the effects of differing land management practices on the properties and functions of soil. Because they are metaphors, consistent quantitative definitions are lacking. We present here an approach based on expert elicitation in the field of soil function and management that offers a universal way of putting numbers to the metaphor. Like humans, soils differ and so do the ways in which they are understood to become unhealthy. Long-term experiments such as the Broadbalk Wheat experiment at Rothamsted provide unparalled sources of data with which to investigate the state and changes of soil quality and health that have developed from known management over timescales of one hundred years or more. Similarly, large-scale datasets such as the National Soils Inventory and Countryside Survey provide rich resources to explore the geographical variability of soil quality and health in different places against a background of different observed management practices. We structure experts’ views of the extent to which soil delivers the functions expected of it within Bayesian Belief Networks anchored by measurable properties of soil. With these networks, we infer the likely state of soil (i) on Broadbalk, (ii) at locations throughout England &amp; Wales as well as inferring (iii) the most straightforward ways of improving soil quality and health at the locations in (ii). Our methodology has general applicability and could be deployed elsewhere or in other disciplines.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127537"},"PeriodicalIF":4.5,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing irrigation and mulching strategies to improve root–water relations, water use efficiency, and yield in apple–soybean alley cropping systems on the Loess Plateau, China","authors":"Li Chen ,&nbsp;Ruoshui Wang ,&nbsp;Wan Xiao ,&nbsp;Lisha Wang","doi":"10.1016/j.eja.2025.127586","DOIUrl":"10.1016/j.eja.2025.127586","url":null,"abstract":"<div><div>The productivity of young apple-soybean alley cropping systems (ASCS) in the Loess Plateau of northwestern Shanxi, China, is threatened by water scarcity and interspecific competition as fruit trees mature. Research on interspecies water utilization in precision irrigation with lateral drip line layouts is limited. A 3-year study evaluated the effects of three drip emitter spacings (L1: one line per soybean row; L2: one every two rows; L3: one every three rows) combined with mulching (M1) and non-mulching (M0) on soil water content (SWC), root distribution, grain yield (GY), and water-use efficiency (WUE) in ASCS. Additionally, two non-irrigated control treatments were included: CK1 (mulching) and CK0 (non-mulching). The results showed that mulching increased SWC (23.59 %) and root length density (RLD) (49.01 %) in the 0–60 cm layer, accompanied by higher water consumption. However, it alleviated the detrimental water competition caused by drought under non-irrigated (CK1) conditions. The narrow L1 and wide L3 emitter spacings exhibited opposing moisture distribution patterns, both restricting root growth in the intercropping system. Notably, L3 reduced soybean RLD by 56.35 % compared to L1. In contrast, the optimal drip spacing L2 created alternating wet and dry zones, enhancing the soil water potential gradient. This distribution promoted opposing root expansion and mitigated competition for water absorption over the growing seasons. Among non-mulched treatments, L1 achieved the highest WUE and GY, increasing by 60.17 % over other non-mulched treatments. In mulched treatments, L2 maximized GY and WUE, increasing by 56.32 % and 46.78 %, respectively, compared to non-mulched L2 treatment. Therefore, one emitter line per soybean row under non-mulched conditions and one per two rows under mulched conditions in 3–6-year-old ASCS is recommended to optimize root-water distribution and improve productivity.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"168 ","pages":"Article 127586"},"PeriodicalIF":4.5,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143591626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crop and fallow contribution to N2O emissions of contrasting crop sequences","authors":"V.C. Gregorutti ,&nbsp;L.E. Novelli ,&nbsp;A. Cuatrín ,&nbsp;B.G. Benedit ,&nbsp;O.P. Caviglia","doi":"10.1016/j.eja.2025.127582","DOIUrl":"10.1016/j.eja.2025.127582","url":null,"abstract":"<div><div>Crop sequences (CS) in South America, characterized by a high proportion of soybean and a concerning soil nutrient mining, urgently require reconfiguration towards more sustainable cropping systems. New configurations of CS may impact nitrous oxide (N₂O) emissions. Although reported reported at the CS level in a few studies, the specific contributions of each sequence component, such as fallow periods or crops, have rarely been thoroughly analyzed. The aims were: i) to quantify total N₂O emission from different CS with contrasting cropping intensity in a long-term experiment that included all phases, ii) evaluate the drivers of N₂O emission fluxes and iii) estimate the contribution of each component of the CS to total N₂O emissions. The study was conducted combining crops of soybean (S), maize (M), wheat (W) and field pea (P), from S and M in monoculture to intensified CS with four crops in two years, which included W/S and P/M double crops. We simultaneously measured N-N₂O emission, soil nitrate content (N-NO₃) and water-filled pore space (WFPS) approximately twice a month during two seasons (2019/20–2020/2021). Low frequencies of elevated values were observed in both N-N₂O emissions and N-NO₃ levels across all CS. Cumulative N-N₂O emissions of CS during two seasons averaged 881 g ha⁻¹, being higher in M-W/S and P/M-W/S, than other CS, not attributable to their configuration nor N inputs. We detected more differences between phases of the same CS than among CS. The contribution of each component of CS was different depending on the CS and their respective phase. We did not find close associations between WFPS or N-NO₃ vs N-N₂O fluxes. The annualized emission factor obtained at CS level were in the lower bound of the values range usually cited, even slightly lower. The study highlights the importance of including the phase of rotation in studies dealing with N-N₂O measurements was reemphasized. Strategies that focus on increasing grain yields and reducing fallow periods remain effective in minimizing emissions per unit of production. These approaches also promote income stability and soil health by facilitating the return of crop residues, contributing to both environmental and economic sustainability.</div></div>","PeriodicalId":51045,"journal":{"name":"European Journal of Agronomy","volume":"167 ","pages":"Article 127582"},"PeriodicalIF":4.5,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}