Soil Science and Plant Nutrition最新文献

{"title":"Root response of soybean genotypes to low phosphorus availability from juvenile to adult vegetative stages","authors":"Mai Furuya, Myra Shin, Hiroyuki Masumoto, Shiho Takata, Junpei Takano, A. Matsumura","doi":"10.1080/00380768.2021.2022965","DOIUrl":"https://doi.org/10.1080/00380768.2021.2022965","url":null,"abstract":"ABSTRACT Due to the rapid exhaustion of global phosphorus (P) resources, P-efficient crops are required. In this study, we used various soybean genotypes collected from around the world and investigated the morphophysiological responses of their roots to low-P conditions at the cotyledon emergence (VE), unifoliate leaves emergence (VC), and fourth trifoliate leaflet emergence (V4) growth stages. First, we compared the growth of 81 soybean genotypes under different P conditions at the VC stage. The root morphology of most genotypes did not differ according to P conditions. However, GmWMC138 showed increased root weight under low-P conditions at the VC stage, and was therefore selected for further comparative analysis with genotypes with similar seed weights. Four selected genotypes were compared in terms of their seed storage P content and responses of plant growth and phytase and acid phosphatase activities to low-P conditions at the VE and VC stages. The inorganic-P (Pi) levels and shoot growth at the VE and VC stages of GmWMC138 were less affected by low-P conditions compared to the other genotypes. In this genotype, root fresh weight at the VC stage, phytase activity in roots at the VE stage, and acid phosphatase activity in roots at the VC stage increased under low-P conditions. The differences in these enzyme activities may have led to the maintenance of root Pi content and subsequent increase in the root fresh weight at the VC stage under low-P conditions. In addition, the low-P responses of growth and P content at the V4 stage were compared among the selected genotypes. In GmWMC138, fine-root length increased and total P content was maintained under low-P conditions compared to normal-P conditions. These results imply that in soybeans morphological changes in roots in response to low-P conditions at juvenile growth stages, such as the VE and VC stages, may contribute to P-deficiency tolerance in subsequent growth stages, such as the V4 stage.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"30 1","pages":"361 - 373"},"PeriodicalIF":2.0,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85333495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 effects of simulated acid rain and cadmium-containing atmospheric fine particulate matter on the pakchoi (Brassica campestris. L) seedlings growth and physiology","authors":"Y. Zha, J. Tang, Yang Pan","doi":"10.1080/00380768.2021.2023826","DOIUrl":"https://doi.org/10.1080/00380768.2021.2023826","url":null,"abstract":"ABSTRACT Acid rain (AR) and atmospheric particulate matter (APM) are important environmental issues that often occur simultaneously in agricultural regions, the combined pollution of AR and atmospheric fine particles (PM2.5) containing heavy metals has negatively affected the growth of seedlings and has become a hot research topic. In this paper, we established exposure scenarios to simulate the AR and the cadmium-containing PM2.5 (PM2.5-Cd) pollutions. Under the scenarios, hazardous impacts of AR and PM2.5-Cd on growth, physiological and biochemical characteristics of pakchoi were evaluated. After being exposed simulated AR and PM2.5-Cd for 21 days, our results indicate that: single treatment with either AR (pH 5.5) or PM2.5-Cd, or a combined treatment of AR (pH 5.5) and PM2.5-Cd (150, 300 μg·m−3) increased the growth of pack hoi seedlings. Combined treatments with low-acidity AR (pH 3.5) and PM2.5-Cd (500 μg·m−3), significantly decreased the growth and the Soil and Plant Analyzer Development (SPAD) of pakchoi, and it also induced a significantly increase in foliar MDA content and catalase (CAT) activity, while decreasing peroxidase (POD) and superoxide dismutase (SOD) activity. The Cd concentration of leaves increased with an increasing PM2.5-Cd concentration. Correlation analysis indicated that the growth and SPAD of pakchoi were highly correlated with the foliar MDA content and enzyme activities under the combined treatments with AR and PM2.5-Cd treatment. Our results might serve as a guide to increase agricultural production and food crop safety in areas with high levels of AR and PM2.5 pollution.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"48 1","pages":"317 - 328"},"PeriodicalIF":2.0,"publicationDate":"2022-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86713576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbon and nitrogen dynamics as affected by land-use and management change from original rice paddies to orchard, wetland, parking area and uplands in a mountain village located in Shonai region, Northeast Japan","authors":"P. N. Kusumawardani, P. Bimantara, J. Guigue, Chihiro Haga, Yuta Sasaki, V. Kautsar, S. Kimani, Toan Nguyen-Sy, Shuirong Tang, B. Purwanto, S. Utami, K. Tawaraya, Kazuaki Sugawara, W. Cheng","doi":"10.1080/00380768.2021.2017235","DOIUrl":"https://doi.org/10.1080/00380768.2021.2017235","url":null,"abstract":"ABSTRACT This study investigated the effect of land-use and management change (LUMC) on carbon (C) and nitrogen (N) dynamics after 15–40 years. LUMC constituted change from rice paddies to chestnut orchard, wetland, and buckwheat upland fields in Shonai region, Yamagata Prefecture, Northeast Japan. Soil samples were collected from the top – (0–15 cm) and sub-layers (15–30 cm) for analysis of soil organic C (SOC) and its δ13C value, total N (TN), and their stocks. C decomposition (Dec-C) and net N mineralization (Net Min-N) were determined according to the production of CO2 and NH4 + + NO3 – by aerobic incubation and CO2 + CH4 and NH4 + by anaerobic incubation, respectively. The results reveal that 40 years after change from rice paddy to orchard and wetland, the SOC and TN contents in the top-layer were not significantly altered. However, in buckwheat upland fields and in the parking area where vegetation was absent, the SOC content decreased significantly. Conversion of rice paddies to amur silver grass wetland altered the soil δ13C the most, leading to an increase of 5.1‰ and 2.9‰ for the top – and sub-layers, respectively. In general, the incubation experiment results revealed that a change to orchard and wetland did not significantly decrease the Dec-C and Net Min-N. Whereas, the change from rice paddies to parking area significantly decreased the Dec-C and Net Min-N in both aerobic and anaerobic conditions. We conclude that LUMC over decades had various effects on the SOC and TN contents and stocks as well as their mineralization potentials.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"2013 1","pages":"114 - 123"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72768644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 mass water content of paddy soil after harvest is strongly associated with the accumulation of organic matter as the source of available nitrogen","authors":"Hideo Azuma, S. Takahashi, N. Kato, K. Inubushi","doi":"10.1080/00380768.2021.2022436","DOIUrl":"https://doi.org/10.1080/00380768.2021.2022436","url":null,"abstract":"ABSTRACT Paddy soils are the dominant source of nitrogen for rice via mineralization, and knowledge about the available nitrogen (AN) in paddy soil is important for rice cultivation. Although the relationship between AN and soil physicochemical parameters has been studied, no systematic studies of the relationships between AN and the soil moisture content of various soil types in Japan have been studied. Therefore, we examined the impacts of soil types and treatment of organic matter application or paddy–upland rotation on these relationships. We sampled topsoils from 30 paddy fields throughout Japan. We compared the relationships between AN and soil physicochemical properties, such as total nitrogen (TN), cation exchange capacity, soil water-holding capacity (WHC), mass water content after harvest (MWH), and water content after harvest (WCH). The scatter diagram revealed that AN and either MWH or WCH (p < 0.01) had the highest positive linear correlation coefficient; the pattern became clearer after separating Andosols and non-Andosols. We analyzed the relationship between AN and either TN or MWH in 100 topsoils, including soils from treatment plots with successive organic matter application or paddy-upland rotation. A significantly positive correlation between AN and TN was observed, although the regression slopes for volcanic or non-volcanic soils differed. The decrease in AN due to frequent paddy–upland rotation was greater than that for TN. On the other hand, a highly positive correlation between AN and MWH was observed, and the coefficient of determination was higher than that for AN and TN. TN and the WHC increased when the accumulation of organic matter in paddy soil was greater. As there was a positive correlation between WHC and MWH, a positive correlation was also observed between AN and MWH. Additionally, we investigated year-to-year variation in MWH using topsoil samples collected before autumn tillage, for 3–5 consecutive years in 24 plots, for various soil types throughout Japan. In order to eliminate the effects of precipitation and to minimize the fluctuation of MWH in paddy topsoil, it was desirable to collect topsoil samples within 24–96 hours of the last precipitation of 1 mm h−1 or more, for the measurement of moisture content.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"66 1","pages":"215 - 227"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77330236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preface to the special section ‘Soil C and N response to climate, land-use and management changes (Soil C, N and CLUMC)’","authors":"W. Cheng","doi":"10.1080/00380768.2022.2039985","DOIUrl":"https://doi.org/10.1080/00380768.2022.2039985","url":null,"abstract":"Rockstrom et al. (2009) proposed ‘Planetary Boundaries’ which is a concept involving Earth system processes that contain environmental boundaries. In the framework, nitrogen (N) cycle, rate of biodiversity loss and climate change have been transgressed by humanity already. In 2015, the United Nations (UN) established the global agenda for sustainable development until 2030 and defined it as Sustainable Development Goals (SDGs), including 17 specified goals with 169 targets. Many goals were related to land use and management changes (LUMC) with carbon (C) and N dynamics among atmospherebiosphere-pedosphere systems with agricultural activities, such as Zero Hunger (Goal 2), Climate Action (Goal 13), Life on Land (Goal 13) and so on (https://www.undp.org/sustainabledevelopment-goals). Soils could be C sinks or sources depending on climate, land use and management changes (CLUMC) in different plant-soil ecosystems. Soil N and its dynamics not only affect plant growth and crop production but also control soil C sequestration. Thus, C and N dynamics affected by CLUMC in terrestrial ecosystems contribute not only to global and local environmental problems, including global warming, destruction of the ozone layer, acid rain, and eutrophication, but also to changes in soil fertility and crop production related to human sustainable development (Cheng 2020). Many of our colleagues around the world are studying the C and N dynamics by CLUMC in different regions and countries with various ecosystems. We need to share our knowledge and learn from each other researches and discuss how to do the next studies for the UN-SDGs. Therefore, we have held the ‘International Symposium on C and N Dynamics by Land Use and Management Changes in East and Southeast Asian Countries’ on September 10–12, 2018 in Tsuruoka campus, Yamagata University, Japan, and published a special section in Soil Science and Plant Nutrition (SSPN) titled as ‘Soil carbon and nitrogen dynamics by land use and management changes in East and Southeast Asian countries (Soil C and N by LUMC).’ There were 20 papers in the special section, including 4 review papers and 16 original articles (Cheng 2020). Many papers in the special section have been cited many times during the last 2 years. Two years late, we planed the second international symposium for similar topics on September 28–30, 2020 in Tsuruoka, Japan again. Since the outbreaks of COVID-19 pandemic around the world from January 2020, we could not invite and receive guests from foreign countries. Therefore, we decided to hold an International Online Symposium (IOS) on Soil C and N Dynamics by Land Use, Management, and Climate Changes. In this virtual symposium, a total 56 of our colleagues in 14 countries around the world participated and presented their newest research results in this IOS (Figure 1). More than 80 young students in many universities have joined the IOS to learn the front knowledge in the world (Figure 2). The IOS also celebrated","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"2 1","pages":"1 - 4"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89193582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of biodegradable plastics on soil properties and greenhouse gas production","authors":"K. Inubushi, Yutaro Kakiuchi, Chiaki Suzuki, M. Sato, S. Ushiwata, M. Matsushima","doi":"10.1080/00380768.2021.2022437","DOIUrl":"https://doi.org/10.1080/00380768.2021.2022437","url":null,"abstract":"ABSTRACT Microplastics cause environmental problems. Biodegradable plastics have become popular because they aim to avoid such problems. However, their decomposition in the soil may have an impact. This study aims to investigate the effects of biodegradable plastics on the physicochemical properties of soil, specifically the production of CO2 and N2O in the soil and plant growth. Three kinds of biodegradable plastics in the forms of 1) nonwoven fabric sheets made of poly-lactic acid (PLA) and polybutylene-succinate (referred to hereafter as fabric), 2) laminate sheets made of polybutylene adipate terephthalate (PBAT) and pulp (hereafter laminate), and 3) drinking cups made of PLA (hereafter cup), were cut into small pieces (<5 mm), added to soil, then water-holding capacity was determined and incubated aerobically for 4 weeks at 30°C in the dark. Soil and gas samples were collected weekly to measure soil pH, nitrate-nitrogen content, CO2, and N2O productions. These plastics were also tested in a pot experiment with Komatsuna (Brassica napa var. perviridis). We tested for seed germination, plant growth, leaf color, and fresh weight at harvest. Results showed that the water retention capacity was higher in the fabric plastics as compared to the cup plastics and the control. Soil pH with the fabric plastics dropped during the initial 2 weeks of incubation, then recovered to a similar pH to the control (without plastic). Nitrate contents in the soil with laminate plastics were lower than those in the control, while CO2 production in the soil with the laminate plastics was higher than that in the control and the other plastics during the incubation period, and even higher than the one of added plastic-C. N2O was produced rapidly within 1 week of incubation in the soil with the laminate plastics, and cumulative N2O production from incubation was more than that of the control. The seed germination and plant growth tended to be suppressed in the pot experiment with the fabric and laminate plastics. The results indicate that the influence of these biodegradable plastics on soil properties, greenhouse gas production, and plant growth on the kind of plastic and the timing.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"106 1","pages":"183 - 188"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85994401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soil carbon stocks and main nutrients under cocoa plantations of different ages","authors":"A. Arthur, S. Acquaye, W. Cheng, J. A. Dogbatse, Sampson Konlan, O. Domfeh, A. Quaye","doi":"10.1080/00380768.2022.2029219","DOIUrl":"https://doi.org/10.1080/00380768.2022.2029219","url":null,"abstract":"ABSTRACT Soil organic carbon and main nutrient stocks play key roles in maintaining soil fertility and yields of agricultural crops including cocoa (Theobroma cacao). The amount of nutrients removed from the soil by the cocoa trees could be influenced by its physiological growth stage. A study was carried out to examine the changes in some soil physical and chemical properties with main nutrients availabilities under cocoa plantations at the Cocoa Research Institute in the Eastern Region of Ghana. Cocoa plantations of different ages (5, 10, 14, 18 and 23 years) were chosen based on similar land history. Soils at the study sites are classified as Xanthic Ferralsol (WRB series). On each plantation, one acre (0.4ha) plot was demarcated and divided into three blocks for soil sampling. Five core samples were taken at 0–15 cm depth per block, bulked together and subsample taken to the laboratory for analyses. Particle size analyses showed that all soils were of sandy loam texture. All soils were acidic with pH below 5.5, relatively low exchangeable K and Ca. Bulk density values varied with ages at highest in 18 years. Soils under 23 years old plantations had relatively lower bulk density than those of the other ages. Total nitrogen content under the 5, 10, and 18 years of cocoa plantations was below the critical values considered adequate for good cocoa growth. Soil carbon stock and available phosphorus content of the soil generally tend to increase with age of the cocoa plantations. These differential variations in the soil nutrients, namely, total N, available P, exchangeable K, Ca, and Mg among five different cocoa plantation ages suggest that total nitrogen, available P, and exchangeable Mg were higher than the critical levels for good cocoa growth under 23 years of cocoa plantations only, but exchangeable K and Ca were lower the critical levels for all ages of cocoa plantations.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"61 1","pages":"99 - 103"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84558801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Equivalent incorporation of Chinese milk vetch and rice straw enhanced nutrient mineralization and reduced greenhouse gas emissions","authors":"Yahya Mohammed Aljerib, M. Geng, Peidong Xu, Donghui Li, M. S. Rana, Qiang Zhu","doi":"10.1080/00380768.2022.2032334","DOIUrl":"https://doi.org/10.1080/00380768.2022.2032334","url":null,"abstract":"ABSTRACT Incorporation of crop residues into the soil provides essential nutrients and increases carbon stocks, which also increases greenhouse gas emissions from the soil. The present study was conducted to determine the effect of co-incorporation of Chinese milk vetch (CMV) and rice straw (RS) at different mixing rations on the dynamics of nutrient mineralization and the emissions of CO2 and CH4. The Fluvo-aquic paddy soil was collected and mixed with crop residues at 20 g kg−1 soil and incubated for 187 days. The CMV and RS were incorporated with the ratios of 100%:0% (M100), 75%:25% (M75S25), 50%:50% (M50S50), 25%:75% (M25S75), and 0%:100% (S100), respectively. Results showed soil total nitrogen (N) concentrations were higher with the higher proportion of CMV in the mixing residues. At 8 days of incubation (DOI), both soil available phosphorus (P) and potassium (K) concentrations were greater in treatments with the higher ratio of RS, but there were no significant differences among M75S25, M50S50, M25S75, and S100 at and after 37 DOI. The CO2 emission rate of M100 was significantly higher than that of other treatments at 8 and 12 DOI. Even though the CH4 emission rate of M50S50 was significantly higher than that of other treatments at 8 DOI, S100 resulted in the significantly higher cumulative production of CH4 after 22 DOI. Predicted from the exponential regression models, S100 had the highest CO2-C and CH4-C mineralization potentials. Additionally, the M50S50 treatment resulted in 3.7%-54.7% higher microbial biomass carbon (MBC) concentration than other treatments at the end of the incubation. In summary, the mixing ratio of 1:1 was recommended for the co-incorporation of CMV and RS by considering both the nutrients availability and the greenhouse gas emissions.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"1 1","pages":"167 - 174"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80326391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Abstracts of Nippon Dojo-Hiryogaku Zasshi 92-6","authors":"","doi":"10.1080/00380768.2022.2042769","DOIUrl":"https://doi.org/10.1080/00380768.2022.2042769","url":null,"abstract":"","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"116 1","pages":"238 - 239"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77267074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Organic farming enhances soil carbon and nitrogen dynamics in oil palm crops from Southeast Amazon","authors":"S. Mardegan, A. D. de Castro, S. S. F. Chaves, Richardson Sandro dos Santos Freitas, Manoela Sena Avelar, F. S. O. Filho","doi":"10.1080/00380768.2022.2031285","DOIUrl":"https://doi.org/10.1080/00380768.2022.2031285","url":null,"abstract":"ABSTRACT The expansion of oil palm (Elaeis guineensis Jacq, Arecaceae) crops threatens tropical rainforests. It negatively impacts a series of ecosystem services and functions, including carbon (C) sequestration and dynamics, as well as nutrient cycling. Such negative impacts have pressured companies to adopt conservationist practices in palm oil production. And yet the conversion from conventional to organic farming has gained space in the last decade, studies assessing the effects of organic oil palm crops on ecosystem functioning are still scarce. Here, we assessed how alternative farming practices affect organic matter dynamics in oil palm crops. We compared oil palm crops under conventional (CP) and organic (OP) farming in Southeast Amazon. We also sampled lowland dense ombrophilous forest (floresta densa de terra firme, FT) as reference. Soils were sampled at 0–10, 10–20, and 20–30 cm depth intervals to determine soil physical–chemical properties and C and nitrogen (N) concentrations and stocks. The highest soil C and N concentrations were found at 0–10 cm interval in CP and OP. We detected no variation in soil C and N stocks within depth intervals in FT and CP, while OP had higher soil C and N stocks at the 0–10 cm interval. When comparing OP and CP crops, soil C concentrations and stocks did not vary within zones or depth intervals. All OP zones had higher soil N concentrations and stocks than their conventional counterparts, and we found a variation within depth intervals. Our results show that organic farming has positively influenced organic matter dynamics. Organic oil palm crops preserved and even increased C and N sequestration.","PeriodicalId":21852,"journal":{"name":"Soil Science and Plant Nutrition","volume":"7 1","pages":"104 - 113"},"PeriodicalIF":2.0,"publicationDate":"2022-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90849710","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}