Proceedings - Soil Science Society of America最新文献_第9页

Optimizing cadmium phytoremediation with phytohormone combinations 植物激素联合修复镉的优化研究

Proceedings - Soil Science Society of America Pub Date : 2025-04-15 DOI: 10.1002/saj2.70051

Lanlan Xu, Xincheng Li, Mingyue Xiong, Lanlan Qi, Xiaole Zhang, Xitong Li, Meng Lu, Hongchuan Song, Huilin Guan, Yizong Huang, Jinming Hu, Jingxin Huang

{"title":"Optimizing cadmium phytoremediation with phytohormone combinations","authors":"Lanlan Xu, Xincheng Li, Mingyue Xiong, Lanlan Qi, Xiaole Zhang, Xitong Li, Meng Lu, Hongchuan Song, Huilin Guan, Yizong Huang, Jinming Hu, Jingxin Huang","doi":"10.1002/saj2.70051","DOIUrl":"10.1002/saj2.70051","url":null,"abstract":"Heavy metal contamination, particularly cadmium (Cd), poses a significant global environmental threat. Phytoremediation, which utilizes plants for heavy metal removal, offers a sustainable remediation strategy. However, its efficiency is often limited by plant growth and metal uptake capacity. This study investigates whether combined applications of indole-3-acetic acid (IAA), brassinosteroid (BR), and kinetin (KT) can enhance Cd phytoremediation in Bidens pilosa, a known Cd-hyperaccumulator. A pot experiment was conducted using a completely randomized design with nine treatments, including individual and combined hormone applications under controlled high Cd stress (40 mg/kg). Here, we show that a combined IAA + BR treatment synergistically increased the Cd bioconcentration factor by 1.41-fold compared to the control. This was accompanied by enhanced biomass, photosynthetic activity, and antioxidant enzyme activity (catalase [CAT] and peroxidase [POD]). The triple combination (IAA + KT + BR) synergistically increased the translocation factor by 1.38-fold, indicating enhanced Cd movement to shoots, while other combinations exhibited additive or antagonistic effects on Cd accumulation, specifically in leaf and root tissues. Individual hormone applications generally maintained photosynthetic efficiency, whereas combinations often reduced it. These findings demonstrate that tailored phytohormone combinations can significantly enhance Cd phytoremediation efficacy in B. pilosa through modulation of key physiological responses. By optimizing plant growth and Cd partitioning, this hormone application approach offers an effective strategy for remediating Cd-contaminated soils. Further research should focus on addressing cost limitations, particularly for BR, and evaluating the long-term efficacy and ecological impacts of phytohormone treatments under field conditions.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143836084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A physically based model for the entire soil water retention curve 整个土壤保水曲线的物理模型

Proceedings - Soil Science Society of America Pub Date : 2025-04-15 DOI: 10.1002/saj2.70054

Andrey Smagin

{"title":"A physically based model for the entire soil water retention curve","authors":"Andrey Smagin","doi":"10.1002/saj2.70054","DOIUrl":"10.1002/saj2.70054","url":null,"abstract":"An adequate description of the water retention curve (WRC) is an urgent hydrophysical problem in connection with computer modeling of water and solutes transport in soils and landscapes. The study presents a physically based thermodynamic model for describing soil water retention in the complete moisture range from saturation to oven drying. Unlike well-known empirical analogues, the new model is obtained on the basis of the equations of capillarity and disjoining water pressure as the main mechanisms of soil water retention, along with their limitations by porosity, the maximum height of capillary rise, and the standard soil water potential at a conditionally zero water content (the oven dryness state). Validation of the model using the author's own and literature WRC data for soils with various textures from sands to clays confirmed its good approximation ability with R2 = 0.984–0.999 and normalized root mean squared errors 2–20 times lower than in the commonly used van Genuchten model with the same number of parameters. In addition to describing the WRC with calculating pore size distribution, the new model estimates the generalized Hamaker constant for molecular interfacial interactions and the specific soil surface area alternatively to the standard Brunauer–Emmett–Teller (BET) method.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143836246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Response of soil basal respiration rates, microbial attributes, and organic matter composition to land-use change 土壤基础呼吸速率、微生物属性和有机质组成对土地利用变化的响应

Proceedings - Soil Science Society of America Pub Date : 2025-04-14 DOI: 10.1002/saj2.70052

Ming Gao, Wei Hu, Meng Li, Mingming Guo, Yongsheng Yang

{"title":"Response of soil basal respiration rates, microbial attributes, and organic matter composition to land-use change","authors":"Ming Gao, Wei Hu, Meng Li, Mingming Guo, Yongsheng Yang","doi":"10.1002/saj2.70052","DOIUrl":"10.1002/saj2.70052","url":null,"abstract":"Land-use change directly impacts soil basal respiration (Br), soil microbial attributes, and soil organic matter (SOM) composition. However, the role of soil microbial attributes and SOM composition in influencing soil Br under land-use changes remains largely undetermined. We examined how interactions between soil physicochemical properties, SOM chemical structure, and microbial attributes regulate soil Br across three land-use types, cropland, forest, and grassland, in the Mollisol and Arenosol of Horqin Sandy Land. The results showed that soil Br, phospholipid fatty acid content, and the relative peak areas of aliphatic and aromatic compounds were significantly lower in cropland than in forest and grassland. Additionally, the Arenosol exhibited poorer soil properties compared to the Mollisol (p < 0.05). Soil Br in the Mollisol (3.60–5.56 mgCO2-C kg−1 h−1) was significantly higher than in the Arenosol (0.86–2.60 mgCO2-C kg−1 h−1, p < 0.05). G+/G− ratios and bacteria were identified as the main predictors of Br in the Mollisol and Arenosol, respectively. The structural equation model revealed that microbial attributes are the primary drivers of Br, influencing it indirectly through changes in SOM composition. Our findings are instrumental in understanding the role of microbial attributes in carbon turnover during land-use changes.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soil health responses to cover crop functional group and richness in semiarid Montana 蒙大拿州半干旱地区土壤健康对覆盖作物功能群和丰富度的响应

Proceedings - Soil Science Society of America Pub Date : 2025-04-12 DOI: 10.1002/saj2.70045

Clain A. Jones, Catherine A. Zabinski, Perry R. Miller, Kristen D'Agati, Susan M. Tallman, Megan L. Housman

{"title":"Soil health responses to cover crop functional group and richness in semiarid Montana","authors":"Clain A. Jones, Catherine A. Zabinski, Perry R. Miller, Kristen D'Agati, Susan M. Tallman, Megan L. Housman","doi":"10.1002/saj2.70045","DOIUrl":"10.1002/saj2.70045","url":null,"abstract":"Despite a plethora of studies on the effects of cover crops on soil health, few published papers have reported the effects of plant functional group and richness on soil health, especially in semiarid regions. We initiated a no-till study in semiarid Montana in 2012 that consisted of Pea (Pisum sativum L.), four two-spp single functional groups (Brassica, Fibrous-rooted, Legumes, and Tap-rooted), four three-functional group mixes, a four-functional group mix (Full), and a summer fallow control (Fallow). Cover crops were terminated with herbicide when pea was at first flower stage, and wheat (Triticum aestivum L.) was grown after each cover crop at three nitrogen (N) rates. After four cover crop cycles, soil in both Pea and Full had greater soil organic carbon (SOC), soil total nitrogen (STN), and potentially mineralizable nitrogen (PMN) than Fallow, but Pea, Full, and Fallow treatments did not differ in infiltration rate, penetration resistance, or soil enzyme activity. There were few differences in soil health parameters between Pea and Full, and among functional groups. Soil in the three-functional group treatments had 20%–35% greater PMN than in the one-functional group treatments (p < 0.05), yet SOC and STN were not affected by functional richness. Nitrogen rate did not affect SOC, STN, or PMN. Concentrations of SOC were weakly related (R2 = 0.05–0.14, p < 0.05) with 7-year aboveground biomass returned, suggesting practices that increase residue amounts might be more important to SOC and other soil health parameters than functional group or richness.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70045","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Field comparison of zero-valent iron nano- and microparticles for in situ metal immobilization in an acidic Ni–Cu-contaminated soil 零价铁纳米和微颗粒在酸性镍铜污染土壤中原位固定金属的现场比较

Proceedings - Soil Science Society of America Pub Date : 2025-04-10 DOI: 10.1002/saj2.70049

Elvira A. Dovletyarova, Marina V. Slukovskaya, Tatiana K. Ivanova, Anna A. Shirokaya, Alexander P. Zhikharev, Mikhail M. Karpukhin, Carolina Yáñez, Alexander Neaman

{"title":"Field comparison of zero-valent iron nano- and microparticles for in situ metal immobilization in an acidic Ni–Cu-contaminated soil","authors":"Elvira A. Dovletyarova, Marina V. Slukovskaya, Tatiana K. Ivanova, Anna A. Shirokaya, Alexander P. Zhikharev, Mikhail M. Karpukhin, Carolina Yáñez, Alexander Neaman","doi":"10.1002/saj2.70049","DOIUrl":"10.1002/saj2.70049","url":null,"abstract":"Zero-valent iron (ZVI) nanoparticles (<100 nm) have garnered significant interest for their potential in remediating metal-polluted soils. However, it remains unclear whether they offer demonstrable advantage over ZVI microparticles (e.g., iron powder or grit) for in situ metal immobilization. This field study compared the effectiveness of ZVI micro- and nanoparticles for immobilizing metals and promoting perennial ryegrass (Lolium perenne L.) growth in an acidic Podzol (pH 4.5) contaminated by a nickel–copper smelter. ZVI nanoparticles were applied as an iron–biochar composite synthesized via pyrolysis. Amendments were incorporated into the soil for 16 months under field conditions. Subsequently, soil samples were collected and used in a 21-day laboratory experiment, comparing ryegrass growth in amended and unamended soils. While ZVI nanoparticles were more effective than microparticles at immobilizing copper, neither treatment significantly reduced nickel concentrations in the soil solution. Consequently, neither ZVI amendment substantially improved ryegrass growth, likely due to persistent nickel phytotoxicity. The study provides a direct field comparison of ZVI micro- and nanoparticle efficacy for metal immobilization in contaminated soils.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Can fine sediment addition promote carbon stabilization in coastal wetland soils? A laboratory experiment 添加细沙能促进滨海湿地土壤碳稳定吗？实验室实验

Proceedings - Soil Science Society of America Pub Date : 2025-04-10 DOI: 10.1002/saj2.70044

Anthony J. Mirabito, Jason A. Anandappa, Nia R. Hurst, Jacob F. Berkowitz, Lisa G. Chambers

{"title":"Can fine sediment addition promote carbon stabilization in coastal wetland soils? A laboratory experiment","authors":"Anthony J. Mirabito, Jason A. Anandappa, Nia R. Hurst, Jacob F. Berkowitz, Lisa G. Chambers","doi":"10.1002/saj2.70044","DOIUrl":"10.1002/saj2.70044","url":null,"abstract":"Scientists are increasingly exploring soil carbon (C) stabilization processes that protect soil organic C from microbial decomposition. Mineral-associated organic matter (MAOM) is considered one of the most protected pools of soil C, but remains understudied in wetland soils relative to upland soils. Using complementary intact soil core and bottle incubation studies, this research investigated how fine sediment addition, in the form of dredged sediment, impacts soil respiration and MAOM pools in coastal wetland soils that vary by soil organic matter (SOM) content and particle size. We hypothesized fine sediment additions would reduce soil respiration and increase MAOM pools, with the greatest response to fine sediment addition being in the high SOM soil. Contrary to our prediction, addition of fine sediments to high SOM intact soil cores did not change respiration rate, but CO2 production rate decreased by 21% in low SOM cores, and the mass of MAOM-C increased by 23% after receiving fine sediment additions. In the bottle study of high SOM soils only, the response to fine sediment addition varied by initial soil particle size. Specifically, the largest soil particles (>2 mm) showed a 1727% increase in MAOM-C, which coincides with a 49% decrease in CH4 production rate. Overall, soil C protection resulting from fine sediment addition differed by soil type and SOM texture, suggesting initial soil properties (e.g., existing mineral sediment content, nutrient availability, and degree of decomposition) influence C stabilization through fine sediment addition, and these properties should be considered when choosing potential coastal restoration sites.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface-soil carbon and nitrogen mineralization under cropland, grassland, and woodland in Virginia 维吉尼亚州农田、草地和林地表层土壤碳氮矿化

Proceedings - Soil Science Society of America Pub Date : 2025-04-09 DOI: 10.1002/saj2.70050

Alan J. Franzluebbers

{"title":"Surface-soil carbon and nitrogen mineralization under cropland, grassland, and woodland in Virginia","authors":"Alan J. Franzluebbers","doi":"10.1002/saj2.70050","DOIUrl":"10.1002/saj2.70050","url":null,"abstract":"Long-term management of farmland can be expected to change the functioning of soil. Minimizing soil disturbance with conservation management is critical to changing surface organic matter conditions, but less is known of how canopy cover (e.g., plant species, residue quality, growth habit) may be affecting C and N properties and processes over time. A diversity of soils under different conservation land uses from 31 farms in the piedmont and mountain regions of Virginia (a warm-moist, temperate region) were sampled at 0- to 10-cm depth to assess soil C and N mineralization and associated properties. Interquartile range of surface residue N content was 76–143 kg ha−1 under cropland, 102–181 kg ha−1 under grassland, and 156–279 kg ha−1 under woodland. Median soil-test biological activity and basal soil respiration were 39 ± 7% greater under grassland and woodland than under cropland. Median potential N mineralization was 37 ± 6% greater under grassland than under cropland and woodland. Residual soil ammonium-N, despite relatively low concentrations, was strongly associated with biologically active soil C and N properties. Apparent nitrification during laboratory incubation (g NO3-N g−1 mineralized N) was high (>0.80) in all croplands, inhibited (≤0.80) in some grasslands (20% of soils), and dramatically inhibited in woodlands (85% of soils). The combination of high potential C and N mineralization and reduced nitrification may provide mechanisms for maintaining productivity while minimizing N losses to the environment in long-term conservation land uses.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel oilseed crops improved soil dry aggregate size distribution implying increased erosion resilience 新型油籽作物改善了土壤干团聚体粒径分布，提高了土壤抗侵蚀能力

Proceedings - Soil Science Society of America Pub Date : 2025-04-06 DOI: 10.1002/saj2.70046

Carrie Eberle, Sharon Weyers, Jane M. F. Johnson, Christina Helseth, Sharon Schneider, Russ Gesch

{"title":"Novel oilseed crops improved soil dry aggregate size distribution implying increased erosion resilience","authors":"Carrie Eberle, Sharon Weyers, Jane M. F. Johnson, Christina Helseth, Sharon Schneider, Russ Gesch","doi":"10.1002/saj2.70046","DOIUrl":"10.1002/saj2.70046","url":null,"abstract":"Adoption of oilseeds is expanding in the United States Corn Belt, but their influence on soil aggregation, an indicator for susceptibility to surface wind or water erosion, is scarce. Soil physical properties were measured in rotation treatments of two seasonally different rotation systems: (1) winter oilseeds versus winter fallow and (2) summer oilseeds versus corn (Zea mays L.). Soil was collected from the top 5 cm of both rotations in the fall, following soybean (Glycine max L.) harvest, and separated into six dry aggregate size distribution (DASD) fractions used to calculate the mean weight diameter (MWD), the wind erodible fraction (WEF; 0–1.0 mm aggregates), and the ability of aggregates to remain stable in water (ASW; 1–2 and 2-3-mm aggregates). Winter camelina (Camelina sativa L.) had a lower WEF (0.22 ± 0.029) compared to winter fallow (0.26 ± 0.029). Summer oilseed treatments had a significant influence on DASD with >50% of aggregates >2 mm in the summer oilseed treatments and >50% of aggregates >3 mm in the corn treatment. The corn–soybean, Calendula officinalis L.–soybean, and Brassica napas L.–soybean rotations did not differ significantly in MWD (3.59, 3.44, and 3.45, respectively) or WEF (0.20, 0.12, and 0.22, respectively) but had lower MWD and WEF than the Cuphea viscosissima Jacq. × Cuphea lancelota W.T. Aiton-soybean, Echium plantagineaum L.--soybean, and soybean–soybean rotations (MWD: 3.19, 3.23, and 3.22 and WEF: 0.28, 0.26, and 0.25, respectively). Neither winter nor summer oilseeds altered ASW. Nevertheless, MWD and WEF shifts indicate that oilseed crops improved soil aggregation and soil susceptibility to erosive forces of wind.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Organic matter characteristics and mineralization in ironstone gravel from two Plinthic soils in the Coastal Plain of Georgia 格鲁吉亚沿海平原两种底栖土壤中铁石砾石有机质特征及成矿作用

Proceedings - Soil Science Society of America Pub Date : 2025-04-06 DOI: 10.1002/saj2.70047

Oliva Pisani, Sabrina A. Klick, Timothy C. Strickland

{"title":"Organic matter characteristics and mineralization in ironstone gravel from two Plinthic soils in the Coastal Plain of Georgia","authors":"Oliva Pisani, Sabrina A. Klick, Timothy C. Strickland","doi":"10.1002/saj2.70047","DOIUrl":"10.1002/saj2.70047","url":null,"abstract":"Agricultural soils can contain a significant proportion of rock fragments, but most routine procedures for the estimation of soil carbon (C) and nitrogen (N) stocks promote the exclusion of the >2 mm component. This fractioning eliminates ironstone gravel, which is a common but poorly understood rock fragment found in Plinthic soils. Thus, the purpose of this experiment was to study the role of ironstone gravel on soil C and N dynamics in two Plinthic soils of the southern Coastal Plain of Georgia. Specifically, the objective of this study was to conduct an incubation experiment using ground and unground ironstone gravel to (1) evaluate their C and N mineralization potential, (2) quantify and characterize the dissolved organic matter (DOM) generated from them, and (3) quantify their greenhouse gas evolution potential. Results from this incubation experiment revealed that ironstone gravel can contain 1%–5% of potentially mineralizable C and N, and that both ground and unground gravel can generate CO2 and N2O. The DOM released upon grinding the gravel is relatively fresh and of microbial origin. Thus, ironstone gravel is a chemically and biologically active component of Plinthic soils in the southern Coastal Plain. Disregard of the gravel fraction in soils where ironstone is present may result in an underestimation of the soil total C and N, which has implications for the accounting of C in agricultural soils and for the development of strategies to sequester soil C.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70047","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143787056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of tissue phosphorus concentrations as diagnostic tool for phosphorus nutrition in corn 组织磷浓度作为玉米磷营养诊断工具的评价

Proceedings - Soil Science Society of America Pub Date : 2025-03-31 DOI: 10.1002/saj2.70031

Gustavo A. Roa, Dorivar A. Ruiz Diaz

{"title":"Evaluation of tissue phosphorus concentrations as diagnostic tool for phosphorus nutrition in corn","authors":"Gustavo A. Roa, Dorivar A. Ruiz Diaz","doi":"10.1002/saj2.70031","DOIUrl":"10.1002/saj2.70031","url":null,"abstract":"Phosphorus (P) management in corn (Zea mays L.) traditionally relies on soil testing, but other diagnostic tools, such as tissue analysis, can be used to assess nutrient management. This study aimed to evaluate plant tissue analysis, Normalized Difference Vegetation Index (NDVI), and Soil Plant Analysis Development (SPAD) readings as diagnostic tools and identify the critical P tissue concentration (CPTC) in two different growth stages of corn in relation to response to P fertilizer. Field experiments were conducted at 30 site-years in Kansas. Fertilizer treatments included four different phosphorus rates and a control. Whole plant tissue samples and NDVI were collected at the V6 growth stage, and ear leaf samples and SPAD were collected at the R1 growth stage. The CPTC was determined using linear plateau and quadratic plateau models, and model averaging was performed for final estimation. Results indicated that the average CPTC in the whole plant at V6 and the ear leaf at R1 were 5.5 and 3.3 g kg−1, respectively. Regression analysis revealed that as the P tissue concentration increases, the optimum fertilizer recommendation rate decreases with R2 of 0.26 and 0.25 for V6 and R1, respectively. Correlation analysis highlighted that NDVI and SPAD correlation displayed some potential for assessing P in corn. Correlation and regression analysis showed a moderate correlation between plant P tissue concentration at V6 and leaf P tissue concentration at R1 (r = 0.50 and R2 = 0.25). This study contributes valuable insights for phosphorus management in corn, providing CPTC and fertilizer calibration and highlighting diagnostic tools’ shortcomings and potential.","PeriodicalId":101043,"journal":{"name":"Proceedings - Soil Science Society of America","volume":"89 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/saj2.70031","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143741627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0