基于GIS与地统计学土壤养分空间变异特征研究——以辽宁省凌源市6乡镇为例

以辽宁省凌源市西南部6乡镇为研究对象,利用GPS定位采集了1 042个土壤表层样.采用传统统计学和地统计学相结合的方法,研究了土壤养分的空间变异特征.结果表明,土壤养分的变异系数为29.45%～67.25%,变异强度是有效磷>碱解氮>有机质>速效钾.有机质、碱解氮和速效钾的C0/(C0+C)比值均在49.7%～49.90%之间,都具有中等的相关性,而有效磷的C0/(C0+C)的比值为100%,空间的相关性较弱.分维数D大小顺序为:有效磷>碱解氮>速效钾>有机质.Kriging插值分析表明,研究区土壤养分的空间分布格局主要受土地利用类型影响较大.     

砂姜黑土区花生田种植前后土壤肥力空间变异特征分析及评价

为明确砂姜黑土区花生种植前和成熟期土壤肥力状况及空间变异特征,本研究利用地理信息系统(GIS)和地统计学技术,运用模糊隶属度函数法,对河南省正阳县砂姜黑土土壤肥力状况及其空间变异特征进行分析。结果表明,与种植前相比,花生成熟期土壤有效硫含量明显下降,有机质、全氮、速效钾、有效铁和有效锌含量均有不同程度的提高,其中土壤全氮和有效磷含量增幅较大,分别增加10.17%和16.37%,但有机质和有效锌含量仍处于较低水平。花生种植前和成熟期土壤pH值变异系数分别为6.18%和6.36%,属弱变异,其余土壤养分指标变异系数介于12.58%~44.94%之间,属中等变异。不同土壤肥力指标对土壤肥力综合指标(IFI)的贡献存在差异,其中有机质含量对土壤肥力的贡献最大。半方差分析结果表明,花生种植前IFI的空间相关性较强,变异函数以球状模型拟合效果最好,空间分布特征主要受自然因素影响;花生成熟期IFI的空间相关性中等,变异函数以高斯模型拟合效果最好,空间分布特征受自然因素和人为活动共同影响。正阳县IFI多集中在0.58~0.72之间,表明土壤肥力整体处于中等偏上水平。另外,花生种植前IFI低于花生成熟期,且IFI空间分布呈南高北低的特征。综合分析,在正阳县砂姜黑土区花生生产上,应适当减少氮磷用量,增加有机肥和锌肥的施用,尤其是其南部地区。本研究结果可为砂姜黑土区花生优质高产的合理施肥和培肥地力提供科学指导。     

东北黑土地区主要土壤肥力质量指标的空间变异性

采用地理信息系统(G IS)和地统计学相结合的方法研究了本世纪初东北黑土区土壤表层(0~20 cm)pH、有机质、速效磷、速效钾、粘粒这5种土壤肥力指标的空间变异性。结果表明:土壤pH和粘粒的理论模型均为指数模型;有机质、速效磷和速效钾的理论模型均为球状模型。速效磷、速效钾的C0/(C0+C)较大,为46.63%和49.91%,说明这2种肥力指标具有中等的空间相关性;而pH、有机质、粘粒的C0/(C0+C)分别为10.80%、16.57%、12.88%,说明这3种肥力指标具有较强的空间相关性。根据每个采样点的指标数据计算出该地区土壤肥力质量综合评价指数,最终得到研究区土壤肥力质量的分布图。     

重庆市丰都县紫色土养分空间变异及土壤肥力评价

综合运用地统计学、GIS和模糊数学相结合的方法,分析了丰都县紫色土养分的空间变异规律,对其土壤肥力进行综合评价,并绘制了养分空间分布图和土壤综合肥力指数空间分布图,为该县紫色土养分分区管理及精准施肥决策等提供理论依据。结果表明:研究区内5种肥力指标中,除有效磷属于强变异性外,pH、有机质、碱解氮和速效钾均具有中等变异性。土壤pH、速效钾的最适模型是指数模型,块金值与基台值之比分别为17.07%和10.65%,有较强的空间相关性;用线性模型可较好地模拟有机质、碱解氮和有效磷,块金值与基台值之比分别为76.37%、84.21%和87.92%,空间相关性较弱。土壤pH、有机质、碱解氮、有效磷和速效钾的变程分别为5.43、28.02、31.24、36.48和2.28 km。土壤pH在长江以北较高与较低区域都呈带状并相间分布,在长江以南呈西低东高状态;有机质、碱解氮、有效磷及速效钾的分布存在明显的方向不均匀性,都呈零星斑状。丰都县土壤肥力质量呈现北低南高的趋势,5个等级地块分别占8.14%、18.86%、31.75%、28.58%、12.67%。丰都县土壤肥力总体水平中等偏上,这主要与该地区地形地质有关,同时也受到社会经济与人为管理措施的影响。     

曲靖植烟土壤pH和主要养分空间变异特征及其影响因素

2017—2020年用GPS定位采集云南省曲靖市9个县区核心烟田耕层（0~20 cm）土壤样品6 685个，测定pH、有机质、水解性氮、有效磷和速效钾，运用地统计学和地理信息系统（GIS）分析上述指标的空间分布特征及其变异主控因素。结果表明：土壤pH、有机质、水解性氮、有效磷和速效钾变幅分别介于4.16~8.50、2.23~99.93 g/kg、14.88~393.36 mg/kg、2.45~142.78 mg/kg和19.65~991.33 mg/kg，均值分别为6.30、32.83 g/kg、125.42 mg/kg、29.92 mg/kg和270.38 mg/kg，变异系数分别为11.59%、33.54%、29.93%、64.54%和35.18%，均为中等程度变异。pH集中在微酸至中性，较适宜烤烟种植，有机质、有效磷和速效钾含量集中在中等至极高等级，共占研究区总面积的70%以上。半方差分析表明，土壤pH空间自相关性较强，变异受自然因素（土壤类型、质地和降雨）的主导；有机质、水解性氮和速效钾空间自相关性中等，变异受自然和人为因素（施肥）共同影响；有效磷的空间自相关性很弱，人为因素是造成其空间差异的主控因素。克里格空间插值结果揭示土壤pH空间连续性好，整体呈聚集分布，强酸和极强酸土壤主要分布在马龙、宣威和会泽；有机质、水解性氮、有效磷、速效钾呈不规则的块状分布，随机性较强，其中有机质、水解性氮、速效钾的高值区主要在富源、罗平，有效磷较高的区域集中在陆良、罗平。     

40年来宁乡市稻田土壤肥力时空变异分析

土壤养分具有较强的时空变异性，明确 40年来县域稻田土壤肥力时空变异特征，能为稻田土壤培肥管理提供科学指导。通过收集整理宁乡市第二次土壤普查及 2018年稻田土壤肥力数据，以地统计学为基础，借助GS+7.0、ArcGIS和 R等软件进行分析。结果表明，40年来稻田土壤有机质、全氮、碱解氮、有效磷、速效钾及综合肥力指数分别增加13.1%、98.5%、20.1%、98.2%、13.7%和47.9%，但 pH降低0.58，土壤呈酸化趋势；土壤有效磷空间相关性较弱，受随机因素影响较大；有机质、全氮、碱解氮、速效钾、pH和综合肥力指数空间相关性较强，受地形和人为因素的共同作用；有机质、全氮和碱解氮是土壤综合肥力指数的重要因素，全氮的大幅增加是土壤综合肥力指数提升的关键驱动原因；当前水稻产量与土壤综合肥力指数呈极显著正相关。     

基于GIS的库车县耕层土壤养分空间变异研究

基于GIS和地统计学分析方法,对库车县耕层土壤(0—20cm)养分元素的空间变异特征进行了研究。结果表明:有机质、全氮、碱解氮、有效磷和速效钾均为中等程度的空间变异性,变异系数为19.11%~65.34%。有机质和全氮的理论模型符合球状模型,碱解氮、有效磷和速效钾的理论模型符合指数模型。有机质、全氮、碱解氮、有效磷和速效钾具有中等程度的空间自相关性,其空间变异主要受土壤类型、土壤质地以及施肥影响。从空间分布格局来看,有机质、全氮、碱解氮和速效钾的含量在东南方向上呈现明显的片状和斑块状分布,并由东南向西北发生递减,而有效磷主要呈斑块状分布,其含量在西南方向高于东北方向,研究区耕层土壤养分总体呈现出东南方向含量高于西北方向。     

胜利矿区土壤养分空间变异特征与影响因素

研究矿区土壤养分空间变异特征对矿区土地复垦与生态保护具有重要意义。选取胜利矿区土壤作为研究对象，基于地统计学和GIS技术分析土壤养分的空间变异性，并探讨地形因子和土地利用类型对其影响。结果表明：研究区土壤pH、有机质、速效氮、速效磷、速效钾平均含量分别为8.073、21.588g/kg、82.914mg/kg、8.210 mg/kg、257.341 mg/kg。除pH属于弱变异外，其他养分均属于中等强度变异。各项养分指标均具有一定的趋势效应。pH的最适模型是球面模型，有机质、速效钾的最适模型是线性有基台模型，速效氮、速效磷的最佳拟合模型是指数模型。pH、有机质、速效氮表现为中等空间相关性；速效磷、速效钾呈弱空间自相关。pH值由中部向四周逐渐降低；有机质、速效氮高值区集中在西部高程较大的位置，低值区分布在受人类扰动较强的中东部；速效磷、速效钾没有呈现一定的分布规律。坡度、坡向、高程、地形湿度指数是造成土壤养分格局差异的主要地形因子；从土地利用方式看，采矿扰动是养分含量较低的重要原因，矿业用地养分含量显著低于耕地和草地。     

近30年扬州市耕地土壤肥力变异特征及其驱动因素分析

  【目的】   揭示耕地土壤肥力变异特征及其影响因素，以指导长江中下游粮食主产区农业生产与耕地保育。   【方法】   江苏省扬州市是长江中下游粮食主产区的典型区域，选取扬州市1984年与2014年土壤pH、全氮、有效磷、速效钾和有机质作为土壤综合肥力评价指标，采用内梅罗指数法计算土壤综合肥力指数，采用GIS和地统计学相结合的方法，确定各项肥力指标和综合肥力指数的时空变异特征和分布格局，通过回归分析探究土壤肥力差异的主控因素。   【结果】   1) 30年间 (1984—2014年) 长江中下游粮食主产区耕层土壤有机质、全氮和有效磷含量分别增加了6.01 g/kg、0.33 g/kg和21.21 mg/kg，速效钾含量降低了9 mg/kg，土壤pH降低了0.77。土壤有机质、全氮、有效磷和速效钾含量呈中等变异性，土壤pH呈弱变异性；2) 30年间耕地土壤肥力指数增加0.31，年度间稳定，呈中等变异性和中等空间自相关性，耕地土壤肥力水平上升明显。耕地土壤肥力等级1984年以Ⅲ级为主、占总耕地面积的73.27%，2014年以Ⅱ级为主、占比76.20%；3) 成土母质、土类、亚类、土壤质地、土地利用方式对长江中下游粮食主产区耕地土壤肥力变异达到极显著影响 (P < 0.01)。1984年和2014年土地利用方式能够独立解释53.9%和58.0%的耕地肥力演变差异，是长江中下游粮食主产区30年耕地土壤肥力变异最主要影响因素。   【结论】   长江中下游粮食主产区耕地土壤肥力总的呈增加趋势，肥力等级由1984年的以Ⅲ级为主，提升到2014年的以Ⅱ级为主。土地利用方式是长江中下游粮食主产区 (扬州市) 30年间耕地土壤肥力变异的最主要驱动因素。     

曲靖市坡耕地土壤养分的空间变异性及其与利用方式的关系

以云南省曲靖市麒麟区越州镇面积为1 km2的典型性坡耕地为研究区,应用常规统计学方法和地统计学方法,对土壤的全氮、全磷、全钾、碱解氮、速效磷、速效钾、pH和有机质的空间变异规律进行分析,探讨了土地利用方式与土壤养分变异的关系。结果表明:研究区土壤养分空间变异程度以pH值最小,速效磷最大。速效养分、有机质和pH受人为活动影响明显,它们的空间自相关性中等或较弱。有机质、全磷、全钾、碱解氮、速效磷和速效钾等主要养分呈现出西北-东南方向逐渐增高的空间格局,与海拔和地形走势有明显相关性。不同坡位(坡位高低)间的土壤养分差异显著,有机质、全磷、全钾、碱解氮、速效磷和速效钾等养分指标呈现随坡位下降而升高的趋势。土地利用方式对土壤养分含量空间变异性也有明显的影响,施肥强度大的水田土壤养分含量最高,其次为施肥中等的旱地,土壤养分最低的是施肥量小或不施肥的果林和桉树林。     

“绿色革命”以来大气CO2浓度升高对C3作物营养品质的影响

自20世纪60年代"绿色革命"以来,育种技术和农耕技术的发展促进了农作物产量的大幅提升,然而作物的营养品质出现下降趋势。在相似的遗传背景下,大气CO_2浓度升高会使单位体积农作物产品的营养元素含量下降,因此"绿色革命"至今,农作物产品的营养元素下降可能受大气CO_2浓度升高影响。通过植物生长箱模拟"绿色革命"初期和目前的大气CO_2浓度水平(310μmol/mol和400μmol/mol),针对主要C_3作物水稻、小麦和大豆,研究"绿色革命"以来大气CO_2浓度升高对其籽粒的C、N、Fe、Zn元素含量的影响,结果表明:CO_2浓度升高对3种作物籽粒的C元素含量几乎没有影响,变化幅度在±1.5%之间;籽粒的N、Fe、Zn元素含量普遍呈现下降趋势,但均未达到显著水平。     

Potential of wild species for genetic enhancement of some semi-arid food crops

Discovery and incorporation of genes from wild species provide means to sustain crop improvement, particularly when levels of resistance in the cultigens are low and virulent strains of pests and pathogens overcome the host plant resistance. The extent of utilization and the potential of the wild genepool for genetic enhancement were reviewed in five important food crops viz. sorghum, pearl millet, chickpea, pigeonpea and groundnut grown in the semi-arid tropics. Introgression from compatible wild germplasm in the primary gene pool resulted in transfer of new cytoplasmic male sterility systems in pearl millet and pigeonpea, development of high protein, cleistogamous flower and dwarf pigeonpea lines and foliar disease resistant groundnut cultivars. Utilization of wild species in secondary and tertiary gene pools has been generally limited due to sterility, restricted recombination or cross incompatibility. Nevertheless, these species are extremely important as they contain high levels of resistance to several important biotic and abiotic stresses. Several of them, like those belonging to the Parasorghum section and the rhizomatous Arachis species are sources of multiple resistances and hold great promise to sustain crop productivity.     

Faculty positions:Center for Agricultural Resources Research,Chinese Academy of Sciences

正The Center for Agricultural Resources Research(CARR),the Institute of Genetics and Developmental Biology(IGDB),Chinese Academy of Sciences,invites applicants for several research group leader positions.CARR is one of the research organizations in Chinese Academy of Sciences(CAS).We seek nominations and applications     

Soil-profile distribution of primary and secondary plant-available nutrients under conventional and no tillage

Nutrient distributions under no tillage (NT) compared with conventional disk-and-bed tillage (CT) management in the warm, humid region of the southeastern USA need to be assessed so that future placement, quantity, and type of fertilizers can be altered, if necessary, to efficiently match crop demands. We determined soil-profile distributions of pH, N, P, S, K, Ca, Mg, Na, Zn, Fe, Mn, and Cu to a depth of 0.9 m at the end of 8.5 years of continuous CT and NT management on a Weswood silty clay loam (fine, mixed, thermic Fluventic Ustochrept) in southcentral Texas. Most dramatic changes occurred within the 0–0.05 m depth, where soil under NT had lower pH, Fe, and Cu than under CT, but greater P, K, Zn, and Mn. Greater P and K under NT than under CT also occurred below the till-zone (0.15–0.3 m). At a depth of 0–0.3 m, soil under NT contained greater amounts of extractable P, K, Zn, Fe, Mn, and Cu than under CT. Nitrogen fertilization had little effect on nutrient distributions, except resulting in greater extractable K at 0–0.05 m and greater nitrate at 0–0.15 m. Few changes in soil-profile distributions were observed for extractable S, Ca, Mg, and Na. Long-term continuous use of NT on this fine-textured, high-fertility (except for N) soil had no apparent adverse effects on nutrient distributions relative to CT, but enhanced conservation and availability of P, K, Zn, Fe, Mn, and Cu near the soil surface where crop roots proliferate.     

Assessing the effectiveness of conservation measures: Resolving the “wicked” problem of the Steller sea lion

“Wicked” problems are those that are complex and that change when solutions are applied. Many conflicts in conservation fall into this category. The study approached the problem of how to constrain the apparent wickedness of a problem in the conservation management of a species by using simple empirical indicators to carry out iterative assessment of the risk to a population and to document how this risk evolves in relation to the addition of new data and the implementation of management actions. Effects of high levels of uncertainty within data and also concerning population structure were examined through stochastic simulation and by exploration of scenarios. Historical trends in the example used, the Steller sea lion, showed rapid declines in abundance in some regions during the 1980s. The current total population is 130,000-150,000 Steller sea lions through Alaska and British Columbia and this number has been stable since about 1990 in spite of regional differences in population dynamics. Regional differences in the sequence of changes in the number of pups and non-pups, suggested that an internal re-distribution of juveniles could have happened between 1980 and 1990. Current productivity also appears close to the long-term mean. Stochastic population projection using various scenarios showed that, based upon this history, the risk of extinction for the population has declined and is below reasonable thresholds for considering the population to be endangered. The trends in risk suggest that management actions taken since 1990 have probably been effective. Consequently, the conservation management objectives for the Steller sea lion are probably being met. The approach provides a mechanism, based upon experience and scenario analysis, for exploring future policy options and may help to constrain the debate amongst stakeholders about the cost-benefit trade-offs associated with different options.     

Collection and preliminary evaluation of native turfgrass accessions in Italy

Despite a raising interest on turfs in Italy, all theavailable varieties of this kind in the Country are of foreign origin, and areoften poorly adapted to the prevailing climatic conditions. This prompted tobegin a collection activity of indigenous turfgrass species, with the ultimategoal of identifying promising materials for future breeding based on localgenetic resources. The collection was carried out in three areas of Italy, viz.the northern Po Plain, the coastal region of Liguria, and the island of Sardiniathat are characterised, respectively, by subcontinental, warm temperate, andtypical Mediterranean climate. Altogether, 141 sites were visited, yielding 226accessions belonging to eight species of potential interest for turfs:Poa pratensis, Poa trivialis,Festuca rubra, Festuca arundinacea,Lolium perenne, Agrostis stolonifera,Agrostis tenuis, and Cynodon dactylon,this last being a warm-season grass. Poa pratensis andCynodon dactylon were mostly collected in northern Italyand Sardinia, respectively, whereas Festuca arundinacea andLolium perenne were rather ubiquitous. The collection sitesranged from 0 to 1040 m asl, but sites over 750 m wereonly visited in the inner part of Sardinia. All the accessions, collected aswhole plants, were transplanted at Lodi, northern Italy, where they are beingevaluated. Their preliminary evaluation for traits of importance for turf use,such as sward colour and overall quality, highlighted the great variation andthe occurrence of interesting accessions in all species. Other characters wererecorded, bearing specific importance in individual species, and in all casespromising accessions were identified. The germplasm of Festucarubra, Festuca arundinacea, and Loliumperenne proved highly infected by endophytic (symbiotic) fungi of thegenus Neotyphodium.     

Enhanced establishment and growth of giant cardon cactus in an eroded field in the Sonoran Desert using native legume trees as nurse plants aided by plant growth-promoting microorganisms and compost

To evaluate the feasibility of long-term desert reforestation technology of mixed vegetation, cardon cactus (Pachycereus pringlei) seedlings from indoor and outdoor nurseries were planted in the field adjacent to one seedling of potential legume nurse trees: mesquite amargo (Prosopis articulata), yellow palo verde (Parkinsonia microphylla), and blue palo verde (Parkinsonia florida). Some of the planting holes were also supplemented with common dairy compost. Additionally, the combinations of legume tree–cactus were inoculated with either a consortium of desert arbuscular mycorrhizal (AM) fungi, plant growth promoting bacteria (PGPB; the diazotroph Azospirillum brasilense Cd, and the phosphate solubilizer Paenibacillus sp.), or a mixture of all. The field experiments were evaluated periodically during 30 months for survival and growth. Cardons reared in an outdoor screen house survived better in the field than those reared in a controlled growth chamber and hardened later outdoors. Association with any legume nurse tree increased survival and enhanced growth of untreated cardons. For cardons growing alone, application of either compost, AM fungi, and all the treatments combined increased survival. For these plants, no treatment affected plant growth during the first 3 months after transplanting. Later, all treatments, except for AM fungi, enhanced plant growth. However, only 2 years after transplanting the enhanced growth effect of AM fungi was also significant. In the presence of the legume nurse trees, transient positive effects on cardon growth were recorded. General evaluation after 30 months of cultivation showed that the treatments positively affected cardon growth when growing alone or in combination only with mesquite amargo but not with the other two legume trees. This study proposes that young legume trees have the capacity to enhance survival and growth of cardon cactus, depending on the legume cactus combination. Additional treatments such as compost or PGPB can either amplify the effect or else attenuate it.     

Karyotypic and genome size variation in Cajanus cajan (L.) Millsp. (pigeonpea) and some wild relatives

Detailed karyotypes and 4C DNA amounts have been studied in five cultivars of Cajanus cajan and 20 species belonging to Cajanus, Rhynchosia, Dunbaria, Flemingia and Paracalyx. C. cajan shows intraspecific variability and its karyotype is most similar to that of C. cajanifolius (sect. Cajanus) in the morphology and number of satellite chromosomes and the lack of any correlation between chromosome size within the complement and asymmetry. Karyotypes of C. lineatus and C. sericeus belonging to sect. Atylia are similar with respect to maximum r-index and the ratio of longest and shortest chromosomes in their respective complements. C. acutifolius (sect. Frutocosa) is distinct in having a very low ratio (1.44) between the longest and the shortest chromosomes, while in C. albicans, C. goensis, C. scarabaeoides (sect. Cantharospermum) there is no chromosome pair with r-index >2.0. C. mollis and C. volubilis (sect. Volubilis) show similarity with regard to ratio between the longest and the shortest chromosomes and a distinct chromosome pair with an arm ratio of 2.7 and C. platycarpus is distinct (sect. Rhynchosoides) in having the smallest ratio (1.36) between the longest and the shortest chromosomes. 4C DNA amounts in Cajanus and Rhynchosia vary between 3.28 pg to 11.69 pg and 4.92 pg to 11.13 pg respectively, while in Dunbaria, Flemingia and Paracalyx these vary between 4.70 and 7:06 pg. In the genus Cajanus karyotypic features and 4C DNA amounts agree with the sectional classification and bring out a close relationship between C. cajan and C. cajanifolius. This is supported by studies based on seed protein patterns, isozyme analysis, trypsin and chymotrypsin inhibitor patterns, RFLP and RAPD data and crossability relationships. A clear relation between DNA amount and abnormalities effecting the extent of pairing and recombination in interspecific hybrids shows the importance of this study in developing future breeding programme involving C. cajan and its wild relatives that are of potential value.     

Effect of some fungicide seed treatments on the survival of Bradyrhizobium japonicum and on the nodulation and yield of soybean [Glycine max. (L) Merr.]

Several commercial fungicide seed treatments were evaluated for their possible effect on the survival of Bradyrhizobium japonicum on seeds and on the nodulation and yield of soybeans in a greenhouse and a field experiment. quinolate Pro (carbendazim and oxine copper), Vitavax 200FF (carboxin and thiram), and Monceren (pencycuron) had a small effect or no effect on the survival of B. japonicum and on the nodulation and yield of soybeans. They can thus be considered compatible with soybean seed inoculation. Germipro UFB (carbendazim and iprodione), Apron 35J (metalaxyl), and Tachigaren (hymexazol) decreased B. japonicum survival and the nodulation and yield of soybeans and thus cannot be considered compatible with soybean seed inoculation.     

Leaf position and genotype differences for mineral element concentrations in sorghum grown on tropical acid soil 1

Mineral element deficiencies and toxicities are common problems associated with sorghum [Sorghum bicolor (L.) Moench] production on acid soils. To better understand some of the mineral element problems and the analysis of plant tissue of sorghum plants grown on acid soils, four sorghum genotypes were grown on an acid Oxisol at Carimagua, Colombia limed with dolomite at 2 and 6 Mg ha^‐1.

Samples for mineral element analyses were obtained from leaves at different positions on the four genotypes. Concentrations of P and Mg were highest in the flag leaf (Leaf No. 1) and decreased as the position on the plant declined from the top of the plant for plants grown at 2 Mg lime ha^‐1. Similar decreases in P, Mg, K, and Zn concentrations occurred in plants grown with 6 Mg lime ha^‐1. Concentrations of Ca, S, Si, Mn, Fe, Cu, and Al increased as leaf position declined from the flag leaf for plants grown at 2 and 6 Mg lime ha^‐1. The higher lime supply enhanced Ca and reduced Mn and Fe concentrations in leaves. Differences in mineral element concentrations for the four genotypes used were fairly extensive. The elements to show the greatest range among genotypes were Al and Si and the elements to show the least range among genotypes were P, K, and S. Care should be used in collecting leaf samples for plant analysis and genotypic differences for accumulation of mineral elements should be considered in interpretation of results.