Integrating high-value climbing fruit crops into tea (Camellia sinensis) systems offers potential to improve tea quality and diversify income, yet the density-dependent effects on both crops remain unquantified. This study evaluated tea intercropped with Siraitia grosvenorii (SG) and Passiflora edulis (PE) at three planting densities (low, medium, high), assessing tea leaf biochemical traits alongside fruit physical and intrinsic quality parameters. All intercropping treatments significantly increased tea leaf chlorophyll a, b, and total chlorophyll content compared with monoculture (CK), with maxima in PE-H (1.188, 0.447, and 1.635 mg/g) and SG-H (1.166, 0.425, and 1.591 mg/g), respectively. Tea polyphenol content decreased with increasing density, most notably in PE-H (−21.63% vs. CK), while free amino acids increased under SG-M (+20.50%) and PE-L (+19.10%). The polyphenol-to-amino acid ratio declined across treatments, with the largest reductions in PE-L (−24.36%) and SG-M (−19.62%). Water extract content rose in all intercropped systems, peaking in SG-H (+5.82%) and PE-H (+2.12%). For S. grosvenorii, SG-H achieved the highest single-fruit weight (94.37g), transverse diameter (54.56mm), proportion of medium/large fruits (94.58%), and sugar contents (reducing sugar 6.69%, total sugar 12.01%). For P. edulis, PE-H produced the highest soluble solids (17.82%), soluble sugars (12.27%), solid-acid ratio (6.72), and sugar-acid ratio (4.62), indicating superior flavor, whereas PE-M maximized titratable acids (2.74%) and peel thickness (5.16mm), and PE-L yielded the highest edible ratio (46.68%). This work provides density-resolved evidence that tea-climbing plant intercropping can simultaneously enhance tea leaf quality, and improve fruit sweetness and flavor profiles. Optimal densities vary by species, offering a dual-quality, agroecologically viable model for tea-based polyculture.

Tea (Camellia sinensis) is a globally cherished beverage, valued for its flavor and health benefits, largely attributed to bioactive compounds like polyphenols and amino acids. Selenium (Se), an essential trace element for humans and animals, plays a dual role in promoting plant growth and enhancing human health, yet its impact on tea quality remains underexplored. In this work, the effects of selenium application rate (with 0, 150, 225, and 300 g·ha−1 of Se) on soil selenium availability, enzyme activity, and the biochemical composition of spring tea, including chlorophyll, polyphenols, free amino acids, and polysaccharides, were studied. Results show that selenium application significantly increased soil selenium availability, with higher rates promoting its conversion into bioavailable forms. Soil enzyme activities, such as sucrase and urease, were notably influenced by selenium. In tea leaves, selenium content and glutathione peroxidase activity increased, while chlorophyll content initially rose but declined at higher application rates, with the Se225 treatment (225 g·ha−1 of Se) yielding optimal results. Selenium reduced polyphenol content, increased free amino acids, and lowered the phenol-to-amino acid ratio, improving tea sensory quality. Polysaccharide content also peaked at the Se225 treatment. These findings highlight the potential of selenium-enriched tea as a functional food and provide a scientific basis for optimizing selenium application in tea cultivation.

Selenium (Se) is one of the essential trace elements for humans. Plants are the main source of Se for humans, while soil Se is the primary source of Se for plants. Biofortification, which involves the transfer of Se from soil to plants and animals, is currently recognized as the safest and most effective approach for Se supplementation for humans. However, Se in soil primarily exists in forms that plants cannot easily utilize, so enhancing Se transfer from soil to plants is crucial for optimal Se utilization. In this paper, we provided a comprehensive analysis of Se forms in soil. Then we summarized the strategies for enhancing Se transfer from soil to plants. These strategies include adjusting redox potential, managing soil moisture, modulating pH value, improving organic matter, optimizing ion competition, promoting beneficial microbes, and considering the synergy between plant rhizosphere and soil. Furthermore, we reviewed Se forms and metabolism after uptake into plants to better understand its role in human health. Finally, we came up with the challenges and perspectives, to provide new insights for further study in this area. This work also offers potential solutions for enhancing Se transformation from soil to plants and utilizing soil Se to produce naturally Se-rich products.

Selenium (Se) is a crucial micronutrient for human health. Plants are the primary source of Se for humans. Selenium in the soil serves as the primary source of Se for plants. The soil contains high total Se content in large areas in Guangxi, China. However, the available Se is low, hindering Se uptake by plants. Microorganisms play a pivotal role in the activation of Se in the soil, thereby enhancing its uptake by plants. In this study, selenobacteria were isolated from Se-rich soils in Guangxi. Then two selenobacteria strains, YLB1-6 and YLB2-1, representing the highest (30,000 μg/mL) and lowest (10,000 μg/mL) Se tolerance levels among the Se-tolerant bacteria, were selected for subsequent analysis. Although the two selenobacteria exhibited distinct effects, they can significantly transform Se species, resulting in a decrease in the soil residual Se (RES-Se) content while concurrently increasing the available Se (AVA-Se) content. Selenobacteria also enhance the transformation of Se valencies, with a significant increase observed in soluble Se6+ (SOL-Se6+). Additionally, selenobacteria can elevate the pH of acidic soil. Selenobacteria also promote the uptake of Se into plants. After treatment with YLB1-6 and YLB2-1, the Se content in the aboveground part of Chinese flowering cabbage increased by 1.96 times and 1.77 times, respectively, while the Se accumulation in the aboveground part of the plant significantly increased by 104.36% and 81.69%, respectively, compared to the control. Further whole-genome sequencing revealed the genetic difference between the two selenobacteria. Additionally, 46 and 38 candidate genes related to selenium utilization were identified from YLB1-6 and YLB2-1, respectively. This work accelerates our understanding of the potential molecular mechanism of Se biofortification by selenobacteria. It also provides microorganisms and gene targets for improving crop varieties or microorganisms to exploit the rich Se source in soil.

增强作物对土壤硒的富集能力对于提高土壤硒的利用效率,优化富硒作物的生产具有重要意义.采用盆栽方法,设置对照组(CK)、50 μmol·L-1茉莉酸(JA50)、100μmol·L-1茉莉酸(JA100)、50μmol·L-1水杨酸(SA50)、100μmol·L-1水杨酸(SA100)等处理组,分析不同处理小白菜硒含量、镉含量、生物量、叶绿素荧光参数、丙二醛含量和抗氧化酶活性的变化,探究外源植物激素在增强小白菜硒富集能力上的应用潜力.结果表明:与CK相比,激素处理组小白菜地上部硒含量提高54.7％～229.1％,根部硒含量提高175.0％～276.8％,同时茉莉酸处理组地上部硒含量和硒积累量显著高于水杨酸处理组;与CK相比,植物激素处理显著降低小白菜地上部镉含量26.3％～63.2％、镉积累量38.5％～72.1％,且茉莉酸处理组地上部镉含量和镉积累量明显低于水杨酸处理组;此外,激素处理组的Fv'/Fm'、ΦpSⅡ和qP均显著下降,NPQ均显著升高,PSⅡ活性受到明显抑制;激素处理显著提高小白菜叶片MDA含量,引起严重的脂质过氧化;综上,叶面喷施50和100 μmol·L-1两种浓度的茉莉酸或水杨酸均能有效增强小白菜对土壤硒的富集能力,同时降低镉在地上部的积累,且茉莉酸的改善作用优于水杨酸.

Selenium is easy to be fixed in the acidic soil in the south and its effectiveness is low,which affects the absorption of selenium in tea trees in this region.The effects of phosphorus,amino acids and fulvic acid on soil selenium availability in southern tea plantation soil were studied,so as to provide a theoretical basis for improving soil selenium availability and tea selenium uptake in southern selenium-rich tea plantation.A field experiment was conducted with three factors,including phosphorus（P）,amino acid（A） and fulvic acid（H）.There was two phosphorus levels,including（168.8 kg/hm~2P1） and（337.5 kg/hm~2 P2）,and there was no gradient for amino acid or fulvic acid,which was 112.5 kg/hm~2.A total of 7 treatments were set up,including CK,A,P1-A,P2-A,H,P1-H and P2-H.The effects of organic materials alone or combined application of phosphorus and organic materials on selenium content in tea and selenium availability in tea plantation soil were studied.The results showed as follows:（1）The selenium content of tea with single application of amino acid（A）and combined application of amino acid and high phosphorus（P2-A） was significantly higher than CK,which was increased by 40.03% and 20.40%,respectively.（2）Single application of amino acid（A）and combined application of amino acid and high phosphorus（P2-A）significantly increased the soil available selenium content.The increase of available selenium by applying amino acid（A）was mainly due to the increase of soluble selenium,while combined application of amino acid and high phosphorus（P2-A）mainly came from the increase of soluble selenium and exchangeable selenium.（3）Both single application of amino acid（A）and combined application of amino acid and high phosphorus（P2-A）increased the content of tetravalent selenium in soluble selenium,which was the main reason for the increase of selenium content in tea.Amino acids and fulvic acids are organic acids,but amino acids in the tea plantations of latosolic red soils in southern China have better effects on soil selenium,and application of amino acids alone or in combination with amino acid and phosphorus can improve soil selenium availability and then improve selenium absorption in tea leaves.

[目的]研究不同富硒芽孢杆菌对富硒赤红壤硒形态、价态转化及菜心吸收累积硒的影响,为天然富硒蔬菜生产提供理论参考.[方法]以富硒赤红壤作为供试土壤、菜心作为供试作物,以2株富硒芽孢杆菌Bacillus cereus YLB1-6和Bacillus thuringiensis TXB2-5作为供试菌株,采用盆栽试验,以无菌水为对照(CK),接种不同菌液处理,收获后采样测定土壤硒形态和价态、pH、植株硒含量、植株生物量及硒累积量.[结果]接种富硒芽孢杆菌能促进残渣态硒(RES-Se)向不同硒形态的转化,但不同芽孢杆菌处理对土壤硒的形态转化存在一定的差异.YLB1-6和TXB2-5处理的土壤有效硒(AVA-Se)均显著增加(P<0.05,下同),主要由可溶态Se6+(SOL-Se6+)和可交换态及碳酸盐结合态Se2-(EX-Se2-)含量显著增加引起的,且2种价态硒含量YLB1-6处理均高于TXB2-5处理.YLB1-6处理能显著提高土壤pH.不同的富硒芽孢杆菌处理对菜心硒吸收累积效果不同,YLB1-6和TXB2-5处理均能显著提高菜心地上部硒含量;YLB1-6处理的菜心地下部硒含量与CK相当,而TXB2-5处理菜心地下部硒含量较CK显著增加;YLB1-6处理对于促进硒往菜心地上部转移的能力更强.接种富硒芽孢杆菌对菜心生物量无显著影响(P>0.05),但由于接种富硒芽孢杆菌能显著提高菜心地上部硒含量,菜心地上部硒累积量也相应显著增加.[结论]富硒芽孢杆菌能提高土壤有效硒含量,促进菜心地上部对土壤硒的吸收累积.其中YLB1-6对于促进植株地上部硒吸收效果更好,具有较好的田间应用潜力.

[目的]探讨夏季不同遮阴模式对茶园生境及夏茶品质的影响,筛选适宜的茶树遮阴模式,为广西优质夏茶生产提供理论依据.[方法]于2020年夏季,以金萱茶为试验品种,设置黑色遮阳网2种遮光度(60％和75％)、2种覆盖高度(离地1.3 m和1.8 m处)条件下的4个遮阴处理,即60％遮光度+1.3 m覆盖高度(T1处理)、60％遮光度+1.8 m覆盖高度(T2处理)、75％遮光度+1.3 m覆盖高度(T3处理)和75％遮光度+1.8 m覆盖高度(T4处理),以露天茶园为对照(CK),开展茶园不同遮阴模式栽培试验,分析各处理茶园的光照强度、空气温度、空气相对湿度和土壤温度等生境指标及夏茶叶绿素、茶多酚、氨基酸、维生素C、水浸出物和咖啡碱等品质指标.[结果]不同遮阴模式均能有效减少夏季茶园的光照强度,降低空气温度和土壤温度,增加茶园空气相对湿度,改善茶园生境,提高夏茶品质.其中,T3和T4处理改善茶园生境的效果优于T1和T2处理.遮阴25 d后,夏茶的叶绿素总量表现为T3处理＞T4处理＞T2处理＞T1处理,分别较CK显著增加79.66％、56.13％、28.24％和17.31％(P＜0.05,下同);茶多酚含量表现为T4处理＜T3处理＜T2处理＜T1处理,分别较CK显著降低14.82％、9.68％、1.27％和0.82％;游离氨基酸含量表现为T4处理＞T3处理＞T2处理＞T1处理,分别较CK显著增加14.67％、10.67％、5.78％和4.00％;氨基酸组分中的必需氨基酸占比表现为T4处理＞T2处理＞T1处理＞T3处理,分别较CK增加2.85％、2.75％、1.77％和1.59％;酚氨比表现为T4处理＜T3处理＜T2处理＜T1处理,分别较CK显著降低25.63％、18.43％、6.87％和4.52％;维生素C含量表现为T2处理＞T4处理＞T1处理＞T3处理,分别较CK显著增加13.74％、12.73％、10.01％和8.31％;水浸出物含量表现为T4处理＞T2处理＞T3处理＞T1处理,相较于CK,T4和T2处理分别显著增加65.53％和16.00％,T3处理减少3.92％但差异不显著(P＞0.05,下同),而T1处理显著减少5.28％;各遮阴处理夏茶的咖啡碱含量与CK无显著差异.[结论]夏季采用75％遮光度+1.8 m覆盖高度的遮阳网遮阴更有利于改善茶园生境,显著提高夏茶综合品质,推荐该遮阴模式作为广西优质夏茶生产的配套技术推广应用.

[目的]评价亚硒酸钠不同施用方法对水稻硒富集及转化的影响,为利用外源硒生产优质富硒稻谷提供参考依据.[方法]对盆栽优质常规稻基施或在其不同生育期叶面喷施亚硒酸钠,测定亚硒酸钠不同施用方法处理的水稻产量性状及水稻对硒的吸收和累积量,分析水稻对外源硒的综合利用率及稻米的有机硒转换率.[结果]施用亚硒酸钠水稻的产量均低于对照(CK),但差异不显著(P＞0.05,下同);仅在分蘖期叶面喷施1次亚硒酸钠的处理对提高水稻各部位硒含量无显著影响,而抽穗前叶面喷施1次亚硝酸钠的处理均能显著提高水稻各部位的硒含量(P＜0.05,下同).施用1次亚硒酸钠处理水稻的糙米和精米硒含量排序为抽穗前叶面喷施＞拔节期叶面喷施＞基施＞分蘖期叶面喷施＞ CK;施用2次亚硒酸钠水稻的糙米和精米硒含量排序为拔节期+抽穗前叶面喷施＞基施+抽穗期叶面喷施＞分蘖期+抽穗期叶面喷施＞基施+拔节期叶面喷施＞分蘖期+拔节期叶面喷施.不同亚硒酸钠施用方法处理水稻的精米有机硒含量占比存在较大差异,但均显著低于CK,其排序为CK(95.0％)＞基施(84.0％)＞基施+叶面喷施(76.0％～81.0％)＞叶面喷施(60.0％～71.0％).在水稻生长后期(拔节期后)叶面喷施、基施+叶面喷施、全部基施和生长前期(分蘖期)叶面喷施亚硒酸钠,水稻植株的外源硒综合利用率分别为35.80％～79.61％、15.33％～20.58％、2.93％和-4.65％.[结论]亚硒酸钠基施+叶面喷施的外源硒施用方式在保障稻米较高硒含量和有机硒含量占比的同时,能提高水稻对硒的综合利用率,可在富硒水稻生产上推广应用.

以桂经薯8号甘薯为试验材料,采用随机区组试验设计,设计喷施氨基酸螯合硒营养液用量0、4500、9000和13500 mL/hm2(硒:0、11.7、23.4、35.1 g/hm2,)4个浓度水平,3个重复,共12个小区,研究外源硒素强化对甘薯吸收累积硒及产量品质的影响.结果表明:施硒对甘薯块根产量无明显影响,但能显著提高块根、叶片和茎的总硒含量,其中,块根和叶片的总硒含量随着外源硒浓度的增加而增加,以喷施13500 mL/hm2处理的块根总硒含量最高,达222.61μg/kg;施硒提高了块根的花青素含量,以喷施13500 mL/hm2含量最高,达到9.65 mg/kg;施硒提高了块根的可溶性糖含量,以喷施9000 mL/hm2含量最高,达到6.18％;淀粉含量有所下降,各处理较对照下降2.20％～5.85％;甘薯块根和叶片硒含量与外源硒浓度呈极显著正相关关系,花青素含量、可溶性糖含量与块根硒含量呈显著正相关关系,淀粉含量与块根硒含量呈负相关关系.喷施外源硒对甘薯吸收累积硒及品质有提高作用,以喷施9000 mL/hm2外源氨基酸螯合硒肥为佳,可显著提高块根总硒含量、花青素含量和可溶性糖含量,提高甘薯品质.

施用外源硒是提高水稻硒含量的重要方法之一.通过盆栽试验,设置常规化肥(F)、化肥+有机肥(FO)和化肥+生物质炭(FC)3种肥料管理模式,0(Se0)、0.2(Se1)、0.4(Se2)和0.6 mg/kg(Se3)4个硒(Ⅳ)添加水平,研究在不同物料施用条件下,土施亚硒酸钠对水稻生长及硒吸收、转移和累积的影响.结果表明:施用适量外源硒对水稻产量及生物量影响不显著,但显著提高水稻各部位硒的含量,并促进硒向籽粒转移.施用有机肥和生物质炭降低了水稻根系对硒的吸收系数(RAI).施用有机肥不利于硒由稻秆向糙米和精米中转移,但适当的外源硒与生物质炭配施有利于提高硒由稻秆向糙米和精米转移系数.总之,有机肥与生物质炭的施用不能有效地提高水稻地上部,特别是籽粒的硒含量,但因施用有机肥能显著提高作物产量,从而增加水稻硒的总累积量,而生物质炭的添加则不能.水稻对外源硒的吸收利用率不超过5％.

[目的]对比分析广西金光农场蔗地与林地土壤团聚体组成及有机碳分布状况,探讨长期种植甘蔗对土壤质量的影响.[方法]采集蔗地及对应林地土壤,分别用干筛法和湿筛法测定其土壤团聚体组成,分析土壤基本理化性质、平均质量直径(MWD)、平均几何直径(GMD)及分形维数(D)等指标.[结果]蔗地与林地土壤＞5 mm粒级的团聚体含量差异显著,其它粒级的差异不显著;种植甘蔗有利于增加大粒径团聚体的有机碳含量;蔗地土壤的破坏率显著高于林地土壤,导致蔗地土壤1～0.5 mm、0.5～0.25 mm和＜0.25 mm粒级团聚体累积有机碳占比高于林地土壤.干筛法测定的蔗地土壤的MWD和GMD高于林地土壤,D值则低于林地土壤,但两者之间的差异均不显著;湿筛法的结果与之相反.[结论]长期种植甘蔗不会在较大程度上改变土壤团聚体组成特征,且团聚体机械稳定性显著增加、水稳性显著降低;甘蔗种植有增加大团聚体有机碳含量的趋势,并加速了土壤有机碳的运转.

土壤作为硒的重要储库之一,是硒通过植物进入食物链的重要物质基础,因此土壤硒的丰缺是影响食用作物硒水平的关键.降雨在土壤硒输入和输出上扮演着重要角色,了解降雨对土壤硒的作用对于在全国尺度上认识硒的地域分布成因具有重要意义.结合国内外研究现状,通过比较我国东南富硒区和东北-西南典型低硒带硒的降雨沉降量差别,阐明降雨是土壤硒输入的一种重要途径.通过综述降雨对土壤硒的淋溶输出和生物有效性的影响,揭示降雨在我国低硒区形成、地方病发生上所扮演的角色.最后总结了影响降雨对土壤硒作用的自然和人为因素,包括气候、土壤、植物和人类活动等,指出若要更好地预测未来土壤硒的变化趋势,必须综合研究影响土壤硒迁移的多种作用过程.

从广西不同富硒区土壤中分离出32株耐硒细菌,通过优化加硒时间、培养时间及加硒浓度进行富硒试验,筛选获得4株富硒能力较强的细菌,进一步通过对4株细菌16S rDNA序列分析及系统发育树分析明确了各菌株的种属关系.经鉴定,YLB1-6为Bacillus cereus,TXB1-10为Sinomonas sp.,TXB2-5为Bacillus thuringiensis,GPB1-5为Achromobacter denitrificans.在最适加硒时间、培养时间及适宜加硒浓度条件下,各菌株的硒转化率分别为:YLB1-674.22％,TXB1-1066.05％,TXB2-555.31％,GPB1-563.30％.各菌株处理能显著提高土壤可交换态硒含量,对土壤硒起到较强活化作用.土壤富硒细菌为硒转化提供更多的高效微生物载体,并为富硒产品开发研究提供技术支持.

富硒土壤是发展富硒产业的前提条件.以浔郁平原1:50000土地质量地球化学调查和多年定位试验结果为基础,分析了浔郁平原富硒土壤比例,并初步探讨了富硒土壤成因及影响因素.结果表明,浔郁平原的覃塘、桂平、平南和港南等4个县(市、区)的土壤硒含量明显高于全国平均水平(0.29 mg/kg),最高的覃塘区达到0.77 mg/kg.覃塘、桂平、平南3区县硒含量≥0.4 mg/kg的土壤均超过50％,其中覃塘区高达88.5％.桂平市的土壤对成土母质硒元素具有明显的继承性.土壤pH与土壤硒呈明显负相关关系,pH<5的土壤硒含量高达0.58 mg/kg.林地、草地、果园和水田的土壤硒含量依次降低,水田土壤硒含量只有林地的65.45％.因此,浔郁平原土壤硒资源丰富,成土母质、土地利用方式及土壤pH是影响土壤硒水平的重要因素.

产学研合作是科研机构、高校与企业之间通过联合开发、交换、获取各种科技创新知识、信息与技术,整合资源借助政府平台,着力提高企业发展,促进区域经济发展和实现转型升级,为经济、社会、生态创新发展提供动力的一种合作模式.以广西富硒农业研究中心近年开展产学研的实例作为研究对象,分析探讨既能满足科研机构联合大学培养人才提升科技创新能力又能很更好地服务社会、促进经济发展的产学研创新合作运作新机制和新模式.

为避免土壤因素的干扰,采用沙培方式模拟田间进行滴灌施肥.共设置4个不同配方(即配方A:N、P2 O5、K2 O含量比为14:9:14;配方B:N、P2 O5、K2 O含量比为14:9:14+中微量元素Si、Zn、B;配方C:N、P2 O5、K2 O含量比为14:9:14+中微量元素Si、Zn、B+氨基酸;配方D:N、P2 O5、K2 O含量比为14:9:14+中微量元素Si、Zn、B+腐殖酸)及不施肥对照处理.结果表明:甘蔗苗期形态指标和生理指标以配方A效果最佳,显著高于配方B,与配方C、D差异不显著.甘蔗苗期干物质累积量以配方A效果最佳,但其与配方C、D差异不显著,这可能是因为微量元素、氨基酸或腐殖酸的添加对干物质积累没有显著效果.养分累积量仍以配方A效果最佳,且其氮磷钾的积累量显著高于其他配方.根据上述试验结果初步认为在甘蔗苗期采用N、P2 O5、K2 O含量比为14:9:14配比时,可以满足甘蔗苗期生长对养分的需求.本试验为甘蔗滴灌用肥参数提供了更多数据参考,为广西滴灌施肥技术提供更科学的技术支撑.

近年来,天然富硒农产品的生产及加工成为研究热点.决定植物硒含量的主要因素为土壤有效形态硒含量,因此了解土壤硒形态及转化关系,寻找提高硒有效性方法尤为重要.笔者通过对国内外硒研究文献的整理和分析,对土壤硒形态的分类、土壤硒形态间的转化及提高土壤硒有效性的因素等进行深入分析.了解土壤硒化学形态和浸提形态及其关系,进一步研究不同形态间转化的驱动因子,寻找提高富硒区土壤硒有效性的方法.结合不同富硒区域土壤及作物特点,采取不同的硒素活化方法,为进一步开展相关研究提供更多科学依据.

[目的]探究硒对春茶谷胱甘肽过氧化物酶活性及品质的影响,为进一步研究硒调控茶叶生理机制提供理论依据.[方法]以氨基酸螯合硒作为硒源,对土壤进行淋施,研究不同质量浓度硒肥对春茶茶叶含硒量、谷胱甘肽过氧化物酶活性、茶叶中茶多酚、茶多糖含量的动态变化的影响.[结果]12～21 L/hm2的各处理下茶叶硒含量差异不显著,且均显著高于9 L/hm2和对照处理,其中15 L/hm2浓度处理时茶叶硒含量最高,为0.64 mg/kg;硒处理可以明显提高茶叶的GSH-Px活性,硒肥浓度在15 L/hm2时,酶活性最强.施硒后,可以增加茶的茶多酚、茶多糖含量.18 L/hm2硒处理下春茶的茶多酚、茶多糖含量为各处理最高.[结论]在适量的硒浓度处理下,可以明显提高茶叶的GSH-Px活性,并增加茶的茶多酚、茶多糖含量.