收藏 分销(赏)

永平县漾濞泡核桃优株立地土壤养分丰缺状况.pdf

上传人:自信****多点 文档编号:757075 上传时间:2024-03-05 格式:PDF 页数:11 大小:1.99MB
下载 相关 举报
永平县漾濞泡核桃优株立地土壤养分丰缺状况.pdf_第1页
第1页 / 共11页
永平县漾濞泡核桃优株立地土壤养分丰缺状况.pdf_第2页
第2页 / 共11页
永平县漾濞泡核桃优株立地土壤养分丰缺状况.pdf_第3页
第3页 / 共11页
亲,该文档总共11页,到这儿已超出免费预览范围,如果喜欢就下载吧!
资源描述

1、Vol.41 No.2Jun.2023第 41 卷 第 2 期2023 年 6 月经 济 林 研 究 Non-wood Forest Research收稿日期:2022-07-11基金项目:云南省省级林业科技推广项目(2021ts01,2021ts02);中央财政林业科技推广示范资金项目(2022TG03);云南省中青年学术和技术带头人后备人才项目(No.202205AC160041)。第一作者:和丽萍(),纳西族,副研究员,博士。通信作者:范志远(),研究员,硕士。引文格式:和丽萍,邹伟烈,周来潮,等.永平县漾濞泡核桃优株立地土壤养分丰缺状况 J.经济林研究,2023,41(2):11-20

2、,48.HE L P,ZOU W L,ZHOU L C,et al.Soil nutrients abundance and deficiency of Yangbi Bubble walnut superior plants originated in Yongping countyJ.Non-wood Forest Research,2023,41(2):11-20,48.永平县漾濞泡核桃优株立地土壤养分丰缺状况和丽萍1,邹伟烈1,周来潮2,马 杰2,罗冬梅2,苏 倩2,范志远1(1.云南省林业和草原科学院,云南 昆明 650201;2.永平县林业和草原局,云南 永平 672600)摘 要

3、:【目的】为核桃种植区土壤养分管理和施肥决策提供参考。【方法】采用野外调查和室内分析的方法,对永平县 7 个乡镇 19 个村庄 76 株漾濞泡核桃优株 15 项土壤养分指标进行测定分析。【结果】土壤 pH 值处于核桃正常生长范围的有 42.1%的样本,有 57.9%土壤样本的 pH 值处于偏酸性范围;有 85.4%土壤样本的有机质含量处于适宜及以上范围;土壤全氮、全磷含量丰富,有 13.2%的样本处于缺乏全钾的状态;土壤碱解氮、有效磷和速效钾处于中等及以上水平的样本比例分别为 96.1%、98.7%、100.0%,有效磷含量属于中等偏上变异,有 1.3%的样本处于极缺乏有效磷状态;土壤中量元素

4、交换性钙、交换性镁含量均较为丰富,分别有 96.0%、85.5%的样本表现为中等及以上水平;微量元素中,100.0%样本的有效铁含量处于较丰富及以上水平,100%样本的有效锰含量处于中等及以上水平,有 96.0%、92.1%样本的有效锌、有效铜含量处于中等及以上水平,但有效铜、有效锌含量的变异系数高达 97.28%、80.85%,属于强变异,分布极不均匀,3.9%样本的有效铜含量处于缺乏水平,7.9%样本的有效锌含量处于极缺乏水平,土壤有效硼含量较低,80.2%的样本处于缺乏等级。【结论】永平县漾濞泡核桃优株适宜生长在微酸或中性土壤中;有机质、全氮、碱解氮、有效锌含量处于中等及以上水平;有效磷

5、、速效钾、有效铁、有效锰、交换性钙含量丰富;部分优株立地土壤的全磷、全钾、交换性镁、有效铜含量偏低;有效硼含量缺乏。根据核桃优株立地土壤养分丰缺状况,应减少氮磷钾化肥用量,增施有机肥,并在基肥中增加硼肥和生物菌肥;同时建议土壤偏酸性地区施用碱性肥料,部分缺磷、镁、铜地区提高施用磷、镁、铜肥的比例。关键词:漾濞泡核桃优株;土壤养分;丰缺状况;评价;永平县中图分类号:S664.1 文献标志码:A 文章编号:10038981(2023)02001110Soil nutrients abundance and deficiency of Yangbi Bubble walnut superior pl

6、ants originated in Yongping countyHE Liping1,ZOU Weilie1,ZHOU Laichao2,MA Jie2,LUO Dongmei2,SU Qian2,FAN ZHiyuan1(1.Yunnan Academy of Forestry and Grassland,Yunnan 650201,Kunming,China;2.Forestry and Grassland Bureau of Yongping,Yunnan 672600,Yongping,China)Abstract:【Objective】In order to provide re

7、ference for soil nutrient management and fertilization decision-making in walnut planting area.【Method】Field investigation,indoor analysis and related methods were used,15 soil nutrient indexes of 76 superior plants of Yangbi Bubble walnut in 19 villages of 7 towns in Yongping county were determined

8、 and analyzed.【Result】42.1%of soil pH was in the normal growth range of walnut,57.9%was in the acidic range,and 85.4%of soil organic matter was in the suitable or above range.The content of total N and total P in soil was rich,13.2%of total K was deficient,the content of alkaline N,available P and a

9、vailable K in soil were rich,the proportion was medium or above was 96.1%,98.7%and 100%respectively,and the available P belongs to medium or above variation,Doi:10.14067/ki.1003-8981.2023.02.002http:/12第 2 期和丽萍,等:永平县漾濞泡核桃优株立地土壤养分丰缺状况核桃 Juglans regia,属胡桃科 Juglandaceae 核桃属 Juglans 植物,是中国主要的经济林树种之 一1。据

10、测定,核桃仁中含有脂肪 5.0 6.4 g/kg、蛋白质 1.5 2.0 g/kg、糖 1 g/kg,并含有钙、磷、铁、胡萝卜素、核黄素等多种营养物质2。核桃从土壤中吸取养分以供生长所需,良好的土壤养分状况是获得高产、优质核桃坚果的关键前提之一,对核桃生长发育具有决定性作用3。前期研究者分别对贵州核桃主产区核桃园土壤状况、黔西北高原核桃优株立地土壤状况、核桃产量与立地土壤养分的关系、黔南州核桃优株立地土壤养分因子、新疆乌什县核桃生产园土壤状况等进行了研究,结果表明:核桃土壤养分的限制因子会随地区不同产生差异,核桃优株间立地土壤养分状况存在明显差异;土壤有效养分对核桃优株养分状况的影响比较明显;

11、不同产量核桃树立地土壤的碱解氮、有机质、有效铁、有效锰、有效锌含量有一定的差异,核桃产量与立地土壤交换镁、交换钙含量呈显著正相关,应重视钙、镁肥的施用4-8。只有对核桃土壤养分丰缺状况有了充分的了解,才能为核桃土壤的精准施肥提供科学指导。作为永平县脱贫致富以及乡村振兴的重点产业,该县现有核桃种植面积10.58万hm2,人均核桃种植面积 0.72 hm2,认证核桃有机基地 5.10 万 hm2(居云南省第 1 位)。目前,核桃已成为永平县“一县一品”的支柱性产业。但永平县核桃多为坡地种植,并且长期以来受传统经营习惯的影响,“重栽轻管”现象尤为突出,核桃产量及坚果品质均受到一定的影响。因此,对永平

12、县核桃优株土壤养分状况进行系统研究迫在眉睫。本研究中采用野外调查及室内分析的方法,对永平县 7 个乡镇19 个村庄 76 株核桃优株 15 项土壤养分指标进行测定分析,以期探明土壤养分的盈亏状况,为永平县核桃的土壤养分管理以及核桃合理施肥提供参考。1 材料与方法1.1 研究地概况永平县位于大理白族自治州西部(9917 9956E,2508 2545N),地处云岭山脉分支博南山和云台山之间,地势西北高,东南低。最高海拔 2 933 m(青神龙山),最低海拔 1 130 m(渔坝平坦),县城海拔 1 620 m。年平均气温15.9,最高气温 31.5,最低气温-2.4;年霜期 103 d,年日照

13、2 062.8 h,年降水量 678.6 mm。该研究区土壤类型以红壤和紫色砂壤土为主。1.2 土样采集及处理2021 年 78 月,在永平县的 7 个乡镇 19 个主产村,通过访谈及调查(立地条件、管理方式、生长结果情况)等方式筛选出具有代表性的 76 株核桃优株(表 1)。优株选择基本按以下要求:品种统一为漾濞泡核桃,树龄 20 40 年生,单株产量 17.5 22.5 kg。在标准树冠滴水线下,避开施肥点,每株树选东、南、西、北 4 个方向为取样点,用取土器挖取 0 40 cm 土层处的土样,充分混合后,用四分法取 500 g 左右作为 1 个样品。将样品带回室内,在适当环境条件下风干、

14、碾碎,过 1 mm 筛,用于养分含量测定。the contents of exchange of Ca,Mg in soil were rich,and 96%and 85.5%of them were medium or above,respectively.100%of soil available Fe was in the rich and above level,respectively,the percentage of available Mn content 100%was medium or above.The content of available Zn and avai

15、lable Cu was 96%and 92.1%was in the medium or above,but the coefficient of variation of available Cu and available Zn was 97.28%and 80.85%,which belongs to strong variation and uneven distribution,the 3.9%of available Cu was deficient,7.9%of available Zn was deficient,the content of available B in s

16、oil was low,and 80.2%of available B was deficient.【Conclusion】The superior plants of Yangbi Bubble walnut in Yongping county were suitable for growing in low acid or neutral soil,the contents of organic matter,total N,alkaline N,available Zn were above medium level,and the contents of available P,av

17、ailable K,exchange of Ca,available Fe and available Mn were abundant.Available B was in deficiency.The contents of total K,total P,exchangeable Mg and available Cu in some excellent plant soils were low.Therefore,different walnut superior plants should apply fertilizer according to their nutrient-ri

18、ch and nutrient-deficient conditions,reduce the amount of N,P,K fertilizer,increase organic fertilizer,and increase boron fertilizer and biological bacteria fertilizer in basal fertilizer,and suggest the application of alkaline fertilizer in acid soil area,increasing the proportion of P,Mg and Cu fe

19、rtilizer in some areas of P,Mg and Cu deficiency.Keywords:Yangbi Bubble walnut superior plants;soil nutrients;abundance and deficiency;evaluation;Yongping county13第 41 卷经 济 林 研 究1.3 指标测定及分级核桃优株土壤有机质、碱解氮、有效磷、速效钾、全氮、全磷、全钾、交换性钙、交换性镁、有效铁、有效锌、有效锰、有效铜、有效硼含量及 pH 值的测定均参考文献 9 中的方法。土壤 pH 值的分级参照以下标准1,10:偏酸性(4.

20、5 pH 5.5)、正常(5.5 pH 8.2)、偏碱性(8.2)。参照全国第 2 次土壤普查和相关标准中的划分等级标准进行土壤养分含量单项指标的评价10-13,具体的土壤养分含量单项指标分级标准见表 2。表 1 永平县核桃优株立地土壤采样点的分布Table 1 Distribution of soil sampling sites of walnut individuals originated in Yongping county编号No.乡镇Towns采样地点Sampling location地理坐标 Geographic coordinates海拔Altitude/m样本数Number

21、 of samples经度(E)Longitude纬度(N)LatitudeBDX北斗乡北斗村9930132534432 0185黑豆场村9932242537122 0104新村9932512541231 9833上寨村9935422524092 0001BNZH博南镇东庄村9927522520551 9214青羊厂村9937192524442 0335CHJX厂街乡界面村9936362512001 9942老鹰坡村9936002514241 7884三村村9936362512362 0134瓦畔村9940122515361 9843LMX龙门乡官上村9929462534262 0724龙门村

22、9929172531011 8172LJZH龙街镇龙街村9946412519531 8223田心村9945322515491 9682邑俚村9945172519451 8993贵口村9948442518552 0502SHYZH杉阳镇松坡村9931482513122 17315SHXX水泄乡乐把村9943172505031 8708瓦厂村9940292505441 7812表 2 永平县核桃优株立地土壤养分含量分级标准Table 2 Soil nutrient classification index of walnut individuals originated in Yongping c

23、ounty等级Rank养分评价Nutrient evaluation有机质Organic matter/(gkg-1)碱解氮Alkali hydrolysable N/(mgkg-1)有效磷Available P/(mgkg-1)速效钾Available K/(mgkg-1)全氮Total N/(gkg-1)全磷Total P/(gkg-1)全钾Total K/(gkg-1)1丰富 40 150 40 200 2.00 1.0 252较丰富30,40)120,150)20,40)150,200)1.50,2.00)0.8,1.0)20,25)3适宜20,30)90,120)10,20)100,

24、150)1.00,1.50)0.6,0.8)15,20)4中等10,20)60,90)5,10)50,100)0.75,1.00)0.4,0.6)10,15)5缺乏6,10)30,60)3,5)30,50)0.50,0.75)0.2,0.4)5,10)6极缺 6 30 3 30 0.50 0.2 5等级Rank养分评价Nutrient evaluation交换性钙Exchangeable Ca/(mgkg-1)交换性镁Exchangeable Mg/(mgkg-1)有效铁Available Fe/(mgkg-1)有效锰Available Mn/(mgkg-1)有效铜Available Cu/(

25、mgkg-1)有效锌Available Zn/(mgkg-1)有效硼Available B/(mgkg-1)1丰富 1 000 300 20.0 30 1.8 3.0 2.02较丰富70,1 000)200,300)10.0,20.0)15,30)1.0,1.8)1.0,3.0)1.0,2.0)3中等500,700)100,200)4.5,10.0)5,15)0.2,1.0)0.5,1.0)0.5,1.0)4较缺300,500)50,100)2.5,4.5)1,5)0.1,0.2)0.3,0.5)0.2,0.5)5极缺 300 50 2.5 1 0.1 0.3 0.21.4 数据处理使用 Mi

26、crosoft Excel 2003 软件和 DPS 7.05 统计分析软件进行数据处理并绘制图表。14第 2 期和丽萍,等:永平县漾濞泡核桃优株立地土壤养分丰缺状况2 结果与分析2.1 核桃优株立地土壤 pH 值状况永平县核桃优株立地土壤 pH 值等级分布状况见表 3。由表 3 可看出,有 42.1%样本土壤的 pH值处于核桃正常生长范围,57.9%样本土壤的 pH值处于偏酸性范围,其中有 10.5%样本土壤的 pH值处于核桃最适宜生长范围。就各乡镇土壤 pH 值可供核桃正常生长的比例来看,杉阳镇和水泄乡的比例均较大,均为60.0%,其次为龙门乡(50.0%)、北斗乡(38.5%)、厂街乡(

27、38.5%)、博南镇(22.2%),最小的为龙街镇(20.0%)。表 3 永平县核桃优株立地土壤 pH 值等级分布状况Table 3 pH classification of walnut individuals originated in Yongping county乡镇编号Town No.样本数Sample number偏酸性Partial acidity(pH5.5)正常Normal(5.5 pH 8.2)偏碱性Partial Alkalinity(pH 8.2)适宜Optimum(6.4pH7.2)样本数Sample number比例Proportion/%样本数Sample num

28、ber比例Proportion/%样本数Sample number比例Proportion/%样本数Sample number比例Proportion/%BDX13861.5538.50017.7BNZH9777.8222.200111.1CHJX13861.5538.50017.7LMX6350.0350.00000LJZH10880.0220.00000SHYZH15640.0960.000426.7SHXX10440.0660.000110.02.2 核桃优株立地土壤有机质丰缺状况研究区核桃优株立地土壤的有机质含量较为丰富,为(36.0117.58)g/kg,最小值为 10.72 g/k

29、g,最大值为 97.90g/kg,变异系数为 48.83%,属于中等变异。永平县核桃优株立地土壤有机质含量等级分布状况见表 4。从表 4 来看,27.6%样本土壤的有机质含量处于适宜水平,57.8%样本土壤的有机质含量处于丰富及较丰富范围,14.5%样本土壤的有机质含量处于中等水平。在所调查的 7 个乡镇中,来自厂街乡和龙门乡的核桃优株立地土壤的有机质含量 100%处于适宜及以上水平,其余乡镇中土壤有机质含量处于适宜及以上水平的比例分别为北斗乡 84.6%、博南镇 77.8%、龙街镇60.0%、杉阳镇 93.3%、水泄乡 80.0%。表 4 永平县核桃优株立地土壤有机质含量等级分布状况Tabl

30、e 4 Grade distribution of soil organic matter content of walnut individuals originated in Yongping county乡镇编号Town No.样本数Sample number含量Content/(gkg-1)各等级样本所占比例 The proportion of samples in each grade/%丰富Excess range较丰富High range适宜Optimum中等Medium缺乏Deficiency极缺乏Extreme deficiencyBDX1329.139.8215.415.4

31、53.815.400BNZH933.6213.4222.255.6022.200CHJX1354.4516.8076.915.47.7000LMX634.436.1616.750.033.3000LJZH1022.156.99020.040.040.000SHYZH1545.2420.3546.640.06.76.700SHXX1024.135.63020.060.020.0002.3 核桃优株立地土壤大量元素丰缺状况2.3.1 大量元素总体含量永平县核桃优株立地土壤大量元素总体含量统计结果见表 5。从表 5 可看出,7 个乡镇核桃优株土壤的全氮、全磷与全钾含量均属于中等变异。永平县核桃优株土

32、壤有机质和大量元素丰缺等级分布状况见表 6。从表 6 可看出:82.9%样本的全氮含量处于适宜及以上等级,龙街镇缺乏等级的样本比例为 10.0%,为全氮缺乏最为严重的地区,其次是北斗乡,缺乏等级的样本比例为 7.7%,其余乡镇核桃优株立地土壤全氮均无缺乏现象;80.3%样本的全磷含量处于适宜及以上等级,其中32.9%样本的全磷含量处于丰富水平,21.1%样本的全磷含量处于较丰富水平,同土壤含氮状况相似,龙街镇为全磷最为缺乏的地区,土壤全磷含量处于缺乏等级的样本比例为 30.0%,其次是北斗15第 41 卷经 济 林 研 究乡,缺乏等级的样本比例为 7.7%,其余乡镇核桃优株立地土壤全磷均无缺乏

33、现象;64.5%样本的全钾含量处于适宜及以上等级,其中有 21.1%样本的全钾含量处于丰富水平,有 18.4%样本的全钾含量处于较丰富水平,与土壤含氮及含磷状况相同,龙街镇为全钾最为缺乏的地区,土壤全钾含量处于缺乏等级的样本比例达到了 70.0%,其次为厂街乡和北斗乡,全钾含量处于缺乏等级的样本比例分别为 15.4%、7.7%。表 5 永平县核桃优株立地土壤大量元素总体含量统计 结果(n=76)Table 5 The total contents of macro-element of walnut individuals originated in Yongping county g/kg

34、指标Index全氮含量Total N content全磷含量Total P content全钾含量Total K content最大值 Max.4.112.3332.25最小值 Min.0.660.305.02平均值 Mean1.750.8818.15标准差Standard deviation0.730.377.08变异系数Coefficient of variation/%41.7841.9938.972.3.2 有效性大量元素含量永平县核桃优株立地土壤有效性大量元素含量统计结果见表 7,其含量等级分布状况见表 8。由表 7 8 可看出,永平核桃优株立地土壤的有效性大量元素含量存在一定的地域

35、性差异。土壤中碱解氮含量的变异系数为 46.55%,属于中等变异,有 42.1%样本的碱解氮含量处于丰富水平,22.4%样本的碱解氮含量处于较丰富水平,21.1%样本的碱解氮含量处于适宜水平,除北斗乡、博南镇土壤碱解氮含量处于缺乏等级的样本比例为15.4%、11.1%以外,其余 5 个乡镇核桃优株立地土壤的碱解氮均不存在缺乏现象。土壤中有效磷含量的变异系数为 68.03%,属于中等偏上变异,有93.4%样本的有效磷含量处于适宜及以上等级,7 个乡镇中仅博南镇有 11.1%的样本处于极缺乏等级,其余乡镇核桃优株立地土壤的有效磷均未出现缺乏现象。土壤中速效钾含量的变异系数为56.02%,属于中等变

36、异,93.5%样本的速效钾含量处于适宜及以上等级,7 个乡镇核桃优株立地土壤速效钾均未出现缺乏现象。表 6 永平县核桃优株立地土壤大量元素总体含量等级分布状况Table 6 The distribution of the contents of macro-element in the soil of walnut individuals originated in Yongping county大量元素Macro-element乡镇编号Town No.样本数Sample number含量Content/(gkg-1)各等级样本所占比例 The proportion of samples in

37、 each grade/%丰富Excess range较丰富High range适宜Optimum中等Medium缺乏Deficiency极缺乏Extreme deficiency全氮Total NBDX131.310.5015.423.123.130.87.70BNZH91.830.4533.344.411.111.100CHJX132.310.7269.223.17.7000LMX61.640.3316.766.716.7000LJZH101.050.33010.030.050.010.00SHYZH152.150.8640.033.320.06.700SHXX101.680.4220.0

38、50.030.0000全磷Total PBDX130.680.2215.415.423.138.57.70BNZH91.080.4866.711.111.111.100CHJX130.920.2538.530.823.17.700LMX61.110.3266.716.716.7000LJZH100.610.3810.0030.030.030.00SHYZH151.030.3840.026.726.76.700SHXX100.820.1410.040.050.0000全钾Total KBDX1314.434.66015.438.538.57.70BNZH923.685.5144.422.233.

39、3000CHJX1313.544.1407.723.153.915.40LMX617.853.24033.333.333.300LJZH109.672.4300030.070.00SHYZH1522.374.3740.026.733.3000SHXX1026.364.7460.030.010.000016第 2 期和丽萍,等:永平县漾濞泡核桃优株立地土壤养分丰缺状况表 7 永平县核桃优株立地土壤有效性大量元素含量统计 结果(n=76)Table 7 Total contents of available macro-element of walnut individuals originate

40、d in Yongping county mg/kg 指标Index碱解氮含量Alkali hydrolysable N content有效磷含量Available P content速效钾含量Available K content最大值 Max.412.60114.50778.75最小值 Min.42.941.4468.75平均值 Mean154.4137.52330.13标准差 Standard deviation71.8725.52184.93变异系数Coefficient of variation/%46.5568.0356.022.4 核桃优株立地土壤微量元素丰缺状况永平县核桃优株立

41、地土壤微量元素含量统计结果见表 9,其含量等级分布状况见表 10。从表9 10 可看出,7 个乡镇核桃优株立地土壤交换性钙、交换性镁含量较为丰富,均属于中等变异,68.4%土壤样本的交换性钙含量处于丰富水平,18.4%样本的交换性钙含量处于较丰富水平,各乡镇按照交换性钙含量由大到小排序依次为水泄乡、杉阳镇、厂街乡、龙门乡、北斗乡、龙街镇、博南镇,其中水泄乡土壤样本的交换性钙含量最为丰富,北斗乡有 15.4%的样本处于缺乏等级,龙门乡有16.7%的样本处于极缺乏等级。表 8 永平县核桃优株立地土壤有效性大量元素含量等级分布状况Table 8 The distribution of the con

42、tents of available macro-element in the soil of walnut individuals originated in Yongping county大量元素Macro-element乡镇编号Town No.样本数Sample number含量Content/(mgkg-1)各等级样本所占比例 The proportion of samples in each grade/%丰富Excess range较丰富High range适宜Optimum中等Medium缺乏Deficiency极缺乏Extreme deficiency碱解氮Alkali hyd

43、rolysable NBDX13106.8745.1015.47.738.423.115.40BNZH9129.6438.6933.344.5011.111.10CHJX13231.8971.7592.307.7000LMX6164.5080.9033.333.333.3000LJZH10121.8731.2120.030.030.020.000SHYZH15179.0776.5960.020.013.36.700SHXX10127.2728.4820.040.030.010.000有效磷Available PBDX1325.5816.4023.123.138.515.400BNZH929.6

44、920.6122.244.411.111.1011.1CHJX1344.4720.5761.515.423.1000LMX664.8917.35100.000000LJZH1043.2032.9640.030.030.0000SHYZH1546.5124.8546.733.320.0000SHXX1015.489.1610.010.070.010.000速效钾Available KBDX13337.69209.6453.830.87.77.700BNZH9224.03130.2355.611.111.122.200CHJX13432.69175.5692.37.70000LMX6298.132

45、05.1666.616.716.7000LJZH10248.38115.9170.0020.010.000SHYZH15321.08138.4980.020.00000SHXX10397.00210.2880.0010.010.000表 9 永平县核桃优株立地土壤微量元素含量统计结果(n=76)Table 9 Total contents of trace-element of walnut individuals originated in Yongping county mg/kg 指标Index交换性钙含量Exchangeable Ca content交换性镁含量Exchangeable

46、 Mg content有效铁含量Available Fe content有效锰含量Available Mn content有效铜含量Available Cu content有效锌含量Available Zn content有效硼含量Available B content最大值 Max.3 907.81517.1977.38129.4610.049.580.99最小值 Min.154.6910.9411.887.990.140.160.01平均值 Mean1 413.82230.4751.0245.311.772.960.32标准差 Standard deviation738.72118.961

47、5.0030.791.722.400.20变异系数Coefficient of variation/%52.2551.6129.4067.9597.2880.8562.5417第 41 卷经 济 林 研 究表 10 永平县核桃优株立地土壤中微量元素含量等级分布状况Table 10 The distribution of the contents of trace-element in the soil of walnut individuals originated in Yongping county微量元素Trace-element乡镇编号Town No.样本数Sample number含

48、量Content/(mgkg-1)各等级样本所占比例 The proportion of samples in each grade/%丰富Excess range较丰富High range中等Medium缺乏Deficiency极缺乏Extreme deficiency交换性钙ExchangeableCaBDX131 173.56709.1361.5023.115.40BNZH91 196.01752.4333.344.422.200CHJX131 509.25583.7484.615.4000LMX61 493.49890.1766.716.70016.7LJZH101 095.94493

49、.7140.040.020.000SHYZH151 867.5821.9086.713.3000SHXX101 387.66514.6390.010.0000交换性镁Exchangeable MgBDX13220.07140.3838.515.415.423.17.7BNZH9223.09113.6222.211.155.611.10CHJX13268.39114.7330.838.530.800LMX6214.84107.0316.733.333.3016.7LJZH10127.8149.38010.050.040.00SHYZH15279.48118.6746.726.720.06.70S

50、HXX10239.8479.5330.030.040.000有效铁Available FeBDX1338.8510.60100.00000BNZH946.5615.9588.911.1000CHJX1361.0910.97100.00000LMX656.088.52100.00000LJZH1055.998.35100.00000SHYZH1558.4414.53100.00000SHXX1038.6011.33100.00000有效锰Available MnBDX1349.2428.8576.97.715.400BNZH979.1138.4877.811.111.100CHJX1334.55

展开阅读全文
相似文档                                   自信AI助手自信AI助手
猜你喜欢                                   自信AI导航自信AI导航
搜索标签

当前位置:首页 > 学术论文 > 论文指导/设计

移动网页_全站_页脚广告1

关于我们      便捷服务       自信AI       AI导航        获赠5币

©2010-2024 宁波自信网络信息技术有限公司  版权所有

客服电话:4008-655-100  投诉/维权电话:4009-655-100

gongan.png浙公网安备33021202000488号   

icp.png浙ICP备2021020529号-1  |  浙B2-20240490  

关注我们 :gzh.png    weibo.png    LOFTER.png 

客服