CN111855751B - 一种基于电阻值快速评价柳树品种耐盐性的方法 - Google Patents
一种基于电阻值快速评价柳树品种耐盐性的方法 Download PDFInfo
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Abstract
本发明公开了一种基于电阻值快速评价柳树品种耐盐性的方法,取每种待测柳树品种一年生粗度3‑5mm的枝条若干根,每根长度相同;测量每根枝条的中间粗度、枝条的初始含水量以及初始电阻值;然后将枝条浸入NaCl溶液中,在浸入2h、4h、6h、8h时拿出测定电阻值,并在浸入192h时拿出测定枝条的含水量、皮孔黑孔数和电导率值;采用基于初始电阻值的柳树耐盐分级评价模型进行分级。本方法操作方便,评价柳树品种耐盐性快捷且不受外界环境影响,可在10日内评价出待测样品的耐盐能力。
Description
技术领域
本发明专利属植物抗逆领域,具体涉及到柳树品种耐盐能力的快速鉴定评价方法。
背景技术
耐盐性是植物抗逆的主要性状,传统的耐盐性鉴定方法是将植株种植在盐土上,通过测定植株的成活率与生长状况进行评价,一般需要1年以上的时间才能评价出待测品种的耐盐能力,并且受外界环境的影响较大。柳树是杨柳科柳属和钻天柳属的总称,是重要的抗逆树种,在土壤重金属修复、盐碱地绿化、生物燃料等方面发挥着重要的作用,许多品种具有良好的耐盐性,一些品种的耐盐能力已超过4‰(极耐盐)。
发明内容
发明目的:针对上述现有技术,提出一种基于电阻值快速评价柳树品种耐盐性的方法,可快速鉴定柳树的耐盐能力。
技术方案:一种基于电阻值快速评价柳树品种耐盐性的方法,包括以下步骤:
取每种待测柳树品种一年生粗度3-5mm的枝条若干根,每根长度相同;测量每根枝条的中间粗度、枝条的初始含水量以及初始电阻值;然后将枝条浸入NaCl溶液中,在浸入2h、4h、6h、8h时拿出测定电阻值,并在浸入192h时拿出测定枝条的含水量、皮孔黑孔数和电导率值;对于每种待测品种,将各枝条的测定数据均取平均值后,采用基于初始电阻值的柳树耐盐分级评价模型进行分级:
当R0<200时,分级评价模型为:
Y=3.869[-0.124(X1-4.273)/0.396+0.229(X2-79.05)/14.214+0.258(X3-69.95)/7.338+0.238(X4-61.4)/5.236+0.176(X5-52.15)/4.87-0.207(X6-51.412)/3.196-0.043(X8-13.275)/7.347-0.072(X9-440.084)/240.969]2
根据评价值Y划分耐盐性为:
(a):0<Y≤1,待测柳树品种极耐盐;
(b):1<Y≤2,待测柳树品种较耐盐;
(c):2<Y≤3,待测柳树品种中度耐盐;
(d):Y>3,待测柳树品种敏盐。
当200≤R0<250时,分级评价模型为:
Y=[-0.276(X1-3.69)/0.271+0.231(X2-94.65)/7.795+0.485(X3-76.5)/7.578+0.422(X4-68.45)/8.062+0.456(X5-64.95)/5.246-0.371(X6-47.413)/3.146+0.119(X7-93.444)/0.408+0.159(X8-14.42)/4.383+0.268(X9-163.745)/97.068+1]2+[0.336(X1-3.69)/0.271-0.316(X2-94.65)/7.795+0.046(X3-76.5)/7.578+0.195(X4-68.45)/8.062+0.004(X5-64.95)/5.246-0.187(X6-47.413)/3.146+0.048(X7-93.444)/0.408+0.357(X8-14.42)/4.383-0.274(X9-163.745)/97.068+1]2
根据评价值Y划分耐盐性为:
(a):0<Y≤1,待测柳树品种极耐盐;
(b):1<Y≤5,待测柳树品种较耐盐;
(c):5<Y≤10,待测柳树品种中度耐盐;
(d):Y>10,待测柳树品种敏盐。
当R0≥250时,分级评价模型为:
Y=[-0.243(X1-3.565)/0.352+0.259(X2-108.15)/11.695+0.218(X3-81.55)/11.941+0.151(X4-70.5)/8.281+0.269(X5-71.55)/6.143-0.049(X6-44.88)/4.727-0.071(X7-93.093)/0.623+0.083(X8-12.39)/2.648-0.016(X9-164.428)/65.417]2+[0.141(X1-3.565)/0.352+0.01(X2-108.15)/11.695-0.22(X3-81.55)/11.941+0.577(X4-70.5)/8.281-0.081(X5-71.55)/6.143-0.272(X6-44.88)/4.727+0.339(X7-93.093)/0.623+0.405(X8-12.39)/2.648+0.49(X9-164.428)/65.417+2]2
根据评价值Y划分耐盐性为:
(a):0<Y≤1,待测柳树品种极耐盐;
(b):1<Y≤5,待测柳树品种较耐盐;
(c):5<Y≤10,待测柳树品种中度耐盐;
(d):Y>10,待测柳树品种敏盐。
其中:R0为初始电阻值;X1为中间粗度;X2为2h电阻值;X3为4h电阻值;X4为6h电阻值;X5为8h电阻值;X6为初始含水量;X7为192h含水量;X8为192h皮孔黑孔数;X9为192h电导率。
进一步的,所述NaCl溶液的浓度为100mM/L。
进一步的,所述电导率值测定方法为:将枝条用超纯水漂洗2次后吸干表面水分放入离心管,取50mL超纯水加入离心管中,枝条完全浸泡2小时后用数字电导率仪测定离心管中水的电导率值得到。
有益效果:本方法操作方便,评价柳树品种耐盐性快捷且不受外界环境影响,可在10日内评价出待测样品的耐盐能力。
具体实施方式
下面对本发明做更进一步的解释。
(1)取材与处理
取待测柳树品种一年生粗度3-5mm的枝条,每种处理取10根,每根8cm长,用游标卡尺测量每根的中间粗度,及枝条的初始含水量和初始电阻值;初始值均测定三次,取其平均值。再将枝条浸到100mM/L浓度的NaCl溶液中,间隔2、4、6、8h拿出各测定一次电阻值。在192h(8d)时测定枝条的含水量、皮孔黑孔数和电导率值。
(2)含水量测定
采用深圳市源恒通科技有限公司生产的YHT01水分测试仪,在“White PoplarKeruing”测试模式,将两个探测头插入枝条两端1mm读数。
(3)电阻值测定
采用南京金亦优仪表有限公司生产MF-47A内磁指针式机械万用表的电阻档,将两个探测头插入枝条两端1mm读数。
(4)皮孔黑孔数测定。
皮孔是枝条周皮形成的小开孔,是皮层的物质交换组织。盐胁迫下皮孔黑孔数量的多少意味着有多少皮孔组织可以与外界进行气体和水分等物质交换,本发明选取皮孔黑孔数作为耐盐性重要指标之一。皮孔黑孔数测定具体方法为:目测各枝条表皮在盐胁迫后产生皮孔黑点的数量值。
(5)电导率值
将枝条用超纯水漂洗2次后吸干表面水分放入离心管,取50mL超纯水加入离心管中,枝条完全浸泡2小时后用赛默飞世尔科技公司生产的Control 320C-06A数字电导率仪测定离心管中水的电导率值。
(6)对于每种待测品种,将各枝条的测定数据均取平均值后,采用基于初始电阻值(R0)的柳树耐盐分级评价模型进行分级,评价模型根据主成份聚类分析建立:
当R0<200时:
Y=3.869[-0.124(X1-4.273)/0.396+0.229(X2-79.05)/14.214+0.258(X3-69.95)/7.338+0.238(X4-61.4)/5.236+0.176(X5-52.15)/4.87-0.207(X6-51.412)/3.196-0.043(X8-13.275)/7.347-0.072(X9-440.084)/240.969]2(X7系数为0,未列入方程)
(a):0<Y≤1,待测柳树品种极耐盐(耐盐程度4‰以上质量浓度);
(b):1<Y≤2,待测柳树品种较耐盐(耐盐程度3‰∽4‰质量浓度);
(c):2<Y≤3,待测柳树品种中度耐盐(耐盐程度2‰∽3‰质量浓度);
(d):Y>3,待测柳树品种敏盐(耐盐程度2‰以下质量浓度)。
当200≤R0<250时:
Y=[-0.276(X1-3.69)/0.271+0.231(X2-94.65)/7.795+0.485(X3-76.5)/7.578+0.422(X4-68.45)/8.062+0.456(X5-64.95)/5.246-0.371(X6-47.413)/3.146+0.119(X7-93.444)/0.408+0.159(X8-14.42)/4.383+0.268(X9-163.745)/97.068+1]2+[0.336(X1-3.69)/0.271-0.316(X2-94.65)/7.795+0.046(X3-76.5)/7.578+0.195(X4-68.45)/8.062+0.004(X5-64.95)/5.246-0.187(X6-47.413)/3.146+0.048(X7-93.444)/0.408+0.357(X8-14.42)/4.383-0.274(X9-163.745)/97.068+1]2
(a):0<Y≤1,待测柳树品种极耐盐(耐盐程度4‰以上质量浓度);
(b):1<Y≤5,待测柳树品种较耐盐(耐盐程度3‰∽4‰质量浓度);
(c):5<Y≤10,待测柳树品种中度耐盐(耐盐程度2‰∽3‰质量浓度);
(d):Y>10,待测柳树品种敏盐(耐盐程度2‰以下质量浓度)。
当R0≥250时:
Y=[-0.243(X1-3.565)/0.352+0.259(X2-108.15)/11.695+0.218(X3-81.55)/11.941+0.151(X4-70.5)/8.281+0.269(X5-71.55)/6.143-0.049(X6-44.88)/4.727-0.071(X7-93.093)/0.623+0.083(X8-12.39)/2.648-0.016(X9-164.428)/65.417]2+[0.141(X1-3.565)/0.352+0.01(X2-108.15)/11.695-0.22(X3-81.55)/11.941+0.577(X4-70.5)/8.281-0.081(X5-71.55)/6.143-0.272(X6-44.88)/4.727+0.339(X7-93.093)/0.623+0.405(X8-12.39)/2.648+0.49(X9-164.428)/65.417+2]2
(a):0<Y≤1,待测柳树品种极耐盐(耐盐程度4‰以上质量浓度);
(b):1<Y≤5,待测柳树品种较耐盐(耐盐程度3‰∽4‰质量浓度);
(c):5<Y≤10,待测柳树品种中度耐盐(耐盐程度2‰∽3‰质量浓度);
(d):Y>10,待测柳树品种敏盐(耐盐程度2‰以下质量浓度)。
其中:
R0:初始电阻值(kΩ);X1:中间粗度(mm);X2:2h电阻值(kΩ);X3:4h电阻值(kΩ);X4:6h电阻值(kΩ);X5:8h电阻值(kΩ);X6:初始含水量(%);X7:192h含水量(%);X8:192h皮孔黑孔数(个);X9:192h电导率(μS/cm)。
运用本方法随机对一批柳树品种的耐盐性进行了评价,评价结果如表1所示,结果与种植在盐土一年以上的统计评价结果基本相符。
表1
本方法操作方便,评价柳树品种耐盐性快捷且不受外界环境影响,可在10日内评价出待测样品的耐盐能力。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (3)
1.一种基于电阻值快速评价柳树品种耐盐性的方法,其特征在于,包括以下步骤:
取每种待测柳树品种一年生粗度3-5mm的枝条若干根,每根长度相同;测量每根枝条的中间粗度、枝条的初始含水量以及初始电阻值;然后将枝条浸入NaCl溶液中,在浸入2h、4h、6h、8h时拿出测定电阻值,并在浸入192h时拿出测定枝条的含水量、皮孔黑孔数和电导率值;对于每种待测品种,将各枝条的测定数据均取平均值后,采用基于初始电阻值的柳树耐盐分级评价模型进行分级:
当R0<200时,分级评价模型为:
Y=3.869[-0.124(X1-4.273)/0.396+0.229(X2-79.05)/14.214+0.258(X3-69.95)/7.338+0.238(X4-61.4)/5.236+0.176(X5-52.15)/4.87-0.207(X6-51.412)/3.196-0.043(X8-13.275)/7.347-0.072(X9-440.084)/240.969]2
根据评价值Y划分耐盐性为:
(a):0<Y≤1,待测柳树品种极耐盐;
(b):1<Y≤2,待测柳树品种较耐盐;
(c):2<Y≤3,待测柳树品种中度耐盐;
(d):Y>3,待测柳树品种敏盐;
当200≤R0<250时,分级评价模型为:
Y=[-0.276(X1-3.69)/0.271+0.231(X2-94.65)/7.795+0.485(X3-76.5)/7.578+0.422(X4-68.45)/8.062+0.456(X5-64.95)/5.246-0.371(X6-47.413)/3.146+0.119(X7-93.444)/0.408+0.159(X8-14.42)/4.383+0.268(X9-163.745)/97.068+1]2+[0.336(X1-3.69)/0.271-0.316(X2-94.65)/7.795+0.046(X3-76.5)/7.578+0.195(X4-68.45)/8.062+0.004(X5-64.95)/5.246-0.187(X6-47.413)/3.146+0.048(X7-93.444)/0.408+0.357(X8-14.42)/4.383-0.274(X9-163.745)/97.068+1]2
根据评价值Y划分耐盐性为:
(a):0<Y≤1,待测柳树品种极耐盐;
(b):1<Y≤5,待测柳树品种较耐盐;
(c):5<Y≤10,待测柳树品种中度耐盐;
(d):Y>10,待测柳树品种敏盐;
当R0≥250时,分级评价模型为:
Y=[-0.243(X1-3.565)/0.352+0.259(X2-108.15)/11.695+0.218(X3-81.55)/11.941+0.151(X4-70.5)/8.281+0.269(X5-71.55)/6.143-0.049(X6-44.88)/4.727-0.071(X7-93.093)/0.623 +0.083(X8-12.39)/2.648-0.016(X9-164.428)/65.417]2+[0.141(X1-3.565)/0.352+0.01(X2-108.15)/11.695-0.22(X3-81.55)/11.941+0.577(X4-70.5)/8.281-0.081(X5-71.55)/6.143-0.272(X6-44.88)/4.727+0.339(X7-93.093)/0.623+0.405(X8-12.39)/2.648+0.49(X9-164.428)/65.417+2]2
根据评价值Y划分耐盐性为:
(a):0<Y≤1,待测柳树品种极耐盐;
(b):1<Y≤5,待测柳树品种较耐盐;
(c):5<Y≤10,待测柳树品种中度耐盐;
(d):Y>10,待测柳树品种敏盐;
其中:R0为初始电阻值;X1为中间粗度;X2为2h电阻值;X3为4h电阻值;X4为6h电阻值;X5为8h电阻值;X6为初始含水量;X7为192h含水量;X8为192h皮孔黑孔数;X9为192h电导率。
2.根据权利要求1所述的基于电阻值快速评价柳树品种耐盐性的方法,其特征在于,所述NaCl溶液的浓度为100mM/L。
3.根据权利要求1所述的基于电阻值快速评价柳树品种耐盐性的方法,其特征在于,所述电导率值测定方法为:将枝条用超纯水漂洗2次后吸干表面水分放入离心管,取50mL超纯水加入离心管中,枝条完全浸泡2小时后用数字电导率仪测定离心管中水的电导率值得到。
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