6种牧草苗期耐旱性综合评价

doi:10.13866/j.azr.2022.03.31

干旱区研究 ›› 2022, Vol. 39 ›› Issue (3): 978-985.doi: 10.13866/j.azr.2022.03.31

6种牧草苗期耐旱性综合评价

田小霞¹(),卫晓锋²,魏浩³(),许明爽¹,毛培春¹()

1.北京市农林科学院草业花卉与景观生态研究所,北京 100097
2.中色紫金地质勘查（北京）有限责任公司,北京 100012
3.河北地质大学河北省高校生态环境地质应用技术研发中心,河北石家庄 050031

收稿日期:2021-11-11 修回日期:2022-03-18 出版日期:2022-05-15 发布日期:2022-05-30
通讯作者: 魏浩,毛培春
作者简介:田小霞（1980-）,女,副研究员,主要从事植物生理生态学研究. E-mail: tianxi8002@126.com
基金资助:
河北省重点研发计划项目(19224205D);北京市农林科学院科技创新能力建设专项(KJCX20200107);北京市农林科学院科技创新能力建设专项(KJCX20170110)

Comprehensive evaluation of drought tolerance of six forage species at the seedling stage

TIAN Xiaoxia¹(),WEI Xiaofeng²,WEI Hao³(),XU Mingshuang¹,MAO Peichun¹()

1. Institute of Grassland, Flowers and Ecology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, China
2. Sino-Zijin Resources Co. Ltd., Beijing 100012, China
3. Hebei Center for Ecological and Environmental Geology Research, Hebei GEO University, Shijiazhuang 050031, Hebei, China

Received:2021-11-11 Revised:2022-03-18 Online:2022-05-15 Published:2022-05-30
Contact: Hao WEI,Peichun MAO

摘要/Abstract

摘要：

为筛选苗期抗旱性较强的牧草,用于干旱半干旱地区的人工草地建植。采用盆栽法对6种牧草进行模拟干旱试验,测定其株高（PH）、地上干重（SDW）、地下干重（RDW）、根冠比（RSR）、叶片相对含水量（RWC）、脯氨酸含量（Pro）、可溶性蛋白含量（SP）、抗氧化酶活性等指标,计算单项指标抗旱系数,运用相关分析、主成分分析、隶属函数法等方法对6种牧草进行抗旱性综合评价。结果表明：干旱胁迫对6种供试材料的生长和生理指标均有显著影响。相关分析表明,PH、GR、RDW等12项指标之间呈正相关关系,但这12项指标均与丙二醛（MDA）含量呈负相关关系。主成分分析表明,4个主成分贡献率可达98.40%,可代表6种供试材料绝大部分数据信息。结合隶属函数法及权重,计算出6种供试材料的抗旱性综合评价值（D值）,得到供试材料的抗旱性能力顺序为：长穗偃麦草> 披碱草>沙打旺>无芒雀麦>紫花苜蓿>扁穗冰草。D值与PH（0.984^**）、RDW（0.948^**）、Pro（0.971^**）和SP（0.959^**）均呈显著正相关,可作为相似材料苗期抗旱性评价的辅助指标。

关键词: 牧草, 干旱胁迫, 抗旱性, 综合评价

Abstract:

Artificial grassland can be planted in arid and semi-arid areas to screen forage species with strong drought resistance at the seedling stage. A water controlling experiment was conducted to determine the effect of drought stress on six forage species by adopting the pot culture method. The plant height (PH), shoot dry weight, root dry weight (RDW), root-shoot ratio (RSR), relative water content (RWC), proline content (Pro), soluble protein content (SP), antioxidant enzyme activity, and other indices of six materials were measured. Based on the drought resistance coefficient of each individual index, correlation analysis, principal component analysis, and subordinate function analysis were performed to comprehensively evaluate the drought resistance of six forage species. Result showed that drought stress had significant effects on the growth and physiological indices of six test materials. Correlation analysis showed that 12 indices such as PH, growth rate, and RDW were positively correlated with one another, but a negative correlation was observed between the 12 indices and malondialdehyde content. Principal component analysis showed that the contribution rate of four principal components could reach 98.40%, which could represent most of the data information of six test materials. The drought resistance (D value) of six test materials was comprehensively evaluated using a subordinate function method and weight coefficients, and the drought resistance ability of test materials was presented in the following order: Elytrigia elongatum > Elymus dahuricus > Astragalus adsurgens > Bromus inermis > Medicago sativa > Agropyron cristatum. Moreover, the D value was found to be significantly and positively correlated with PH (0.984^**), RDW (0.948^**), free proline content (0.971^**), and soluble protein content, indicating that it can be used as a good indicator for screening drought tolerance of similar materials at the seedling stage.

Key words: forage, drought stress, drought tolerance, comprehensive evaluation

田小霞,卫晓锋,魏浩,许明爽,毛培春. 6种牧草苗期耐旱性综合评价[J]. 干旱区研究, 2022, 39(3): 978-985.

TIAN Xiaoxia,WEI Xiaofeng,WEI Hao,XU Mingshuang,MAO Peichun. Comprehensive evaluation of drought tolerance of six forage species at the seedling stage[J]. Arid Zone Research, 2022, 39(3): 978-985.

图/表 6

表1

干旱胁迫对供试材料各性状的影响"

指标	处理	长穗偃麦草	无芒雀麦	披碱草	扁穗冰草	沙打旺	紫花苜蓿
PH/cm	CK	20.67±1.15ab	24.13±1.58a	22.8±1.68ab	19.13±1.34b	4.60±0.17c	5.17±0.44c
PH/cm	T	20.20±0.57a	19.97±0.55a	21.67±1.22a	14.10±1.01b	4.27±0.50c	4.20±0.23c
GR/%	CK	13.62±1.85a	9.53±0.72b	12.34±0.33ab	11.74±0.5ab	11.64±0.37ab	10.44±0.79b
GR/%	T	11.20±0.72a	6.09±1.62b	11.27±0.28a	8.78±0.35b	8.61±2.78b	5.57±0.86b
SDW/(g·株^-1)	CK	0.068±0.010a	0.058±0.001ab	0.062±0.002ab	0.051±0.001bc	0.032±0.001d	0.042±0.001cd
SDW/(g·株^-1)	T	0.056±0.001a	0.048±0.002b	0.053±0.001a	0.025±0.001c	0.025±0.001c	0.030±0.001c
RDW/(g·株^-1)	CK	0.023±0.001b	0.025±0.001b	0.036±0.001a	0.035±0.001a	0.016±0.001c	0.016±0.001c
RDW/(g·株^-1)	T	0.032±0.001b	0.018±0.001c	0.038±0.001a	0.019±0.001c	0.017±0.001c	0.011±0.001d
RSR	CK	0.33±0.02d	0.43±0.02cd	0.59±0.05b	0.68±0.01a	0.5±0.05bc	0.39±0.01d
RSR	T	0.57±0.04b	0.37±0.01c	0.72±0.04a	0.77±0.06a	0.68±0.03ab	0.37±0.02c
RWC/%	CK	89.62±1.00bc	94.31±0.43a	89.2±1.72c	92.81±2.33abc	93.78±0.95ab	94.63±0.69a
RWC/%	T	83.74±2.07a	73.11±1.53cd	76.8±0.94bc	71.55±0.68d	79.65±1.31b	76.82±0.87bc
Chl/(mg·L^-1)	CK	1.11±0.12b	0.88±0.07c	0.85±0.39c	0.97±0.17c	1.70±0.04a	1.02±0.12b
Chl/(mg·L^-1)	T	0.98±0.04b	0.81±0.01c	0.83±0.01c	0.79±0.04c	1.63±0.02a	0.83±0.05c
SOD/(U·g^-1 FW)	CK	1239.7±141.3b	1044.7±74.9bc	1039.5±74.5bc	979.5±8.8c	1470.9±272.1ab	1981.5±338.7a
SOD/(U·g^-1 FW)	T	1386.4±103.5bc	905.8±77.3cd	1082.0±81.8cd	860.0±145.4d	1686.2±105.7ab	2023.1±284.6a
POD/(U·g^-1 FW)	CK	3154.6±82.6c	3314.6±245.5c	2055.8±83.5d	3778.8±799.0bc	4715.9±2.4b	7378.5±26.3a
POD/(U·g^-1 FW)	T	3895.5±134.0b	2416.1±42.5c	2625.1±99.4c	2316.5±164.8c	3822.6±93.8b	5449.3±198.8a
CAT/(nmol·min^-1·g^-1 FW)	CK	529.6±48.5b	936.6±13.0a	115.1±3.8d	923.1±11.6a	237.1±4.5c	201.4±3.1c
CAT/(nmol·min^-1·g^-1 FW)	T	763.4±15.4c	1040.1±19.9a	155.9±13.0f	863.0±11.7b	324.0±17.8d	248.7±3.4e
Pro/(μmol·g^-1 FW)	CK	34.24±1.04ab	25.34±6.11b	37.53±1.20a	32.58±0.63ab	27.92±3.87ab	24.85±2.27b
Pro/(μmol·g^-1 FW)	T	40.12±5.37a	21.53±0.68b	40.08±0.70a	20.74±1.01b	32.66±0.91a	17.73±0.73b
SP/(mg·g^-1 FW )	CK	8.18±1.51a	8.97±1.53a	8.27±0.44a	8.96±0.49a	9.76±1.26a	10.12±1.39a
SP/(mg·g^-1 FW )	T	9.38±0.41ab	7.61±0.20c	8.61±0.57bc	7.33±0.87c	10.34±0.09a	8.43±0.50bc
MDA/(nmol·g^-1 FW)	CK	20.45±0.28d	18.95±0.42d	29.69±0.48c	34.94±0.68b	15.53±0.66e	41.93±1.14a
MDA/(nmol·g^-1 FW)	T	20.90±0.76d	21.03±1.24d	31.31±1.78c	43.07±3.24b	18.35±1.18d	50.29±1.31a

表1

表2

表3

表4

表5

表6

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供试材料	单项指标
供试材料	PH	GR	SDW	RDW	RSR	RWC	Chl	SOD	POD	CAT	Pro	SP	MDA
长穗偃麦草	0.977	0.822	0.824	1.377	1.694	0.934	0.881	1.118	1.235	1.442	1.171	1.147	1.022
无芒雀麦	0.827	0.640	0.829	0.743	0.863	0.775	0.916	0.867	0.729	1.111	0.850	0.848	1.110
披碱草	0.950	0.914	0.855	1.065	1.234	0.861	0.981	1.041	1.277	1.355	1.068	1.041	1.055
扁穗冰草	0.737	0.748	0.487	0.552	1.124	0.771	0.816	0.880	0.613	0.935	0.637	0.818	1.233
沙打旺	0.928	0.739	0.781	1.065	1.346	0.849	0.961	1.146	0.811	1.366	1.170	1.060	1.182
紫花苜蓿	0.813	0.534	0.706	0.673	0.948	0.812	0.816	1.021	0.739	1.235	0.714	0.833	1.199

指标	各指标间的相关系数
指标	PH	GR	SDW	RDW	RSR	RWC	Chl	SOD	POD	CAT	Pro	SP	MDA
PH	1.000
GR	0.602	1.000
SDW	0.809	0.253	1.000
RDW	0.963^**	0.619	0.691	1.000
RSR	0.733	0.656	0.238	0.867^*	1.000
RWC	0.899^*	0.555	0.557	0.956^**	0.898^*	1.000
Chl	0.705	0.580	0.741	0.555	0.232	0.341	1.000
SOD	0.814^*	0.322	0.470	0.796	0.738	0.836^*	0.400	1.000
POD	0.871^*	0.747	0.671	0.847^*	0.673	0.852^*	0.538	0.578	1.000
CAT	0.951^**	0.379	0.776	0.899^*	0.669	0.895^*	0.556	0.906^*	0.784	1.000
Pro	0.961^**	0.601	0.746	0.941^**	0.749	0.826^*	0.762	0.804	0.738	0.882^*	1.000
SP	0.952^**	0.692	0.610	0.982^**	0.896^*	0.936^**	0.598	0.837^*	0.822^*	0.880^*	0.956^**	1.000
MDA	-0.791	-0.588	-0.789	-0.796	-0.528	-0.727	-0.521	-0.338	-0.890^*	-0.663	-0.683	-0.705	1.000

主成分	各指标特征向量												特征值	贡献率 /%	累计贡献率/%
主成分	PH	GR	SDW	RDW	RSR	RWC	Chl	SOD	POD	CAT	Pro	SP	特征值	贡献率 /%	累计贡献率/%
第一主成分	0.991	0.662	0.725	0.981	0.816	0.932	0.657	0.832	0.878	0.931	0.961	0.983	9.092	75.768	75.768
第二主成分	0.121	-0.093	0.605	-0.093	-0.543	-0.300	0.645	-0.205	0.016	0.060	0.129	-0.131	1.278	10.649	86.417
第三主成分	-0.057	0.737	-0.210	-0.030	0.106	-0.116	0.264	-0.375	0.218	-0.331	-0.019	0.046	0.986	8.217	94.634
第四主成分	-0.030	0.020	-0.226	-0.048	0.087	-0.165	0.285	0.261	-0.397	-0.046	0.210	0.097	0.452	3.764	98.398

供试材料	综合指标值				隶属函数值				D值	排序
供试材料	CI₁	CI₂	CI₃	CI₄	µ(1)	µ(2)	µ(3)	µ(4)	D值	排序
长穗偃麦草	3.721	-1.227	-0.193	-0.510	1.000	0.008	0.499	0.000	0.813	1
无芒雀麦	-1.980	1.562	0.005	-0.248	0.236	1.000	0.576	0.148	0.344	4
披碱草	2.366	0.883	1.077	-0.344	0.818	0.759	0.986	0.094	0.798	2
扁穗冰草	-3.744	-1.249	1.113	0.259	0.000	0.000	1.000	0.435	0.101	6
沙打旺	1.819	0.240	-0.504	1.257	0.745	0.530	0.380	1.000	0.701	3
紫花苜蓿	-2.182	-0.210	-1.497	-0.413	0.209	0.370	0.000	0.055	0.203	5
权重					0.770	0.108	0.084	0.038

6种牧草苗期耐旱性综合评价

Comprehensive evaluation of drought tolerance of six forage species at the seedling stage

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