| 种培芳,单立山,苏世平,李毅.甘肃旱区5个经济林树种的苗期抗旱性综合评价[J].干旱地区农业研究,2017,35(1):198~204 |
| 甘肃旱区5个经济林树种的苗期抗旱性综合评价 |
| Comprehensive evaluation on drought resistance of five economic forest species at seedling stage in aird areas of Gansu province |
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| DOI：10.7606/j.issn.1000-7601.2017.01.30 |
| 中文关键词: 经济林 抗旱性 甘肃旱区 综合评价 |
| 英文关键词:economic forest drought resistance arid areas of Gansu comprehensive evaluation |
| 基金项目:甘肃省财政厅高等学校基本科研业务费项目“甘肃旱区优良抗旱节水经济林树种的筛选与评价研究”（038-041013）；国家星火计划项目“秦巴山区核桃产业发展关键技术集成与示范”（2015GA860002） |
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| 中文摘要: |
| 以核桃、枣、枸杞、沙棘和花椒5个树种的2年生苗木为试材，通过盆栽试验，测定了干旱胁迫处理下5个树种叶片的质膜透性、根系活力、丙二醛、叶绿素及渗透调节物质含量、抗氧化物酶活性等10个相关指标，并采用隶属函数法和灰色关联度法评价了5个树种的综合抗旱能力及各指标与树种抗旱性间的关系。结果表明：不同干旱处理下5个树种的抗旱性大小排列顺序不同,在对照处理下，核桃的隶属函数值最大，为0.5385，在重度胁迫下，则是花椒的最大，为0.5312。通过综合分析发现，5个树种的隶属函数值分别为花椒0.5610，核桃0.4992，枣0.4796，枸杞0.5028，沙棘0.5221，由此判断的5个树种抗旱性大小为：花椒>枸杞>沙棘>核桃>枣。在10个指标中，脯氨酸、膜透性、可溶性糖、可溶性蛋白、丙二醛和CAT 6项指标的关联度平均值可高达0.8562，可作为抗旱性鉴定的依据，而这6个指标代表的是渗透调节物质、酶活性系统和质膜过氧化3个体系，这些体系能充分反映5个经济林树种对干旱胁迫的适应性机制。 |
| 英文摘要: |
| A pot experiment was conducted to investigate the effect of drought stress on the drought resistance of five economic forest species, i. e., Juglans regia, Ziziphus jujuba Mill, Lycium barbarum L., Hippophae rhamnoides Linn and Zanthoxylum bungeanum Maxim. Using the methods of subordination function and grey correlation analysis, the relationship between drought resistance with the physiological and biochemical indexes including relative permeability of plasma (RPP), root vigor(RV), malondialdehyde (MDA),chlorophyll(a+b),osmotic adjustment substances and activities of antioxidant enzymes(SOD、POD、CAT) were evaluated. The results showed that the order of drought resistance in five economic forest species were different under four drought stress trentments, subordination function value of J.regia is 0.5385 which is the highest under CK treatment, and subordination function value of Z.bungeanum Maxim is 0.5312 which is the highest under HD treatment. Comprehensive evaluation indicated that the subordination function value of five economic forest species respectively were 0.5610(Z.bungeanum Maxim.), 0.4992(J.regia), 0.4796(Z.jujuba Mill), 0.5028(L.barbarum L.), 0.5221(H.rhamnoides Linn), with the order of Z.bungeanum Maxim.> L.barbarum L.> H.rhamnoides Linn > J.regia> Z.jujuba Mill. This result had some relevance to selecting appropriate species for drought conditions. The correlation degrees average value of proline (Pro), RPP, soluble sugur (SS), soluble protein (SP), MDA and CAT is 0.8562. The adaptation mechanism of five forest species to drought stress were attributed to osmotic adjustment substances, activities of antioxidant enzymes and lipid peroxidation. |
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