| 刘丙花,张纪霞,唐贵敏,赵登超,梁静.基于功能性状评价7种核桃砧木幼苗水分利用效率[J].干旱地区农业研究,2022,40(1):175~183 |
| 基于功能性状评价7种核桃砧木幼苗水分利用效率 |
| Evaluation of water use efficiency of seven walnut rootstock seedlings based on functional traits |
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| DOI：10.7606/j.issn.1000-7601.2022.01.20 |
| 中文关键词: 核桃砧木 水分利用效率 比叶面积 干旱 相关功能性状 |
| 英文关键词:walnut rootstock water use efficiency specific leaf area drought water use functional traits |
| 基金项目:山东省重点研发计划项目（2019GNC106081） |
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| 中文摘要: |
| 为筛选高效用水核桃砧木，测定了干旱条件下7种核桃砧木幼苗的长期水分利用效率（WUEL）及其水分利用相关功能性状，分析WUEL与各功能性状的相关性，采用隶属函数法、主成分分析法和聚类分析法对7种核桃砧木幼苗的水分利用效率进行综合评价。结果表明：7种核桃砧木幼苗的WUEL存在显著的种间差异（P<0.001），其中鸡爪绵和香玲较高，分别为66.26 g·kg-1和60.05 g·kg-1，核桃楸和麻核桃居中，分别为52.67 g·kg-1和47.78 g·kg-1，黑核桃、铁核桃和枫杨较低，分别为41.88、37.38 g·kg-1和32.85 g·kg-1。WUEL与比叶面积（SLA）呈显著负相关性，与其他13个功能性状呈显著或极显著正相关性。隶属函数分析发现7种核桃砧木幼苗的隶属函数值分别为麻核桃0.479，铁核桃0.217，黑核桃0.170，核桃楸0.502，枫杨0.167，鸡爪绵0.991，香玲0.700，由此判断7种核桃砧木的水分利用效率为：鸡爪绵＞香玲＞核桃楸＞麻核桃＞铁核桃＞黑核桃＞枫杨。主成分分析提取了株高、叶绿素含量和SLA作为水分利用效率的核心评价指标；7种核桃砧木的综合评价指数分别为麻核桃-0.175、铁核桃-3.197、黑核桃-3.158，核桃楸1.041、枫杨-3.801、鸡爪绵5.875、香玲3.414，由此判断7种核桃砧木水分利用效率由高到低依次为鸡爪绵、香玲、核桃楸、麻核桃、黑核桃、铁核桃和枫杨。聚类分析将7种核桃砧木聚为3组：第1组为鸡爪绵和香玲，干旱条件下生长表现较好，WUEL较大；第2组是核桃楸和麻核桃，干旱条件下生长表现中等，WUEL居中；第3组是黑核桃、铁核桃和枫杨，干旱条件下生长表现较差，WUEL较低。3种方法评价结果基本一致，且与各砧木幼苗的生长和形态表现一致；鸡爪绵和香玲实生幼苗WUEL较高，生长表现好，适合在干旱、半干旱核桃适生区广泛种植。 |
| 英文摘要: |
| In order to select walnut rootstock with high water use efficiency (WUE), the long\|term WUE (WUEL) and the fourteen water use functional traits of 7 types of walnut rootstock under drought condition were measured. Correlation relationship between WUEL and the functional traits were analyzed. Comprehensive evaluation of the WUE of the 7 types of walnut rootstock were carried out using subordinate function coefficient analysis, principal component analysis (PCA), and cluster analysis. The results showed that there were significant interspecific differences in WUEL among 7 types of walnut rootstock seedlings (P<0.001). Jizhuamian and Xiangling showed higher WUEL which was 66.26 g·kg-1and 60.05 g·kg-1, respectively. Manchurian walnut and Ma walnut had the medium WUEL which was 52.67 g·kg-1 and 47.78 g·kg-1, respectively. Black walnut, Iron walnut, and Chinese wingnut had lower WUEL which was 41.88, 37.38 g·kg-1and 32.85 g·kg-1, respectively. WUEL was negatively correlated with specific leaf area (SLA), and positively correlated with other 13 functional traits.The results from subordinate function coefficient analysis showed that subordinate function values of Ma walnut, Iron walnut, Black walnut, Manchurian walnut, Chinese wingnut, Jizhuamian, and Xiangling were 0.479,0.217,0.170,0.502,0.167,0.991, and 0.700, respectively, suggesting that WUE of the analyzed walnut rootstocks from highest to lowest were Jizhuamian, Xiangling, Manchurian walnut, Ma walnut, Iron walnut, Black walnut, and Chinese wingnut. Three functional traits of plant height, leaf chlorophyll content, and SLA were selectedas core evaluation indicators of WUE based on the PCA results. Synthetic analysis indexes of Ma walnut, Iron walnut, Black walnut, Manchurian walnut, Chinese wingnut, Jizhuamian, and Xiangling were -0.175,-3.197,-3.158, 1.041,-3.801, 5.875, and 3.414, respectively, suggesting that the WUE of the analyzed walnut rootstocks from PCA were in descending order as Jizhuamian, Xiangling, Manchurian walnut, Ma walnut, Black walnut, Iron walnut, and Chinese wingnut. Cluster analysis divided the studied species into three groups. The first group including Jizhuamian and Xiangling had the higher WUEL and the better growth performance under drought condition. The second group included Manchurian walnut, Ma walnut which were characterized by the moderate WUEL and growth performance under drought condition. The third group consisting of Black walnut, Iron walnut, and Chinese wingnut had the lowest WUEL and the worst growth performance under drought condition. The WUE evaluation results from the three evaluation methods for the 7 kinds of walnut rootstock seedlings were the same and consistent with the growth and morphological performance of each rootstock seedlings at the end of the drought treatment.The results from this study provide an important reference for selecting walnut rootstock with high WUE. |
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