| 盐碱条件下施磷对柳枝稷生长发育及耐盐性的影响 |
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| 引用本文： | 何海锋,吴娜,刘吉利,许兴.盐碱条件下施磷对柳枝稷生长发育及耐盐性的影响[J].草业学报,2022,31(10):64-74. |
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| 作者姓名： | 何海锋 吴娜 刘吉利 许兴 |
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| 作者单位： | 1.宁夏大学农学院，宁夏 银川 750021;2.宁夏大学生态环境学院，宁夏 银川 750021;3.宁夏大学西北退化生态系统恢复与重建教育部重点实验室，宁夏 银川 750021 |
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| 基金项目： | 国家自然科学基金项目(31860344);宁夏自然科学基金项目(2022AAC03062) |
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| 摘 要： | 为了探究不同施磷水平对宁夏银北盐碱地区柳枝稷生长发育及耐盐性的影响，通过田间试验，以2种生态型柳枝稷品种“Alamo”和“Pathfinder”为供试材料，采用裂区试验设计，设置不施磷（0） 、施低磷（30 kg·hm-2 P2O5） 和施高磷（90 kg·hm-2 P2O5） 共3个施磷水平，每个处理设3个重复，共计18个小区。分析比较了各生育时期内柳枝稷生长指标、渗透调节物质及抗氧化酶活性的变化，同时采用隶属函数法综合评价了盐碱地柳枝稷的耐盐性。结果表明，随着施磷水平的提高，两种生态型柳枝稷开花期株高、分蘖数、叶面积指数、干物质积累和生物产量等农艺性状和相对叶绿素、丙二醛、可溶性糖含量、过氧化物酶活性等生理特性均呈逐渐升高的总趋势。与不施磷处理相比，分别提高了7.74%、10.21%、14.64%、11.88%、22.22%、3.85%、74.29%、14.70%和57.77%。隶属函数分析结果表明，施低磷处理下柳枝稷各抗盐指标隶属函数值的均值最大。因此，施磷量为30 kg·hm-2 处理时，既可以提高两种生态型柳枝稷的生理特性及生物产量，又能在一定程度上提高其耐盐性，是较为理想的施磷水平。
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| 关 键 词： | 施磷水平 盐碱地 柳枝稷 耐盐性 隶属函数值 |
| 收稿时间： | 2021-10-19 |
| 修稿时间： | 2021-12-29 |
Effects of phosphorus application on the growth and salt resistance of switchgrass under saline alkali conditions |
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| Hai-feng HE,Na WU,Ji-li LIU,Xing XU.Effects of phosphorus application on the growth and salt resistance of switchgrass under saline alkali conditions[J].Acta Prataculturae Sinica,2022,31(10):64-74. |
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| Authors: | Hai-feng HE Na WU Ji-li LIU Xing XU |
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| Institution: | 1.College of Agriculture，Ningxia University，Yinchuan 750021，China;2.College of Resources and Environmental Science，Ningxia University，Yinchuan 750021，China;3.Key Laboratory for Degenerated Ecosystem in Northwest China under the Ministry of Education，Ningxia University，Yinchuan 750021，China |
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| Abstract: | This study investigated the effects of different levels of phosphorus application on the growth， development and drought resistance of switchgrass （Panicum virgatum） in the saline area of Yinbei， Ningxia. In a field experiment two ecotypes of switchgrass， “Alamo” and “Pathfinder” were compared at three levels of phosphorus application： No phosphorus （P0）， low phosphorus （30 kg·ha-1 P2O5） and high phosphorus （90 kg·ha-1 P2O5）. There were three replications for each treatment. Changes in growth indexes， osmoregulatory substances and antioxidant enzyme activities were analyzed and compared at different stages of the reproductive period， and the switchgrass drought resistance was evaluated using the affiliation function method. It was found that with increasing phosphorus application levels， agronomic traits including as plant height， tiller number， leaf area index， dry matter accumulation and biological yield， and physiological characteristics such as SPAD value， malondialdehyde， soluble sugar content and peroxidase activity showed a general trend of gradual increase in both ecotypes. Compared to the P0 treatment， the above nine parameters were increased by 7.74%， 10.21%， 14.64%， 11.88%， 22.22%， 3.85%， 74.29%， 14.70% and 57.77%， respectively. In the multivariate analysis， the mean value of the membership function for each drought tolerance index was largest under the low phosphorus treatment. Therefore， 30 kg·ha-1 P2O5 equivalent is the ideal phosphorus application to improve the physiological characteristics， biological yield and salinity resistance of both ecotypes in this experiment. |
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| Keywords: | phosphorus application level saline alkali land switchgrass salt tolerance membership function value |
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