| 磷水平对新牧1号苜蓿苗期根系形态和植株生长的影响 |
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| 引用本文： | 马红,孟捷,李宁.磷水平对新牧1号苜蓿苗期根系形态和植株生长的影响[J].新疆农业科学,2023,60(3):750-756. |
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| 作者姓名： | 马红 孟捷 李宁 |
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| 作者单位： | 1.伊犁师范大学生物与地理科学学院/伊犁师范大学资源与生态研究所,新疆伊宁 8350002.新疆农业大学草业与环境科学学院,乌鲁木齐 830052 |
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| 基金项目： | 新疆维吾尔自治区自然科学基金(201511A019);伊犁师范大学植物生态学重点学科科研项目(YLUPE2022YB07) |
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| 摘 要： | 【目的】研究磷水平对苜蓿根系形态和植株生长的影响，为苜蓿耐低磷机制的研究提供理论依据。【方法】在水培条件下，分析6种磷：0μmol/L(P1),50μmol/L(P2),100μmol/L(P3),250μmol/L(P4),500μmol/L(P5),1 000μmol/L(P6)水平对新牧1号苜蓿苗期根系性状、植株生长及养分积累的影响。【结果】随磷水平增加，根冠比显著降低(P<0.05),生物量先增加后减少，除P4、P5处理下株高无显著(P<0.05)差异外，其他各处理间均存在显著(P<0.05)差异，P4处理下株高最高，为9.37 cm; P2供磷水平下总根长、根表面积与根冠比均达到最大，分别为281.75 cm、20.78 cm2、1.13;6种磷水平下，地下部氮、磷、钾积累量均大于地上部积累量，P5...
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| 关 键 词： | 磷水平 苜蓿 根系性状 养分积累 |
| 收稿时间： | 2022-08-02 |
Effects of Phosphorus Levels on Root Morphology and Plant Growth of Alfalfa Seedlings |
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| MA Hong,MENG Jie,LI Ning.Effects of Phosphorus Levels on Root Morphology and Plant Growth of Alfalfa Seedlings[J].Xinjiang Agricultural Sciences,2023,60(3):750-756. |
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| Authors: | MA Hong MENG Jie LI Ning |
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| Institution: | 1. College of Biological and Geographical Sciences, Yili Normal University/Institute of Resources and Ecology, Yili Normal University, Yining, Xinjiang 835000,China2. College of Grassland and Environment Sciences, Xinjiang Agricultural University, Urumqi 830052, China |
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| Abstract: | 【Objective】 Low soil available phosphorus content is one of the main factors restricting crop growth. This project aims to clarify the effect of phosphorus level on alfalfa root morphology and plant growth in the hope of providing a theoretical basis for the study of alfalfa tolerant mechanisms. 【Methods】 In this experiment, under hydroponic conditions, six kinds of phosphorus were analyzed, which were 0 umol/L (P1), 50 umol/L (P2), 100 umol/L (P3), 250 umol/L (P4), 500 umol/L (P5), 1000 umol/L (P6) levels affecting the root characteristics, plant growth and nutrient accumulation of Xinmu 1 alfalfa at the seedling stage.【Results】 With the increase of phosphorus level, the root-to-shoot ratio decreased significantly (P<0.05), and the biomass first increased and then decreased. Except for the P4 and P5 treatments, there was no significant difference in plant height (P<0.05), and there was no significant difference among other treatments (P<0.05). The plant height was the highest under P4 treatment, which was 9.37 cm; the total root length, root surface area and root-to-shoot ratio reached the maximum under P2 phosphorus supply level, which were 281.75 cm, 20.78 cm2, and 1.13; 6 species, under the phosphorus level, the accumulation of nitrogen, phosphorus, and potassium in the ground were greater than the accumulation in the ground, and comprehensive comparison showed that the P5 treatment was more conducive to alfalfa growth. 【Conclusion】 Low phosphorus concentration can promote the growth of alfalfa roots, while excessively high phosphorus concentration inhibits its growth, reduces plant height, total root length, root surface area and root-to-shoot ratio. |
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| Keywords: | phosphorus level alfalfa root traits nutrient accumulation |
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