植物研究 ›› 2025, Vol. 45 ›› Issue (1): 45-56.doi: 10.7525/j.issn.1673-5102.2025.01.006
收稿日期:
2024-09-06
出版日期:
2025-01-20
发布日期:
2025-01-23
通讯作者:
罗青红
E-mail:lqh482325@sina.com
作者简介:
聂羽伶(1998—),女,硕士研究生,主要从事盐生植物相关研究。
基金资助:
Yuling NIE1,2, Qinghong LUO2(), Miao HE2, Zhaoxiang ZHANG1,2
Received:
2024-09-06
Online:
2025-01-20
Published:
2025-01-23
Contact:
Qinghong LUO
E-mail:lqh482325@sina.com
摘要:
新疆盐碱地广阔,明晰新疆乡土抗旱耐盐碱的沙枣(Elaeagnusangustifolia)各器官-土壤间碳、氮、磷化学计量循环特征,对于促进塔里木河中下游荒漠盐碱地植被构建和生态修复具有重要意义。以塔里木河中下游胡颓子属沙枣林植物(大果沙枣(E.moorcroftii)、沙枣)为对象,分析林内2种树种不同器官(叶、枝、根)和土壤的化学计量特征及其相互关系。结果表明:(1)沙枣林植物(大果沙枣、沙枣)叶片碳(C)、氮(N)、磷(P)的平均质量分数分别为424.36~484.40 g⋅kg-1、33.83~38.71 g⋅kg-1、1.50~2.20 g⋅kg-1,表现为C、N适中、P略低,且大果沙枣和沙枣的N∶P(17.64、22.82,质量比,下同)均大于16,受P限制。(2)沙枣林植物(大果沙枣、沙枣)各器官生态化学计量特征存在显著差异(P<0.05),N、P含量均为叶片最大。(3)沙枣林(大果沙枣、沙枣)土壤各元素含量受土层深度影响明显,表现为沿土壤剖面垂直递减,且呈现一定的表层(0~20 cm)富集现象。0~60 cm土层的C∶N(质量比)、C∶P(质量比)和N∶P分别为17.94、9.32、0.62,土壤N元素矿化能力较弱,氮素缺乏。(4)沙枣林(大果沙枣、沙枣)土壤N、P含量与根N、P含量呈显著正相关(P<0.05),沙枣叶N含量与0~20 cm土壤C、各层N含量呈显著负相关(P<0.05),与土壤P含量呈显著正相关,叶片P含量与各层土壤P含量呈显著正相关,叶片C与土壤C无显著相关(P>0.05)。总体来说,沙枣林植物面对贫瘠、盐碱较重的土壤时,其枝条和根系中贮存养分较少,通常会将养分优先提供给叶片,研究区沙枣林植物地上部主要受P限制,地下部主要受N限制。因此,沙枣林植物整体养分循环受N、P元素限制。
中图分类号:
聂羽伶, 罗青红, 何苗, 张兆祥. 塔里木河中下游盐碱地2种沙枣林植物-土壤碳氮磷生态化学计量特征[J]. 植物研究, 2025, 45(1): 45-56.
Yuling NIE, Qinghong LUO, Miao HE, Zhaoxiang ZHANG. Ecological Stoichiometry of C, N, P of Plant—Soil between two Elaeagnusangustifolia Forests in Saline-Alkaline Land in the Middle and Lower Reaches of Tarim River[J]. Bulletin of Botanical Research, 2025, 45(1): 45-56.
表1
沙枣林各器官C、N、P含量及生态化学计量比的相关性
器官 Organ | 元素 Element | 叶Leaf | 枝Branch | 根Root | 叶Leaf | 枝Branch | 根Root | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C | N | P | C | N | P | C | N | P | C∶N | C∶P | N∶P | C∶N | C∶P | N∶P | C∶N | C∶P | N∶P | ||
叶 Leaf | C | 1.000 | |||||||||||||||||
N | -0.694 | 1.000 | |||||||||||||||||
P | -0.756 | 0.899* | 1.000 | ||||||||||||||||
枝 Branch | C | -0.413 | 0.886* | 0.580 | 1.000 | ||||||||||||||
N | -0.340 | 0.772 | 0.783 | 0.702 | 1.000 | ||||||||||||||
P | -0.572 | 0.788 | 0.935** | 0.394 | 0.673 | 1.000 | |||||||||||||
根 Root | C | -0.191 | 0.425 | 0.538 | -0.145 | 0.429 | 0.533 | 1.000 | |||||||||||
N | -0.700 | -0.887* | -0.829* | -0.886* | -0.771 | -0.617 | -0.632 | 1.000 | |||||||||||
P | -0.817* | 0.628 | -0.826* | 0.397 | 0.360 | 0.886* | 0.105 | -0.459 | 1.000 | ||||||||||
叶 Leaf | C∶N | 0.959** | -0.868* | -0.864* | -0.565 | -0.536 | -0.688 | -0.313 | 0.840* | -0.787 | 1.000 | ||||||||
C∶P | 0.934** | -0.842* | -0.937** | -0.532 | -0.624 | -0.794 | -0.417 | 0.832* | -0.862* | 0.968** | 1.000 | ||||||||
N∶P | 0.781 | -0.757 | -0.962** | -0.474 | -0.702 | -0.896* | -0.500 | 0.733 | -0.888* | 0.822* | 0.937** | 1.000 | |||||||
枝 Branch | C∶N | 0.182 | -0.534 | -0.686 | -0.274 | -0.874* | -0.679 | -0.891* | 0.668 | -0.271 | 0.338 | 0.494 | 0.662 | 1.000 | |||||
C∶P | 0.504 | -0.569 | -0.846* | -0.271 | -0.569 | -0.936** | -0.445 | 0.431 | -0.845* | 0.549 | 0.717 | 0.899* | 0.647 | 1.000 | |||||
N∶P | 0.523 | -0.421 | -0.690 | -0.086 | -0.214 | -0.833* | -0.165 | 0.179 | -0.890* | 0.500 | 0.624 | 0.758 | 0.300 | 0.911* | 1.000 | ||||
根 Root | C∶N | -0.397 | 0.691 | 0.728 | 0.327 | 0.858* | 0.630 | 0.924** | -0.868* | 0.258 | -0.557 | -0.628 | -0.653 | -0.911* | -0.490 | -0.168 | 1.000 | ||
C∶P | 0.752 | -0.471 | -0.700 | -0.410 | -0.272 | -0.659 | 0.074 | 0.325 | -0.963** | 0.678 | 0.765 | 0.810 | 0.152 | 0.769 | 0.824* | -0.091 | 1.000 | ||
N∶P | 0.903* | -0.758 | -0.925** | -0.507 | -0.611 | -0.796 | -0.381 | 0.756 | -0.906* | 0.910* | 0.981** | 0.969** | 0.509 | 0.786 | 0.689 | -0.575 | 0.847* | 1.000 |
表3
沙枣林植物各器官和土壤C、N、P含量的相关性
土层深度 Soil depth/cm | 元素 Element | 叶Leaf | 枝Branch | 根Root | ||||||
---|---|---|---|---|---|---|---|---|---|---|
C | N | P | C | N | P | C | N | P | ||
0~20 | C | 0.573 | -0.823* | -0.657 | -0.395 | -0.335 | -0.594 | 0.143 | 0.608 | -0.486 |
N | 0.318 | -0.893* | -0.681 | -0.829* | -0.709 | -0.656 | -0.339 | 0.886* | -0.331 | |
P | -0.652 | 0.812* | 0.964** | 0.448 | 0.686 | 0.843* | 0.503 | -0.661 | 0.857* | |
20~40 | C | -0.315 | 0.338 | 0.556 | 0.371 | 0.636 | 0.462 | 0.103 | -0.369 | 0.555 |
N | -0.554 | -0.823* | 0.888* | 0.714 | 0.911* | 0.773 | 0.400 | 0.829* | 0.663 | |
P | -0.543 | 0.786 | 0.902* | 0.680 | 0.729 | 0.905* | 0.267 | -0.588 | 0.830* | |
40~60 | C | -0.302 | -0.025 | 0.006 | -0.052 | 0.166 | -0.269 | 0.386 | -0.423 | -0.170 |
N | 0.140 | -0.763 | -0.450 | -0.843* | -0.587 | -0.407 | -0.244 | 0.858* | -0.060 | |
P | -0.499 | 0.755 | 0.717 | 0.771 | 0.829* | 0.673 | -0.086 | -0.477 | 0.716 |
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