断根复水后疏叶骆驼刺叶片非结构性碳水化合物及C、N、P、K变化特征

doi:10.13292/j.1000-4890.202607.019

生态学杂志 ›› 2026, Vol. 45 ›› Issue (7): 2230-2239.doi: 10.13292/j.1000-4890.202607.019

断根复水后疏叶骆驼刺叶片非结构性碳水化合物及C、N、P、K变化特征

刘曦月^1,2,3,4,肖博文^1,5,黄彩变^1,2,3*,李向义^1,2,3,王欣^1,5,曾凡江^1,2,3

(¹中国科学院新疆生态与地理研究所新疆荒漠植物根系生态与植被修复重点试验室，乌鲁木齐 830011； ²中国科学院新疆生态与地理研究所干旱区生态安全与可持续发展全国重点实验室，乌鲁木齐 830011； ³新疆策勒荒漠草地生态系统国家野外科学观测研究站，新疆策勒 848300； ⁴中国科学院大学，北京 100049； ⁵石河子大学生命科学学院，新疆石河子 832003)

出版日期:2026-07-10 发布日期:2026-07-15

Changes in the concentrations of non-structural carbohydrates and C, N, P, and K in leaves of Alhagi camelorum following root severance and rewatering.

LIU Xiyue^1,2,3,4, XIAO Bowen^1,5, HUANG Caibian^1,2,3*, LI Xiangyi^1,2,3, WANG Xin^1,5, ZENG Fanjiang^1,2,3

(¹Xinjiang Key Laboratory of Desert Plant Roots Ecology and Vegetation Restoration, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; ²Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; ³Cele National Station of Observation and Research for Desert Grassland Ecosystem in Xinjiang, Cele 848300, Xinjiang, China; ⁴University of Chinese Academy of Sciences, Beijing 100049, China; ⁵College of Life Sciences, Shihezi University, Shihezi 832003, Xinjiang, China).

Online:2026-07-10 Published:2026-07-15

摘要/Abstract

摘要： 为探究断根后疏叶骆驼刺（Alhagi camelorum）再生过程中叶片的主要养分响应特征，本研究在塔克拉玛干沙漠南缘，采用野外定位试验，设置自然生长（CK）、断根处理（DG）及断根复水处理（DW），通过测定断根后不同时段叶片可溶性糖和淀粉含量及碳（C）、氮（N）、磷（P）、钾（K）含量，分析在断根再生过程中疏叶骆驼刺叶片的非结构性碳水化合物（NSC）和C、N、P化学计量比的变化特征，并探明不同养分间相互关系。结果表明：断根初期（第1～3天），DG与DW处理疏叶骆驼刺叶片的淀粉和NSC含量均显著下降，可溶性糖/淀粉比升高，C、N、P和K含量则均保持稳定；断根中期（第5～10天），DG处理叶片的NSC及其组分含量趋于稳定，DW处理的N、P含量则有下降趋势；断根后期（第25～50天），DW处理疏叶骆驼刺有新枝萌蘖生长，其叶片可溶性糖、N、P和K含量均有明显下降，N∶P、C∶N、C∶P升高，说明叶片养分回收显著。DW处理的叶片NSC与C、N、K含量均呈显著正相关，表现出明显的协同变化特征。这表明在断根复水处理下，疏叶骆驼刺老叶中的可溶性糖及N、P、K等营养物质可被回收再用于新枝萌蘖生长。本研究结果可为疏叶骆驼刺断根移植的植被恢复策略提供理论支撑。

关键词: 断根, 复水, NSC, 化学计量特征, 疏叶骆驼刺

Abstract: To investigate the responses of carbon and nutrients in leaves during regeneration of Alhagi camelorum following root severance, a field experiment was conducted at the southern margin of the Taklimakan Desert. There were three treatments, including natural growth without disturbance (CK), root severance without rewatering (DG), and root severance followed by rewatering (DW). Leaf soluble sugar and starch contents, together with carbon (C), nitrogen (N), phosphorus (P), and potassium (K) contents were measured at different time intervals after root severance. We analyzed variations in non-structural carbohydrates (NSC) and the stoichiometric ratios of C, N, and P throughout the regeneration process, and examined the correlations of those nutrients. The results showed that during the early stage after root severance (days 1-3), the starch and NSC contents in the leaves under both DG and DW treatments significantly decreased, while the soluble sugar/starch ratio increased. The C, N, P, and K contents remained stable. In the mid-stage (days 5-10), the contents of NSC and its components tended to stabilize under DG treatment, whereas N and P contents showed a decreasing trend under DW treatment. In the late stage (days 25-50), new shoot sprouted from A. camelorum in the DW treatment, and the soluble sugar, N, P, and K contents in the leaves decreased significantly, accompanied by increases in N∶P, C∶N, and C∶P ratios, indicating pronounced nutrient resorption from senescing leaves to new shoots. Under DW treatment, leaf NSC content was significantly and positively correlated with C, N, and K contents, indicating the synergistic coupling among NSC and key nutrients during A. camelorum regeneration. These findings suggest that under root severance with subsequent rewatering, soluble sugars together with N, P, and K stored in the old leaves can be actively remobilized to support the growth of new shoots. The results provide a theoretical basis for vegetation restoration strategies involving root severance-based transplantation of A. camelorum.

Key words: root severance, rewatering, non-structural carbohydrates, stoichiometric characteristics, Alhagi camelorum

刘曦月, 肖博文, 黄彩变, 李向义, 王欣, 曾凡江. 断根复水后疏叶骆驼刺叶片非结构性碳水化合物及C、N、P、K变化特征[J]. 生态学杂志, 2026, 45(7): 2230-2239.

LIU Xiyue, XIAO Bowen, HUANG Caibian, LI Xiangyi, WANG Xin, ZENG Fanjiang. Changes in the concentrations of non-structural carbohydrates and C, N, P, and K in leaves of Alhagi camelorum following root severance and rewatering.[J]. Chinese Journal of Ecology, 2026, 45(7): 2230-2239.

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断根复水后疏叶骆驼刺叶片非结构性碳水化合物及C、N、P、K变化特征

Changes in the concentrations of non-structural carbohydrates and C, N, P, and K in leaves of Alhagi camelorum following root severance and rewatering.

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