高寒矿区渣山坡向对恢复植物叶片养分重吸收的影响

doi:10.11733/j.issn.1007-0435.2022.06.021

草地学报 ›› 2022, Vol. 30 ›› Issue (6): 1491-1499.DOI: 10.11733/j.issn.1007-0435.2022.06.021

• 研究论文 • 上一篇

高寒矿区渣山坡向对恢复植物叶片养分重吸收的影响

梁德飞¹, 孙熠², 蒋宏宇^1,3, 杨占芳^1,3, 李长慧²

1. 青海大学省部共建三江源生态与高原农牧业国家重点实验室, 青海西宁 810016;
2. 青海大学农牧学院, 青海西宁 810016;
3. 青海大学生态环境工程学院, 青海西宁 810016

收稿日期:2021-11-17 修回日期:2022-01-10 发布日期:2022-07-05
通讯作者: 李长慧,E-mail:lichanghui68@163.com
作者简介:梁德飞(1985-),男,甘肃古浪人,博士,副教授,主要从事高寒草地恢复研究,E-mail:liangdefei-go@163.com
基金资助:
青海省科技厅应用基础研究项目（2019-ZJ-7041）资助

Effects of Tailings Slope Aspect on Leaf Nutrient Resorption of Restorative Plants in Alpine Mining Area

LIANG De-fei¹, SUN Yi², JIANG Hong-yu^1,3, YANG Zhan-fang^1,3, LI Chang-hui²

1. State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, Qinghai Province 810016, China;
2. College of Agriculture and Animal Husbandry, Xining, Qinghai Province 810016, China;
3. College of Eco-Environmental Engineering, Qinghai University, Xining, Qinghai Province 810016, China

Received:2021-11-17 Revised:2022-01-10 Published:2022-07-05

摘要/Abstract

摘要： 植物叶片养分重吸收是植物适应生境胁迫的重要机制。本试验以高寒矿区渣山阳坡、山顶平地和阴坡上播种的恢复植物老芒麦（Elymus sibiricus）、冷地早熟禾（Poa crymophila）和小花碱茅（Puccinellia tenuiflora）生长旺盛期的成熟叶片及凋亡期的衰落叶片为研究对象，测定不同坡向，不同时期的叶片氮磷含量，研究坡向对恢复植物叶片氮、磷重吸收效率的影响。结果表明：从阳坡、平地到阴坡，恢复植物成熟叶片养分含量以及养分重吸收效率逐渐降低；阳坡上老芒麦，平地上冷地早熟禾以及阴坡上小花碱茅的衰落叶片氮含量较低而氮素重吸收效率较高；恢复植物氮素重吸收效率均显著高于磷素重吸收效率，且此效应在阴坡上显著高于阳坡和平地。在高寒矿区渣山恢复中，应依据坡向差异选择养分重吸收效率较高的恢复物种，如阳坡上适宜播种老芒麦和冷地早熟禾，平地上适宜播种冷地早熟禾，阴坡上适宜播种小花碱茅，有助于提升渣山受损生态系统的恢复效率。

关键词: 渣山坡向, 恢复植物, 叶片养分含量, 养分重吸收效率, 高寒矿区

Abstract: Plant leaf nutrient resorption is an important mechanism for plants adapt to habitat stress.In this study we collected the mature and senesced leaves of restorative plants Elymus sibiricus,Poa crymophila and Puccinellia tenuiflora at flourishing and declining date in sunny slope,summit and shady slope as research objects. We measured the nitrogen and phosphorus concentration of mature and senesced leaves,and calculated the nitrogen,phosphorus resorption efficiency and relative resorption of restoration plants in different tailing slope,to explore the effects of tailings slope aspect in alpine mining area on plants leaf nutrient resorption efficiency. The results showed the nutrient concentrations of mature leaves and nutrient resorption efficiency were decreased gradually with slope aspect,from sunny slope,summit to shady slope. Moreover,the interaction between slope aspect and plant species could significantly change the nitrogen concentration of senesced leaves and nitrogen resorption efficiency. Nitrogen concentration of senesced leaves was low and nitrogen resorption efficiency was high at E. sibiricus in sunny slope,P. crymophila in summit and P. tenuiflora in shady slope,respectively. In addition,nitrogen resorption efficiency of restorative plants was higher than phosphorus resorption efficiency in entire tailing slope,the effect was higher in shady slope than the other slope aspects. Thus,the restoration of tailing of alpine mining area we need select the species in future,which have higher resorption efficiency in specific tailing slope aspect. Such as sow E. sibiricus and P. crymophila in sunny slope,P. crymophila in summit and P. tenuiflora in shady slope could further promote the restoration efficiency for damaged ecosystem.

Key words: Tailings slope aspect, Restorative plant, Leaf nutrient concentration, Nutrient resorption, Alpine mining area

中图分类号:

Q948.1

梁德飞, 孙熠, 蒋宏宇, 杨占芳, 李长慧. 高寒矿区渣山坡向对恢复植物叶片养分重吸收的影响[J]. 草地学报, 2022, 30(6): 1491-1499.

LIANG De-fei, SUN Yi, JIANG Hong-yu, YANG Zhan-fang, LI Chang-hui. Effects of Tailings Slope Aspect on Leaf Nutrient Resorption of Restorative Plants in Alpine Mining Area[J]. Acta Agrestia Sinica, 2022, 30(6): 1491-1499.

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高寒矿区渣山坡向对恢复植物叶片养分重吸收的影响

Effects of Tailings Slope Aspect on Leaf Nutrient Resorption of Restorative Plants in Alpine Mining Area

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