南京林业大学学报(自然科学版) ›› 2024, Vol. 48 ›› Issue (6): 121-128.doi: 10.12302/j.issn.1000-2006.202306009
武文杰1(), 吴朝明2, 朱骊2, 王琳棋2, 戈禹2, 张潭3, 刘自强1,*(
)
收稿日期:
2023-06-09
修回日期:
2023-10-02
出版日期:
2024-11-30
发布日期:
2024-12-10
通讯作者:
*刘自强(liuzistrong@njfu.edu.cn),副教授。作者简介:
武文杰(wuwenjie000826@163.com)。
基金资助:
WU Wenjie1(), WU Chaoming2, ZHU Li2, WANG Linqi2, GE Yu2, ZHANG Tan3, LIU Ziqiang1,*(
)
Received:
2023-06-09
Revised:
2023-10-02
Online:
2024-11-30
Published:
2024-12-10
摘要:
【目的】基于全球气候变化背景下极端天气事件频发对植物水分利用的影响,探讨不同降水条件下南方丘陵区混交林树种对水分来源的适应性变化,为科学实施森林精准经营管理措施提供理论依据。【方法】采集不同降水量梯度下南方丘陵区麻栎(Quercus acutissima)和马尾松(Pinus massoniana)混交林的土壤和植物同位素样品,借助多元线性混合模型,对比分析不同降水梯度下麻栎和马尾松的水分利用来源。【结果】①麻栎在无降水时主要利用[10,30) cm土层的水分,利用率为62.0%;随着降水量的增加,其水源转向[80,100) cm土层的水分和地下水,大雨条件下的利用率分别为34.2%和44.6%。②马尾松在无降水时主要利用地下水和[80,100) cm土层水分,利用率分别为21.2%和21.1%;随降水量增加其水分来源逐渐向(0,10) cm和[10,30) cm土层转移,利用率分别为27.2%和53.3%。【结论】麻栎和马尾松的水分来源对降水的适应性不同,不同降水梯度下两者对土壤水分利用深度能较好地互补。在极端降水频发条件下,不同的水分利用模式有利于减少树种间水分竞争。
中图分类号:
武文杰,吴朝明,朱骊,等. 南方丘陵区典型混交林树种水分来源对降水的适应性[J]. 南京林业大学学报(自然科学版), 2024, 48(6): 121-128.
WU Wenjie, WU Chaoming, ZHU Li, WANG Linqi, GE Yu, ZHANG Tan, LIU Ziqiang. Adaptation of typical mixed forest species in the southern hilly region to precipitation variation via water source changes[J].Journal of Nanjing Forestry University (Natural Science Edition), 2024, 48(6): 121-128.DOI: 10.12302/j.issn.1000-2006.202306009.
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