植物研究 ›› 2024, Vol. 44 ›› Issue (1): 86-95.doi: 10.7525/j.issn.1673-5102.2024.01.011
收稿日期:
2023-07-23
出版日期:
2024-01-20
发布日期:
2023-12-27
通讯作者:
张海娜
E-mail:zhanghaina@nit.edu.cn
作者简介:
陈志琪(1999—),男,硕士研究生,主要从事退化生境植被恢复研究。
基金资助:
Zhiqi CHEN, Haina ZHANG(), Jiali LIU, Xianghui LU, Baocheng YANG
Received:
2023-07-23
Online:
2024-01-20
Published:
2023-12-27
Contact:
Haina ZHANG
E-mail:zhanghaina@nit.edu.cn
摘要:
为探究氮添加对稀土矿尾砂地猴樟(Cinnamomun bodinieri)幼苗生长及非结构性碳水化合物(NSC)含量的影响,以1年生猴樟扦插苗为研究对象,选用硝酸铵钙作为氮肥(含N 15%),设置3种氮肥水平(CK(0)、 N1(1.8 g·株-1)、N2(3.6 g·株-1)),分析不同氮添加水平下猴樟幼苗根系生长、生物量分配和NSC等指标的差异,探讨稀土尾砂地猴樟对氮添加的响应。结果发现:稀土尾砂地氮添加均增加了猴樟幼苗不同组织的生物量积累,其中N1处理下叶生物量、冠层生物量分别较N2处理下显著提升了44.75%、57.43%(P<0.05);N2处理下叶比重分别较CK、N1处理显著提升了123.53%、15.85%(P<0.05)。不论是粗根(直径>2 mm),还是细根(直径 ≤2 mm),氮添加均显著增加了植物的根长和根表面积(P<0.05),其中N1处理的促进效果最显著(P<0.05); N2处理下的比根长、比表面积均高于CK与N1,且与CK显著差异(P<0.05)。对NSC来说,N1处理提升了叶、茎中的可溶性糖质量分数,而N2处理下细根NSC质量分数分别比CK、N1显著降低了46.49%、28.61%。综上,在稀土矿尾砂地植被恢复过程中,宜选用1.8 g·株-1硝酸铵钙氮肥对猴樟幼苗进行施肥管理。
中图分类号:
陈志琪, 张海娜, 刘佳丽, 鲁向晖, 杨宝城. 氮添加对稀土尾砂地猴樟幼苗根系生长、生物量分配及非结构性碳水化合物的影响[J]. 植物研究, 2024, 44(1): 86-95.
Zhiqi CHEN, Haina ZHANG, Jiali LIU, Xianghui LU, Baocheng YANG. Effects of Nitrogen Addition on Root Growth, Biomass Allocation and Non-structural Carbohydrate Content of Cinnamomum bodinier Seedlings in Rare Earth Tailings[J]. Bulletin of Botanical Research, 2024, 44(1): 86-95.
表1
不同氮水平对猴樟幼苗生物量的影响
处理 Nitrogen treatments | 叶生物量 Leaf biomass/g | 茎生物量 Stem biomass/g | 根生物量 Root biomass/g | 冠层生物量 Canopy biomass/g | 总生物量 Total biomass/g | 根冠比 Root shoot ratio | 叶茎比 Leaf stem ratio | |
---|---|---|---|---|---|---|---|---|
粗根生物量 Coarse root biomass | 细根生物量 Fine root biomass | |||||||
CK | 1.80±0.21c | 4.75±0.77b | 2.66±0.44b | 1.63±0.19b | 6.55±0.90c | 10.83±1.35b | 0.60±0.07a | 0.38±0.05b |
N1 | 8.87±1.06a | 8.88±0.86a | 5.75±0.80a | 3.25±0.32a | 17.75±1.74a | 26.75±2.62a | 0.55±0.04ab | 1.00±0.10a |
N2 | 6.13±0.44b | 5.15±0.23b | 2.93±0.25b | 1.75±0.14b | 11.28±1.09b | 15.96±0.95b | 0.41±0.02b | 1.19±0.06a |
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