修枝和水氮调控对毛白杨生长和深层土壤有效氮分布的短期影响

王亚飞; 祝维; 曲冠博; 丁晓菲; 续可心; 贾黎明

doi:10.12302/j.issn.1000-2006.202503024

王亚飞, 祝维, 曲冠博, 丁晓菲, 续可心, 贾黎明

南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (4) : 155-164.

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南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (4) : 155-164. DOI: 10.12302/j.issn.1000-2006.202503024

第二十八届中国科协年会———全球气候变化下的林草智能设计育种专题（执行主编　曹福亮　范国强　尹佟明　张怀清）
专题报道Ⅱ：氮与碳对人工林土壤性质的影响（执行主编阮宏华姜姜）

修枝和水氮调控对毛白杨生长和深层土壤有效氮分布的短期影响

王亚飞 ¹ ,
祝维 ² ,
曲冠博 ¹ ,
丁晓菲 ¹ ,
续可心 ¹ ,
贾黎明 ¹^,^*

作者信息 +

The short-term effects of pruning and water-nitrogen regulation on the growth of Populus tomentosa and the distribution of available nitrogen in deep soil

Wang Yafei ¹ ,
Zhu Wei ² ,
Qu Guanbo ¹ ,
Ding Xiaofei ¹ ,
Xu Kexin ¹ ,
Jia Liming ¹^,^*

Author information +

文章历史 +

摘要

【目的】明确毛白杨林木生长和林地深层土壤有效氮对修枝和水氮调控的响应机制,为速生树种结构调控技术的优化,以及毛白杨无节材和大径材的可持续经营提供理论参考。【方法】以黄泛平原5年生三倍体毛白杨S86为研究对象,进行不同修枝强度下的滴灌水氮耦合试验,通过监测林木生长特征和0~600 cm土壤有效氮分布情况,分析修枝和水氮调控对毛白杨生长及林地深层土壤有效氮分布的短期影响规律。【结果】①水氮添加对生长季末毛白杨的单株材积、林地蓄积量和林地生产力存在显著影响,而修枝及交互作用并未起到显著的调控作用;相比于不施肥、不灌溉处理(CK),在不修枝和修枝处理下,灌溉施氮处理的林地生产力分别提高了36.51%和51.94%。②5—8月,各处理毛白杨胸径相对增长率逐月降低,林木胸径呈“快—慢”的生长趋势;施肥和灌溉均未改变毛白杨的生长节律,但修枝对胸径累计增量和胸径相对增长率存在显著负向调控作用。③修枝和修枝-水氮协同效应尚未影响[0,600)cm土壤有效氮含量,而氮肥的添加能够增加土壤有效氮含量,尤其对[0,100)cm和[100,200)cm土层影响明显;林地有效氮分布兼具“表聚性”和“深聚性”。【结论】修枝毛白杨后的水氮添加能够抑制修枝带来的负面影响,促进林木个体大小发育和林地生产力的提高,同时补充林地土壤有效氮含量。

Abstract

【Objective】This study aims to clarify the response of Populus tomentosa forest growth and deep soil available nitrogen to pruning and water-nitrogen regulation, and provide theoretical reference for the optimization of efficient structural control technology for fast-growing tree species.【Method】Taking 5-year-old triploid poplar S86 in the Yellow River floodplain as the research object, a drip irrigation water-nitrogen coupling experiment was set up under different pruning intensities. By monitoring the growth characteristics of forest trees and the distribution of available nitrogen in the soil at [0,600)cm, the short-term effects of pruning and water-nitrogen regulation on the growth of P. tomentosa and the distribution of available nitrogen in deep soil were revealed.【Result】(1) Water and nitrogen additions had a significant impact on the individual tree volume, forest volume and annual forest productivity of P. tomentosa at the end of the growing season, but pruning and interaction did not play a significant regulatory role. Under non-pruning and pruning conditions, the annual forest productivity of the irrigated nitrogen treatment was significantly increased by 36.51% and 51.94% compared with the no fertilization or irrigation(CK)treatment. (2) From May to August, the relative growth rate (R_GR) of the diameter at breast height of P. tomentosa under each treatment decreased month by month, and the diameter at breast height of the forest trees showed a “fast-slow” growth trend. Neither fertilization nor irrigation changed the growth rhythm of P. tomentosa, but pruning had a significant negative regulatory effect on the cumulative increase in diameter at breast height and R_GR. (3) Pruning and pruning-water-nitrogen interaction effects have not affected the soil available nitrogen content in the [0,600)cm layer, but the addition of nitrogen fertilizer can increase the soil available nitrogen, especially in the [0,100)cm and [100,200)cm soil layers. The distribution of available nitrogen has both “surface aggregation” and “deep aggregation”.【Conclusion】The addition of water and nitrogen after pruning of P. tomentosa can inhibit the negative effects of pruning, promote the individual size development of forest trees and increase annual forest productivity, and at the same time supplement the available nitrogen content of forest soil. This study aims to provide a theoretical reference for the sustainable management of unknotted and large-diameter timber of P. tomentosa.

导出引用

王亚飞, 祝维, 曲冠博, 等. 修枝和水氮调控对毛白杨生长和深层土壤有效氮分布的短期影响[J]. 南京林业大学学报（自然科学版）. 2026, 50(4): 155-164 https://doi.org/10.12302/j.issn.1000-2006.202503024

Wang Yafei, Zhu Wei, Qu Guanbo, et al. The short-term effects of pruning and water-nitrogen regulation on the growth of Populus tomentosa and the distribution of available nitrogen in deep soil[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2026, 50(4): 155-164 https://doi.org/10.12302/j.issn.1000-2006.202503024

中图分类号： S718

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