杨树人工林类型对土壤磷组分的影响

doi:10.13292/j.1000-4890.202106.015

生态学杂志 ›› 2021, Vol. 40 ›› Issue (6): 1549-1556.doi: 10.13292/j.1000-4890.202106.015

杨树人工林类型对土壤磷组分的影响

王亚茹^1,2,林鑫宇^1,2,惠昊^1,2,孙晓丹^1,2,陈斌^1,2,潘昱阳^1,2,陈建伟³,关庆伟^1,2*

（¹南方现代林业协同创新中心, 南京 210037; ²南京林业大学生物与环境学院, 南京 210037; ³江苏三和园艺有限公司, 江苏无锡 214000）

出版日期:2021-06-10 发布日期:2021-12-10

Effects of poplar plantation types on soil phosphorus fractions.

WANG Ya-ru^1,2, LIN Xin-yu^1,2, HUI Hao^1,2, SUN Xiao-dan^1,2, CHEN Bin^1,2, PAN Yu-yang^1,2, CHEN Jian-wei³, GUAN Qing-wei^1,2*

(¹Collaborative Innovation Center of Sustainable Forestry in Southern China, Nanjing 210037, China; ²College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China; ³Jiangsu Sanhe Horticulture Co. Ltd, Wuxi 214000, Jiangsu, China)

Online:2021-06-10 Published:2021-12-10

摘要/Abstract

摘要： 磷是亚热带森林生态系统中重要的限制元素，明晰不同杨树人工林类型对土壤磷组分的影响，对亚热带地区杨树人工林的科学经营具有重要意义。本文以杨树纯林、杨树-女贞混交林和杨树-石楠混交林为对象，采用Sui修正后的Hedley磷素分级方法，研究不同杨树人工林类型对0～20、20～40、40～60 cm土层土壤磷组分的影响。结果表明：与杨树纯林相比，两种混交林增加了土壤全磷、总有机磷、速效磷、活性磷（H₂O-Pi、NaHCO₃-Po、NaHCO3_-Pi）和中等活性磷（NaOH-Po、NaOH-Pi）含量，其中，杨树石楠混交林对其影响更大。杨树-女贞和杨树-石楠混交林0～60 cm土层的速效磷含量较杨树纯林分别增加了52.4%、55.3%，而杨树-女贞混交林显著降低了0～20 cm土层中的总无机磷。混交林中，NaOH-Pi含量在0～20 cm土层显著高于杨树纯林，H₂O-Pi、NaHCO₃-Pi含量在20～40 cm土层显著增加，全磷、总有机磷、NaHCO₃-Po含量在0～40 cm土层显著增加。土壤磷组分总体上随土层加深而降低。冗余分析表明，酸性磷酸酶活性、微生物生物量磷和有机碳是影响土壤磷组分变化的主要因子。与杨树纯林相比，乔灌复层混交林有利于提高土壤磷素有效性，缓解亚热带地区人工林生态系统的磷限制。

关键词: 杨树纯林, 混交林, 土壤磷组分, 微生物生物量磷, 酸性磷酸酶

Abstract: Phosphorus is an important limiting nutrient in subtropical forest ecosystems. Clarifying the effects of different poplar plantation types on soil phosphorus fractions is important for the scientific management of poplar plantation in subtropical region. In this study, Populus euramericana pure forest (PE), Populus euramericana +Photinia serrulata mixed forest (PS), and Populuseuramericana+Ligustrum lucidum mixed forest (PL) were selected as the objects. The Hedley phosphorus fraction method modified by Sui was used to examine the effects of different poplar plantation types on soil phosphorus fractions in soil layers of 0-20, 20-40, and 40-60 cm. The results showed that the contents of total phosphorus, total organic phosphorus, available phosphorus, active phosphorus (H₂O-Pi, NaHCO₃-Po, NaHCO₃-Pi) and moderately active phosphorus (NaOH-Po, NaOH-Pi) were higher in the two mixed forests than PE, with stronger effects in PL than PS. The content of available phosphorus in 0-60 cm soil layer of PS and PL was 52.4% and 55.3% higher than that of PE, respectively. Total inorganic phosphorus in 0-20 cm soil layer of PL was significantly decreased. In the 0-20 cm soil layer, the content of NaOH-Pi in the mixed forests was significantly higher than that in the PE, while the contents of H₂O-Pi and NaHCO₃-Pi in the 20-40 cm soil layer and the contents of total phosphorus, total organic phosphorus and NaHCO₃-Po in the 0-40 cm soil layer of both mixed forests were significantly higher than that of the pure forest. The contents of soil phosphorus fractions generally decreased with soil depth. Results of redundancy analysis showed that acid phosphatase activity, soil microbial biomass P and soil total organic carbon were important factors affecting the changes of soil phosphorus fractions. Compared with the pure forest, the multi-layered mixed forest of tree and shrub species can improve soil phosphorus availability and alleviate the phosphorus limitation in subtropical regions.

Key words: pure poplar forest, mixed forest, soil phosphorus fraction, microbial biomass P, acid phosphatase.

王亚茹, 林鑫宇, 惠昊, 孙晓丹, 陈斌, 潘昱阳, 陈建伟, 关庆伟. 杨树人工林类型对土壤磷组分的影响[J]. 生态学杂志, 2021, 40(6): 1549-1556.

WANG Ya-ru, LIN Xin-yu, HUI Hao, SUN Xiao-dan, CHEN Bin, PAN Yu-yang, CHEN Jian-wei, GUAN Qing-wei. Effects of poplar plantation types on soil phosphorus fractions.[J]. Chinese Journal of Ecology, 2021, 40(6): 1549-1556.

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杨树人工林类型对土壤磷组分的影响

Effects of poplar plantation types on soil phosphorus fractions.

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