南京林业大学学报(自然科学版) ›› 2021, Vol. 45 ›› Issue (4): 123-129.doi: 10.12302/j.issn.1000-2006.202001015
王润松1(), 孙源1, 徐涵湄1, 曹国华2, 沈彩芹2, 阮宏华1,*()
收稿日期:
2020-01-05
接受日期:
2020-12-01
出版日期:
2021-07-30
发布日期:
2021-07-30
通讯作者:
阮宏华
基金资助:
WANG Runsong1(), SUN Yuan1, XU Hanmei1, CAO Guohua2, SHEN Caiqin2, RUAN Honghua1,*()
Received:
2020-01-05
Accepted:
2020-12-01
Online:
2021-07-30
Published:
2021-07-30
Contact:
RUAN Honghua
摘要:
【目的】研究施用不同量沼液对杨树人工林细根生物量的影响,为科学利用沼液、优化杨树人工林施肥技术,以及促进杨树人工林可持续经营提供理论依据。【方法】在4种沼液施用量(0、125、250和375 m3/hm2)的杨树人工林长期控制野外实验样地,采用连续土钻法钻取不同土壤深度(0~20,≥20~40和≥40~60 cm)土芯样品;从中分拣出杨树活细根,经清洗、分级、烘干、称量,比较不同处理下的各土层、各径级细根生物量。【结果】0~60 cm土层总细根生物量、各层和各径级细根生物量均随沼液施用量的增加呈下降趋势。与对照相比,施用沼液使总细根生物量减少了18.8%~28.6%,尤其是土壤表层(0~20 cm)细根生物量减少最多,为21.5%~34.8%;1~5级细根生物量分别减少了17.7%~25.9%、8.5%~14.5%、17.6%~27.9%、10.9%~27.3%和24.4%~31.3%。【结论】长期施用沼液对杨树人工林细根生长有显著的抑制作用,且对细根垂直分布和径级分配有明显影响,但其作用机制还需深入研究。
中图分类号:
王润松,孙源,徐涵湄,等. 施用沼液对杨树人工林细根生物量的影响[J]. 南京林业大学学报(自然科学版), 2021, 45(4): 123-129.
WANG Runsong, SUN Yuan, XU Hanmei, CAO Guohua, SHEN Caiqin, RUAN Honghua. Effects of biogas slurry application on fine root biomass of poplar plantations[J].Journal of Nanjing Forestry University (Natural Science Edition), 2021, 45(4): 123-129.DOI: 10.12302/j.issn.1000-2006.202001015.
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