26年集约经营山核桃林对土壤有机碳和肥力的影响。

Effect of 26 years of intensively managed Carya cathayensis stands on soil organic carbon and fertility.

作者信息

Wu Jiasen, Huang Jianqin, Liu Dan, Li Jianwu, Zhang Jinchi, Wang Hailong

机构信息

College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China ; Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang Agricultural and Forestry University, Lin'an, Zhejiang 311300, China.

Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration, Zhejiang Agricultural and Forestry University, Lin'an, Zhejiang 311300, China.

出版信息

ScientificWorldJournal. 2014 Jan 15;2014:857641. doi: 10.1155/2014/857641. eCollection 2014.

DOI:10.1155/2014/857641

PMID:24558339

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3914327/

Abstract

Chinese hickory (Carya cathayensis), a popular nut food tree species, is mainly distributed in southeastern China. A field study was carried out to investigate the effect of long-term intensive management on fertility of soils under a C. cathayensis forest. Results showed that after 26 years' intensive management, the soil organic carbon (SOC) content of the A and B horizons reduced by 19% and 14%, respectively. The reduced components of SOC are mainly the alkyl C and O-alkyl C, whereas the aromatic C and carbonyl C remain unchanged. The reduction of active organic matter could result in degradation of soil fertility. The pH value of soil in the A horizon had dropped by 0.7 units on average. The concentrations of the major nutrients also showed a decreasing trend. On average the concentrations of total nitrogen (N), phosphorus (P), and potassium (K) of tested soils dropped by 21.8%, 7.6%, and 13.6%, respectively, in the A horizon. To sustain the soil fertility and C. cathayensis production, it is recommended that more organic fertilizers (manures) should be used together with chemical fertilizers. Lime should also be applied to reduce soil acidity.

摘要

山核桃（Carya cathayensis）是一种广受欢迎的坚果类食用树种，主要分布于中国东南部。开展了一项田间研究，以调查长期集约经营对山核桃林下土壤肥力的影响。结果表明，经过26年的集约经营，A层和B层土壤有机碳（SOC）含量分别降低了19%和14%。SOC减少的组分主要是烷基碳和O-烷基碳，而芳香碳和羰基碳保持不变。活性有机质的减少可能导致土壤肥力下降。A层土壤的pH值平均下降了0.7个单位。主要养分的浓度也呈下降趋势。在A层中，测试土壤的全氮（N）、磷（P）和钾（K）浓度平均分别下降了21.8%、7.6%和13.6%。为维持土壤肥力和山核桃产量，建议将更多有机肥（粪肥）与化肥一起使用。还应施用石灰以降低土壤酸度。