期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 472, 期 -, 页码 939-946出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2013.11.117
关键词
Aromatic plants; Intercropping; N cycling; Organic nitrogen; Available nitrogen; Soil microbial activity
资金
- National Natural Science Foundation of China [31171922, 31301736]
- Beijing University of Agriculture [GJB2013004]
Aromatic plants can substantially improve the diversity and structure of arthropod communities, as well as reduce the number of herbivore pests and regulate the abundance of predators and parasitoids. However, it is not clear whether aromatic plants are also effective in improving soil quality by enhancing nutrient cycling. Here, field experiments are described involving intercropping with aromatic plants to investigate their effect on soil nitrogen (N) cycling in an orchard ecosystem. The results indicate that the soil organic nitrogen and available nitrogen contents increased significantly in soils intercropped with aromatic plants. Similarly, the activities of soil protease and urease increased, together with total microbial biomass involved in N cycling, including nitrifying bacteria, denitrifying bacteria and azotobacters, as well as the total numbers of bacteria and fungi. This suggests that aromatic plants improve soil N cycling and nutrient levels by enriching the soil in organic matter through the regulation of both the abundance and community structure of microorganisms, together with associated soil enzyme activity, in orchard ecosystems. (C) 2013 Elsevier B.V. All rights reserved.
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