Pecan agroforestry systems improve soil quality by stimulating enzyme activity

PeerJ

article

Zhaocheng Wang¹  Mengyu Zhou¹  Hua Liu¹  Cheng Huang¹  Yuhua Ma¹  Hao xin Ge²  Xiang Ge²  Songling Fu¹ 

[1]School of Forestry and Landscape Architecture, Anhui Agricultural University

[2]Fuyang Xinfeng Seed Industry Co., Ltd.

关键词: Pecan;    Agroforestry;    Soil nutrients;    Enzyme activity;   

DOI  :  10.7717/peerj.12663

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundForest and plantation intercropping are efficient agroforestry systems that optimize land use and promote agroforestry around the world. However, diverse agroforestry systems on the same upper-plantation differently affect the physical and chemical properties of the soil.MethodsThe treatments for this study included a single cultivation (CK) pecan control and three agroforestry systems (pecan + Paeonia suffruticosa + Hemerocallis citrina, pecan + Paeonia suffruticosa, and pecan + Paeonia lactiflora). Soil samples were categorized according to the sampling depth (0–20 cm, 20–40 cm, 40–60 cm).ResultsThe results demonstrated that the bulk density (BD) of soil under the pecan agroforestry system (PPH and PPL) was reduced by 16.13% and 7.10%, respectively, and the soil moisture content (MC) and total soil porosity (TPO) increased. Improvements in the physical properties of the soil under the PPS agroforestry system were not obvious when compared with the pecan monoculture. The soil total phosphorus (TP), total nitrogen (TN), available potassium (AK), and total carbon (TC) increased significantly, while the soil urease (S-UE), alkaline phosphatase (S-AKP), and 1,4-β-N-acetylglucosamines (S-NAG) enzyme activity also increased significantly, following agroforestry. Overall, the pecan agroforestry system significantly improved the physical properties of the pecan plantation soil, enriched the soil nutrients, and increased the activity of soil enzymes related to TC, TN, and TP cycles.

【 授权许可】

CC BY