Response Characteristics and Influencing Factors of the Ecological Stoichiometry of Soil Carbon, Nitrogen and Phosphorus to Conversion of Orchards into Farmlands on the Loess Tableland Area

• Published in: Shui tu bao chi xue bao Vol. 39; no. 2; pp. 289 - 297
• Main Authors: LIU Ruhua, MA Yali, CUI Erliang, QIAO Jiangbo, JIA Xiaoxu, ZHU Yuanjun, SHAO Mingan
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Journal of Soil and Water Conservation 01.04.2025
• Subjects: converting orchards into farmland; ecological stoichiometry; loess tableland area; soil nutrient; soil particle composition
• ISSN: 1009-2242
• DOI: 10.13870/j.cnki.stbcxb.2025.02.012

［Objective］ The Loess Plateau is the largest apple-producing area in China. Due to serious aging of apple trees in recent years, the single variety structure, and the instability of China's grain market, it has become a common phenomenon for orchards to be transformed into farmlands on the Loess Plateau to ensure national food security. In order to study the response characteristics of the ecological stoichiometric ratios to conversion of orchards into farmlands. ［Methods］ Farmlands of 0 year (30 years orchard), 1 year, 3 years and 5 years old was selected as the research objects in this study, with farmlands cultivated with food crops set as the control group (CK). Soil organic carbon (SOC), total nitrogen (TN), and total phosphorus (TP) contents in the soil of 0—100 cm depth (10 cm per layer, a total of 10 layers.) were measured, and their ecological stoichiometric ratios were calculated, and the influencing factors of the ecological stoichiometric ratios were analyzed. ［Results］ 1) With the increase of con