Abstract:

The study aims to clarify the soil fertility status of the brown soil peanut production area in southeastern Shandong, and provide reference for the management of soil nutrient resources in the peanut production area. The soil samples of peanut production area in Yinan County, a typical brown soil, were selected to determine soil bulk density, pH and various nutrient components. The results showed that the brown soil farmland in the peanut production area of southeastern Shandong was mainly composed of poorly permeable plots, with poor soil aggregate structure and low permeability; it was mostly acidic or slightly acidic, with severe soil acidification; organic matter, phosphorus and calcium content were relatively abundant; nitrogen supply capacity was moderate, but with small capacity, potential for nitrogen nutrition was lacking; the potassium supply intensity was relatively small, the potential was too low, and the potential potassium nutrition was severely lacking; effective manganese was lacking, effective boron was moderate, while the content of effective copper, effective zinc, effective iron, and effective molybdenum were relatively abundant. Among the six main evaluation indicators that directly affect peanut growth, except for pH and available potassium level at level 4 and available nitrogen level at level 3, other three indicators were all at level 2. The distribution of nutrients in brown soil in southeastern Shandong was uneven, with severe acidification of farmland, moderate nitrogen nutrients, severe potassium deficiency, and abundant phosphorus and calcium nutrients. Through deep tillage and loosening of the soil, supplementing nitrogen, increasing potassium fertilizer application, formula fertilization and other agricultural measures, the active soil layer was thickened, the fertilizer and water retention capacity was improved, and the soil environment was improved, which was more suitable for the growth and development of peanuts. The brown soil in this area also had trace element conditions that were conducive to improving peanut yield and quality, making it a fertile soil for peanut production.

Key words: Southeast Shandong, peanuts, peanut production area, brown soil, nutrient distribution, soil nutrient management, soil fertility, fertility evaluation, agricultural practices