| To explore the regulation effect of adding conditioner on the physical and chemical properties of soil and potato yield. In this study, the main processed potato varieties in Bashang area of Zhangjiakou, Setting up the traditional fertilization (CK, 10%, 10%, 55%, 25%) and proportion of different growth periods (T1, 10%,30%,40%,20%; T2, 20%,40%,30%,10%; T3, 30%,30%,40%,0%; T4, 30%,40%,30%,0%; T5, 30%,50%,20%,0%; T6, 30%,70%,0%,0%; T7, 20%,80%,0%,0%; T8, 10%, 90%, 0%, 0%) for the nine treatments, Its effects on soil water holding capacity, water stability aggregate distribution and soil nutrient and yield were analyzed. Compared with conventional fertilization measures, different fertilizer ratio add conditioner are significantly increased the 0~60 cm soil water capacity (saturated water, wool water, field water) and organic matter, total nitrogen, quick phosphorus, quick potassium content, increased 0~100 cm soil water volume and potato yield, reduce the soil bulk, including soil physical properties and potato yield to T4 effect, soil nutrient content to T1, T2. Studies on the structure of water stability aggregates in different soil layers show that, All treated water stable aggregates were mainly 0.25~1 mm and 0.053~0.25 mm, Compared with CK, T4 treatment significantly increased the proportion of 0-60 cm> 0.25 cm, the average mass diameter (MWD, mean weight diameter), Geometric mean diameter (geometric mean diameter, GMD), Increased by 76.27% to 162.91%, 55.77% to 332.69%, and 95.24% to 531.25%, respectively, And, as the depth of the soil layer increases, R0.25, MWD and GWD all showed a trend of increasing first and then decreasing. To sum up, adjust the proportion of potato fertility fertilizer add conditioner at the same time, to improve the soil physical and chemical properties, improve the potato yield effect, T4 fertilization mode can effectively improve the soil physical structure and water storage and improve potato yield, thus in improve fertilizer utilization, ensuring food security has application prospects. |