Effects of Amendments on Physicochemical Properties and Respiration Rate of Soil from the Arid Region of Northwest China

In arid regions, decreased soil fertility has adversely affected agricultural sustainability. The effects of different amendments in alleviating these issues and increasing remain unclear. Herein, a two-year field experiment was conducted to evaluate the properties grey desert respiration (SR) dynamics under six treatment groups: biochar (BC), leonardite (LD), anionic polyacrylamide (PAM−), cationic (PAM+) powder, solution water (PAM−W), control (CK). We observed that BC LD significantly altered pH, organic matter, available nitrogen, phosphorus, cation exchange capacity, SR. PAM amendment increased SR as compared control, except autumn, but did not affect properties. showed strong seasonal patterns, highest lowest rates were June January, respectively. Amendments SR, no interaction between factors. Temporal variation substantially influenced by temperature at 15 cm depth. Temperature sensitivity (Q10) with depth addition. temperature, moisture, air their interactions. outcomes this study suggested improved negated net carbon accumulation Q10 agriculture soil.