Dynamic of Soil Porosity and Water Content under Tillage during Summer Fallow in the Dryland Wheat Fields of the Loess Plateau in China

The adoption of tillage during summer fallow can effectively store precipitation in and increase the soil water content dryland wheat fields eastern Loess Plateau; however, its influencing mechanism is still unknown. Three measures were implemented 2018, namely, no-tillage (NTF), subsoiling (STF), plough (PTF), to investigate changes porosity different growth periods winter their contribution storage. results showed that total (Pt) at 0.2–0.3 m depth under PTF treatment increased significantly from 5.64% 34.72% compared with STF pre-seeding anthesis 8.67% 11.56% NTF overwintering stage. In period, aeration (Pa) 0.1–0.3 profile 31.59% 73.98% treatment, layer by 82.47% treatment. At stage jointing stage, capillary (Pc) 17.45–17.72% Pt Pa 0–0.1 promoted storage 0.1–1 profile, while Pc 0–0.3 was negatively correlated gravimetric 0.1–0.6 profile. summary, treatments a 0–1 increasing Pa.