Rotary and subsoiling tillage rotations influence soil carbon and nitrogen sequestration and crop yield

Long-term single tillage causes serious deterioration of land quality and reduction crop yield. Tillage rotation can alleviate the problems caused by long-term tillage. However, effects different rotations are still very limited. A experiment was conducted in North China Plain to evaluate impacts on soil organic carbon (SOC), total nitrogen (STN) There were eight treatments with two main factors: practice (four types: rotary (R, 2002-2017), subsoiling (S, (RS, 2015-2017) (SR, 2015-2017)) straw management (two return (F) removal (0)). RSF treatment yielded highest SOC, at 12.53 g/kg. significantly increased SOC 41.4% compared RF, while SRF reduced 11.1% SF. In addition, STN content 21.7% that under RF. Compared SF, promoted uniform distribution 0-20 cm layer. Among treatments, stock (SOCS) (STNS), which 67.68 t/ha 6.63 t/ha, respectively. RF treatment, greatly SOCS, 31.7%. Both STNS 13.3% 2.3% 2016, annual yield 19.80 t/ha. 2017, SF 21.37 next 20.94 summary, followed combined (RSF) increase The is an effective measure for improving increasing yields Plain.