Effects of plough layer construction on soil three phase rate and root morphology of spring maize in northeast China

Abstract

Establishing reasonable plough layer construction is regarded as one of important methods for solving some rainfed farmland problems, which is of great significance in the dryland of northern China. The experiment was conducted with four tillage treatment, including furrow loose and ridge compaction plough layer (FLRC), all loose plough layer (AL), all compaction plough layer (AC), up loose and down compaction plough layer (ULDC, CK), at Fuxin National Agricultural Environmental Science Observation Experimental Station, at which the long-term plough layer construction position fixed experiment began in 2009. The data in 2015 and 2016 showed that the FLRC treatment optimized ( P 0−10 cm soil layer was optimized by AC treatment before spring corn sowing, while in 10−30 cm soil layer was optimized by FLRC and AL treatments. After the spring corn was harvested, the soil three phase’s rate in 20−30 cm soil layer in FLRC and AL treatments was better than that in ULDC and AC treatments. Compared with the ULDC treatment, FLRC treatment increased ( P P P P