Biochar Amendment Combined with Straw Mulching Increases Winter Wheat Yield by Optimizing Soil Water-Salt Condition under Saline Irrigation

The freshwater deficit is the major constraint to winter wheat production. Saline water irrigation could alleviate stress while increasing risk of soil salinization, which would result in yield reduction due additional salt stress. objective present study explore effect a straw-returning mode promote production under saline irrigation. A field experiment was conducted during growing seasons 2017–2018 and 2018–2019. Four returning modes were set, based on an equivalent carbon input: straw mulching (SM), biochar amendment (BA), combined with (SM+BA), control without (CK), along three salinity levels water: 0.47 dS m?1 (I0, freshwater), 3.25 (I1), 6.75 (I2). alone triggered accumulation reduced grain by 9.43––18.19%. Returning fields increased organic content 16.41––52.21% decreased bulk density 0.69––1.46%. highest increase (16.60––21.80%) always obtained when using treatment SM+BA, moisture (3.15––12.31%) lower (24.79––44.29%) compared CK. results established that SM+BA provided better water–salt conditions nutrient environment for growth than single treatment. Thus, application SM BA shown be proper mitigating strategy cope adverse effects sustainable use