Reducing Nitrogen Application and Using Biogas Residues Improve Yield and Nitrogen Use Efficiency in Maize Grown Under Drought Conditions
Excessive chemical fertilizer and low N use efficiency constrain mulched drip irrigated maize production in China’s Hexi Oasis, while livestock manure is underutilized. Recycling biogas residue and slurry offers a solution, but optimal substitution ratios under reduced N remain unknown. We conducted a two year field ex...