Combining Organic Fertilizer With Controlled-Release Urea to Reduce Nitrogen Leaching and Promote Wheat Yields

• DOI: 10.3389/fpls.2021.802137
• Publication Date: 2021-12-24T14:17:10Z
• Authors: Xiuyi Yang; Chao Zhang; Xiaoli Ma; Qianjin Liu; Juan An; Shujian Xu; Xingyuan Xie; Jibiao Geng
• Keywords: 2. Zero hunger; Plant culture; Plant Science; 04 agricultural and veterinary sciences; 15. Life on land; nitrogen use efficiency; 6. Clean water; SB1-1110; 12. Responsible consumption; organic fertilizer; 13. Climate action; 0401 agriculture, forestry, and fisheries; controlled-release urea; nitrogen leaching; wheat yield

Soil deterioration, low nitrogen use efficiency (NUE), and environmental risks caused by excessive chemical N fertilizer are key factors restricting sustainable agriculture. It is extremely critical to develop effective management strategies that consider both agronomic benefits. From 2017 2019, a field experiment was conducted assess the effects of combinations organic fertilizers (OF, provided at 30, 50, 70% total applied N) controlled-release urea (CU) on NUE, leaching wheat yield compared with CU. The results suggested OF released slowly in early stage showed significant residual effect, while CU quickly first 2 months. substitutes 30-50% increased 4.2-9.2%, 70%OF+30%CU treatment no difference relative treatment. average maximum apparent NUE recovery (50.4%) achieved under 50%OF+50%CU treatment, but partial factor productivity not affected type. As application rate increased, carbon content value decreased. NO3- -N NH4+ concentrations OF+CU treatments were lower before jointing higher from grain-filling mature stages than those mainly concentrated 0-60-cm layer soil substitution, 60-100-cm significantly reduced. Hence, suggest combination synchronizes absorption availability due period soils proved be best strategy for simultaneously increasing production reducing leaching.