Effects of substituting partial chemical fertilizer nitrogen with bio-organic fertilizer nitrogen on maize yield, nutrient utilization and nitrogen use efficiency

doi:10.14088/j.cnki.issn0439-8114.2026.04.016

Abstract

Abstract: To investigate the effects of substituting partial chemical fertilizer nitrogen with organic fertilizer nitrogen on maize (Zea mays L.) yield components, nutrient uptake and nitrogen fertilizer utilization, a randomized block experiment was conducted. Six treatments were established: no fertilization (CK0), 100% chemical fertilizer (CK, 225 kg/hm² pure nitrogen), 90% chemical fertilizer+ 10% bio-organic fertilizer (10%OF), 80% chemical fertilizer + 20% bio-organic fertilizer (20%OF), 70% chemical fertilizer + 30% bio-organic fertilizer (30%OF), and 60% chemical fertilizer + 40% bio-organic fertilizer (40%OF). The total applied amounts of nitrogen, phosphorus and potassium nutrients were consistent across all fertilization treatments. The effects of different combined application ratios of chemical fertilizer nitrogen and organic fertilizer nitrogen on maize growth and development, yield, nutrient uptake and fertilizer utilization efficiency were investigated. The results showed that the combined application of bio-organic fertilizer and chemical fertilizer promoted maize growth, improved ear characteristics, increased yield, and enhanced nutrient uptake in maize. Compared with the CK treatment, kernel number per row increased by 3.12%-10.91%, 100-kernel weight increased by 1.13%-3.13%, yield increased by 5.17%-14.28%, grain nitrogen uptake increased by 5.38%-14.80%, grain phosphorus uptake increased by 25.12%-65.16%, grain potassium uptake increased by 3.34%-19.80%, and the apparent nitrogen use efficiency increased by 14.97%-41.10%. Among all treatments, the combination of 20% bio-organic fertilizer and 80% chemical fertilizer was most effective in improving plant nutrient uptake capacity, achieving the highest yield increase rate and nitrogen use efficiency.

Key words: bio-organic fertilizer, chemical fertilizers, maize (Zea mays L.), yield, nutrient utilization, nitrogen use efficiency

CLC Number:

S513

REN Dong-xue, DING Gui-jiang, MU Yun-sen, LI Yi, YANG Zhi-hui, LI Qing-song, LIU Mei-yan, LIANG Qiu-hua. Effects of substituting partial chemical fertilizer nitrogen with bio-organic fertilizer nitrogen on maize yield, nutrient utilization and nitrogen use efficiency[J]. HUBEI AGRICULTURAL SCIENCES, 2026, 65(4): 96-101.

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