Improved Crop Management Achieved High Wheat Yield and Nitrogen Use Efficiency

Cai, Tingyao; Chen, Yongliang; Pan, Junxiao; Ye, Youliang; Miao, Qi; Zhang, Hongyan; Cui, Zhenling

doi:10.1007/s42106-021-00139-3

Cited by 8 publications

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Saudy et al (2020) showed that reducing applied nitrogen fertilizer by 25% could enhance nitrogen use efficiency to about 60% [8], so it is crucial to implement nitrogen fertilizer reduction and efficiency enhancement technologies in Henan Province. While various fertilizer efficiency experiments have been carried out by agricultural technology departments following the implementation of the soil formula fertilization project, experimental data have mainly focused on classical regression analysis [18,19]. Spatial analysis refers to the evaluation of nitrogen productivity during wheat growth at a regional scale.…”

Section: Introductionmentioning

confidence: 99%

Spatial Variability Analysis of Wheat Nitrogen Yield Response: A Case Study of Henan Province, China

Zhao

et al. 2023

Agronomy

View full text Add to dashboard Cite

The overapplication of nitrogen to wheat reduces profits and has adverse environmental consequences. Machine learning techniques are employed to identify the factors that hold the most potential in improving nitrogen recommendations. The database used in our analysis consisted of a formula fertilization project, the second soil census of China, and cultivated land fertility evaluation. The results showed that the wheat nitrogen yield response was mainly concentrated around 1300–2400 kg/ha in Henan Province, with the highest values observed in the southern and eastern regions and the lowest in the northern region. The soil nitrogen content, nitrogen fertilizer, wet nitrogen deposition, dry nitrogen deposition, and soil nitrogen supply capacity were mainly concentrated around 0.65–1.30 g/kg, 173–203 kg N/ha, 15–39 kg N/(ha yr), 7–49 kg N/(ha yr), and 105–150 kg N/ha, respectively. When comparing the spatial distribution of the soil nitrogen content, nitrogen fertilizer, and nitrogen deposition, we found that the soil nitrogen supply capacity emerged as the predominant factor controlling wheat grain production. Soil types, precipitation, and temperature demonstrated a notable positive correlation with the soil nitrogen supply capacity. Given this background, it would be unreasonable to rely solely on the soil nitrogen content as the standard for fertilizer management. Particularly in high-yield fields, our focus should be on preserving optimal soil fertility by placing greater emphasis on the soil nitrogen supply capacity rather than simply reducing fertilizer application during wheat growth.

show abstract