Author:
Shu Xiaoxiao,Wang Yanqun,Wang Yaling,Ma Yang,Men Mingxin,Zheng Yunpu,Xue Cheng,Peng Zhengping,Noulas Christos
Abstract
AbstractThe appropriate nitrogen (N) fertilizer regulator could increase N utilization of crops and reduce N losses in the North China Plain. We investigated the effects of reduced inorganic-N rate combined with an organic fertilizer on nitrous oxide (N2O) emissions in winter wheat and summer maize rotation system. Simultaneously studied the effect of different treatments on N use efficiency (NUE), N balance and net income. After reducing the amount of nitrogen fertilizer in the wheat-corn rotation system, the results showed that the cumulative emission of soil N2O from the RN40% + HOM [40% of RN (recommended inorganic-N rate) with homemade organic matter] treatment was 41.0% lower than that of the RN treatment. In addition, the N production efficiency, agronomic efficiency, and apparent utilization were significantly increased by 50.2%, 72.4% and 19.5% than RN, respectively. The use of RN40% + HOM resulted in 22.0 and 30.1% lower soil N residual and N losses as compared with RN. After adding organic substances, soil N2O cumulative emission of RN40% + HOM treatment decreased by 20.9% than that of the HAN (zinc and humic acid urea at the same inorganic-N rate of RN) treatment. The N production efficiency, N agronomic efficiency and NUE of RN40% + HOM treatment were 36.6%, 40.9% and 15.3% higher than HAN’s. Moreover, soil residual and apparent loss N were 23.3% and 18.0% less than HAN’s. The RN40% + HOM treatment appears to be the most effective as a fertilizer control method where it reduced N fertilizer input and its loss to the environment and provided the highest grain yield.
Funder
National Key Research and Development Program of China “Integrated research and demonstration of fertilizer and pesticide reduction technology for winter wheat in Beijing, Tianjin and Hebei
Hebei Key Research and Development Program
Hebei Talent Engineering Training Support Project
Natural Science Basic Research Program of Shaanxi
National Key Research and Development Program of China “Topsoil regulation and soil fertility improvement of the wheat-maize field in northern of Huang-Huai-Hai”
Publisher
Springer Science and Business Media LLC
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