Response of Soil NO Emission and Nitrogen Utilization to Organic Matter in the Wheat and Maize Rotation System

Overview

Journal Sci Rep

Specialty Science

Date 2021 Feb 24

PMID 33623087

Citations 1

Authors

Xiaoxiao Shu

Yanqun Wang

Yaling Wang

Yang Ma

Mingxin Men

Yunpu Zheng

Cheng Xue

Zhengping Peng

Christos Noulas

Affiliations

Soon will be listed here.

Abstract

The 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 (NO) 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 NO 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 NO 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.

Citing Articles

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