Effect of Organic Manure Substitution of Synthetic Nitrogen on Crop Yield and N 2 O Emission in the Winter Wheat-Summer Maize Rotation System

• Published in: Huanjing kexue Vol. 39; no. 1; p. 321
• Main Authors: Hou, Miao-Miao, Lü, Feng-Lian, Zhang, Hong-Tao, Zhou, Ying-Tian, Lu, Guo-Yan, Ayaz, Muhammad, Li, Qing-Hui, Yang, Xue-Yun, Zhang, Shu-Lan
• Format: Journal Article
• Language: Chinese
• Published: China 08.01.2018
• Subjects: Agriculture - methods; China; Fertilizers; Greenhouse Gases - analysis; Manure; Nitrogen - chemistry; Nitrous Oxide - analysis; Soil; Triticum; Zea mays; China; N2O emission coefficient; yield; organic nitrogen substitution; N2O emission flux; winter wheat-summer maize cropping system
• ISSN: 0250-3301

Controlling agricultural greenhouse gas emissions, such as N O, is important in mitigating global climate warming. Through monitoring the dynamics of N O emission fluxes, we investigated the effect of organic nitrogen (N) substitution of synthetic N on N O emissions and the yield of winter wheat and summer maize in the Guanzhong Plain of Shaanxi Province, China. The study involved six treatments, consisting of no fertilizer (CK), synthetic N, phosphorus (P), and potassium (K) fertilizers alone (NPK), 75% NPK+25% organic N through manure (25%M), 50% NPK+50% organic N (50%M), 25% NPK+75% organic N (75%M), 100% organic N (100%M). The results showed that the peak value of the N O emission flux appeared after fertilization, rainfall, and irrigation. In the wheat season, the emission flux of N O varied from -1.33 to 144.2 μg·(m ·h) , with the highest peak value in the NPK treatment. In the maize season, the emission flux of N O varied from 88.2 to 1800.1 μg·(m ·h) , and the 50%M treatment showed the highest peak va