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Balanced N and C input recommendations for rain-fed maize production in northern China based on N balances and grain yields

TitleBalanced N and C input recommendations for rain-fed maize production in northern China based on N balances and grain yields
Publication TypeJournal Article
Year of Publication2018
AuthorsWang, X, Cai, D, Zhao, Q, Xie, X, Hoogmoed, WB, Oenema, O
JournalJ Sci Food Agric
Volume98
Pagination872-883
Date PublishedFeb
ISBN Number0022-5142
Accession Number28686304
KeywordsAgriculture, Animals, carbon, Carbon/analysis/metabolism, Cattle, China, dryland, Fertilizers/*analysis, maize, Manure, nitrogen, Nitrogen/analysis/*metabolism, Rain, rain-fed farming, Soil/chemistry, Zea mays/chemistry/*growth & development/*metabolism
Abstract

BACKGROUND: This study aimed to assess longer-term (1993-2009) effects of combined applications of fertiliser, maize stover, and cattle manure on maize yields, partial nitrogen (N) and carbon (C) balances, and water and N-use efficiencies, to guide N and C input recommendations for rain-fed maize production in northern China. RESULTS: The field trial, with three factors at five levels and 12 treatments, was conducted at Shouyang Dryland-Farming Experimental Station, Shanxi, China. Data analysis revealed higher N balances but lower C balances significantly occurred in a dry year than in a wet year. Positive N balances related to higher N inputs resulted in higher soil available N, even downward to deep layers with increasing N inputs, while positive C balances due to higher C inputs could be benefit to increase soil organic C. Based on partial N balances and grain yields, N and C inputs at ranges of 100 kg N ha(-1) and 1.9-2.9 Mg C ha(-1) could be recommended for target yields of 6.7-7.2 Mg ha(-1) in rain-fed maize production. CONCLUSION: The study suggests that N balances close to neutral be given priority to improving N-use efficiency, and more positive C balances also be important for sustaining target yields and soil fertility levels. (c) 2017 Society of Chemical Industry.