Establishing High-Yielding Maize System for Sustainable Intensification in China

Qingfeng Meng, Zhenling Cui, Haishun Yang, Fusuo Zhang, Xinping Chen

Research output: Chapter in Book/Report/Conference proceedingChapter

23 Scopus citations

Abstract

Although importance of high-yielding maize system for food security has been extensively studied and discussed worldwide, more must be done in the context of improving yield while simultaneously reducing agricultural environmental costs to achieve sustainable intensification (SI). Using China's maize production as an example, we discussed the system with equal emphasis on high yield and high nitrogen (N) use efficiency in regards to SI. Through yield potentials and gaps analysis with the help of crop modeling, the high-yielding maize system was designed and developed to make maximum use of solar energy and growing season with favorable temperatures via genetics × environment × management (G × E × M) interactions. In this high-yielding system compared with the low-yielding traditional farmers system, total dry matter increased with stable harvest index, aboveground plant N uptake requirement per grain yield deceased largely, and the percentage of the dry matter and N accumulation during the middle-late growing season increased significantly. Accordingly, an in-season root-zone N management was developed for high-yielding maize system to match the total N requirement by crop in application amount, placement, and timing for nonlimiting N supply with minimum losses to the environment. The high-yielding system showed great potential for SI which reduced N2O and other greenhouse gas emission intensity by 10%–30%. Moreover, we suggest future research direction for high-yielding maize system to address multiply challenges in a changing world including climate change, resource depletion and shortage, and soil constrains and degradation to ensure food security.

Original languageEnglish (US)
Title of host publicationAdvances in Agronomy
EditorsDonald L. Sparks
PublisherAcademic Press Inc.
Pages85-109
Number of pages25
ISBN (Print)9780128151792
DOIs
StatePublished - 2018

Publication series

NameAdvances in Agronomy
Volume148
ISSN (Print)0065-2113

Keywords

  • Environmental cost
  • High yielding
  • Maize
  • Nitrogen
  • Sustainable intensification
  • System approach

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Soil Science

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