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[Winter wheat yield gap between field blocks based on comparative performance analysis].

Jian Chen1, Zhong-Yi Wang, Liang-Tao Li

  • 1International Research Center of Spatial Ecology, Zhejiang Forestry University, Lin' an 311300, Zhejiang, China. chenjian@126.com

Ying Yong Sheng Tai Xue Bao = the Journal of Applied Ecology
|December 24, 2008
PubMed
Summary
This summary is machine-generated.

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Winter wheat yield gaps in China were analyzed using household survey data. Soil salinity, fertility, and irrigation quality were key limiting factors, alongside crop variety and management practices, indicating potential for improvement through better field management.

Area of Science:

  • Agricultural Science
  • Agronomy
  • Soil Science

Background:

  • Winter wheat cultivation is crucial for food security in China.
  • Understanding yield gaps is essential for optimizing agricultural productivity.
  • Previous studies have highlighted various factors influencing crop yields.

Purpose of the Study:

  • To quantify the yield gap of winter wheat in Quzhou County, China.
  • To identify the key factors contributing to this yield gap.
  • To provide insights for improving winter wheat production through optimized management.

Main Methods:

  • Utilized two-year household survey data (2003-2004).
  • Employed Comparative Performance Analysis (CPA) to assess yield variations.
  • Applied stepwise forward linear multiple regression to model yield determinants.

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Published on: April 17, 2015

Main Results:

  • Significant winter wheat yield gaps (4.2-7.9 t/hm²) were observed, with a variation coefficient of 0.14.
  • A regression model with 8 variables explained 63% of yield variability.
  • Soil salinity, fertility, and irrigation water quality were major limiting factors (52% of yield gap).
  • Crop variety (14%), fertilizer type (14%), disease/pests (10%), planting date (7%), and water pressure (3%) also contributed.

Conclusions:

  • Management practices significantly influence winter wheat yield variability in Quzhou County.
  • Addressing soil conditions, water quality, and crop variety is critical for reducing yield gaps.
  • Optimized field management strategies hold substantial potential for enhancing winter wheat productivity.