Journal article
The spike weight contribution of the photosynthetic area above the upper internode in a winter wheat under different nitrogen and mulching regimes
The Crop Journal, Vol.7(1), pp.89-100
2019
Abstract
Besides leaves, non-foliar green organs such as stem and spike are also considered photosynthetic organs. To assess the photosynthetic contributions of these organs, the correlations between these photosynthetic areas and single-spike weight were investigated in a winter wheat (Triticum aestivum L.) under four nitrogen and mulching treatments: N120, N150, N195, and N195 + M. Two-year repeated field experiments were conducted on the Loess Plateau of China. Non-foliar photosynthetic area, grain-filling ratio and duration, grain yield, and in particular, single-spike weight, were measured, recorded and analyzed. Under the N195 + M treatment, plants showed the largest area of photosynthetic organs (flag leaf and non-foliar organs) and the highest grain yield and single spike weight. Single-spike weight was positively correlated with the areas of all examined non-foliar photosynthetic organs, in particular with the area above the flag leaf node (R2 = 0.761⁎) and the area above the exposed part of the peduncle (EXP) (R2 = 0.800⁎⁎). In addition, single-spike weight was highly correlated with average grain-filling ratio (R2 = 0.993⁎⁎), whereas it was less highly correlated with grain-filling duration (R2 = 0.533). The morphological traits of non-foliar photosynthetic organs were also more highly correlated with average grain-filling ratio than with average grain-filling duration. The significant correlation between each of the morphological traits (area, length and width) of EXP and single-spike weight indicates that morphological traits of EXP are important in determining spike weight in the Loess Plateau environment.
Details
- Title
- The spike weight contribution of the photosynthetic area above the upper internode in a winter wheat under different nitrogen and mulching regimes
- Authors/Creators
- W. Chen (Author/Creator) - Baoji University of Arts and SciencesJ. Zhang (Author/Creator) - Murdoch UniversityX. Deng (Author/Creator) - Institute of Soil and Water Conservation
- Publication Details
- The Crop Journal, Vol.7(1), pp.89-100
- Publisher
- Elsevier B.V.
- Identifiers
- 991005542688907891
- Copyright
- © 2018 Crop Science Society of China and Institute of Crop Science, CAAS
- Murdoch Affiliation
- School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
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- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.4 Crop Science
- 3.4.424 Crop Yield Optimization
- Web Of Science research areas
- Agronomy
- Plant Sciences
- ESI research areas
- Agricultural Sciences