Dataset Information

Physiological and developmental traits associated with the grain yield of winter wheat as affected by phosphorus fertilizer management.

ABSTRACT: Although researchers have determined that attaining high grain yields of winter wheat depends on the spike number and the shoot biomass, a quantitative understanding of how phosphorus (P) nutrition affects spike formation, leaf expansion and photosynthesis is still lacking. A 3-year field experiment with wheat with six P application rates (0, 25, 50, 100, 200, and 400?kg?P ha^-1) was conducted to investigate this issue. Stem development and mortality, photosynthetic parameters, dry matter accumulation, and P concentration in whole shoots and in single tillers were studied at key growth stages for this purpose. The results indicated that spike number contributed the most to grain yield of all the yield components in a high-yielding (>8 t/ha) winter wheat system. The main stem (MS) contributed 79% to the spike number and tiller 1 (T1) contributed 21%. The 2.7?g?kg^-1 tiller P concentration associated with 15?mg?kg^-1 soil Olsen-P at anthesis stage led to the maximal rate of productive T1s (64%). The critical shoot P concentration that resulted in an adequate product of Pn and LAI was identified as 2.1?g?kg^-1. The thresholds of shoot P concentration that led to the maximum productive ability of T1 and optimal canopy photosynthetic capacity at anthesis were very similar. In conclusion, the thresholds of soil available P and shoot P concentration in whole plants and in single organs (individual tillers) were established for optimal spike formation, canopy photosynthetic capacity, and dry matter accumulation. These thresholds could be useful in achieving high grain yields while avoiding excessive P fertilization.

SUBMITTER: Chen XX

PROVIDER: S-EPMC6851383 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Physiological and developmental traits associated with the grain yield of winter wheat as affected by phosphorus fertilizer management.

Chen Xiu-Xiu XX Zhang Wei W Liang Xiao-Yuan XY Liu Yu-Min YM Xu Shi-Jie SJ Zhao Qing-Yue QY Du Yun-Fei YF Zhang Ling L Chen Xin-Ping XP Zou Chun-Qin CQ

Scientific reports 20191112 1

Although researchers have determined that attaining high grain yields of winter wheat depends on the spike number and the shoot biomass, a quantitative understanding of how phosphorus (P) nutrition affects spike formation, leaf expansion and photosynthesis is still lacking. A 3-year field experiment with wheat with six P application rates (0, 25, 50, 100, 200, and 400 kg P ha<sup>-1</sup>) was conducted to investigate this issue. Stem development and mortality, photosynthetic parameters, dry mat ...[more]

PMID: 31719561

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Dataset Information

Physiological and developmental traits associated with the grain yield of winter wheat as affected by phosphorus fertilizer management.

Publications

Physiological and developmental traits associated with the grain yield of winter wheat as affected by phosphorus fertilizer management.

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