Physiological maturity in wheat based on kernel water and dry matter.
By Daniele Calderini, L. Abeledo, G. Slafer. 2000
92 citations recorded by the source corpus.
Estimation of the time of physiological maturity could be beneficial to avoid yield penalties due to lodging, sprouting, hail, and other harvest risks. The aim of our study was to evaluate a simple empirical relationship (model) to determine physiological maturity by simultaneously analyzing the water and dry matter dynamics of wheat kernels. An experiment was conducted in which two cultivars with different kernel mass potential were sown on four dates. Fresh and dry kernel mass from different positions in the spike were measured twice weekly. To validate the regression model, measured and calculated data from different cultivars, growing seasons, and kernel positions were compared. A negative linear relationship between kernel dry matter (relative to final kernel mass) and kernel water concentration was determined. This showed that in wheat, physiological maturity is reached at 37% of kernel water concentration. Validation of the regression model was done using data from field experiments in Argentina and Mexico, and from controlled-conditions experiments reported in the literature. The regression model successfully simulated results from field experiments (r = 0.98; P < 0.001). In addition, data from controlled-conditions experiments showed the same negative linear relationship between relative kernel dry matter and kernel water concentration (slope = -0.4), and the model achieved a good fit for measured data (r = 0.96; P <0.001). This regression model is proposed for use by farmers and crop managers, who can simply measure grain humidity with grain moisture meters.
Subfields: Agronomy and Crop Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/7245a931d6e3f65486d02c3041e12461e6eeec73
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Citations in the corpus
- Delayed Harvest Effect on Soft Red Winter Wheat in the Southeastern USA (2006, background): “INTER WHEAT reaches physiological maturity and maximum dry matter yield when the grain is about 37% moisture ( Calderini et al., 2000 ), but at that moisture content the grain is too soft to combine.”
- Seed dry weight response to source–sink manipulations in wheat, maize and soybean: a quantitative reappraisal (2004, background): “7; Swank et al., 1987; Calderini et al., 2000; Borrás et al., 2003).”
- Pseudomonas bacteria and phosphorous fertilization, affecting wheat (Triticumaestivum L.) yield and P uptake under greenhouse and field conditions (2010, unknown): “At physiological maturity, 3 months after seed germination (Calderini et al. 2000), 10 plants per treatment were harvested and data regarding the plant height, number of tillers/m, number of grains/spike, 1,000-grain weight, plus straw and grain yields were recorded.”