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North Dakota research has shown that the best chance of protein enhancement of spring wheat and durum is accomplished by waiting until the end of flowering (post-anthesis) and broadcasting 10 gallons/acre of 28 percent mixed with 10 gallons/acre of water over the wheat in the cool of the day. The addition of some herbicides, fungicides and insecticides may increase the intensity of leaf burn and limit the efficacy of the pesticide application.
About a ½ percent protein increase has been achieved using this method.
Use of low rates of slow-release N products before or after anthesis has not been shown to increase grain protein effectively.
Source: Fertilizing Hard Red Spring Wheat and Durum SF-712, D.
The most important genetic variables in differentiating genotypes for stress tolerance were biomass/stem, stem reserves mobilization efficiency and grain filling rate (GFR).
Essay Intellectual Man Power - Anthesis In Wheat
Balance among traits related to yield maintenance in DP were more important than their high values.
L.) plants have to rely increasingly on remobilization of previously stored assimilates to maintain grain filling.
In two-year field trials, we studied more than 20 agronomic and developmental traits in 61 wheat genotypes (27 F4:5 families, 17 parents used for the crosses and 17 standards), comparing plants that were defoliated (DP) by cutting off all leaf blades 10 days after anthesis with intact control plants (CP).
In both CP and DP plants, a higher contribution was from the LS than from the C.
High peduncle reserve mobilization efficiency, a longer exposed part of the peduncle and larger C storage capacity (through higher parenchyma and/or lower lignified area) were of specific benefit for maintaining grain weight in defoliated plants.