METHOD OF PROGNOSIS OF PROTEIN CONTENT IN WINTER WHEAT GRAINS OF FUTURE YIELD DURING PLANT VEGETATION Russian patent published in 2000 - IPC

FIELD: agriculture, plant growing. SUBSTANCE: method involves sampling plant biomass from analyzed site at the phase of "spring tillering-onset of booting" where total content of nitrogen (as % of absolutely dry matter), phosphorus and potassium content in sample, nitrogen and phosphorus doses in fertilizers added in autumn are determined. Grain protein content is measured by the formula: Y (%) = 13.7-0.00922 d₁ + 0.58478 d₃ - 2.70180 d₄ - 0.01864 d_1,3 + 0.00701 d_1,5 - 0.01350 d_2,4 - 1.44354 d_3,4 + + 0.48519 d_3,5 + 1.09522 d_4,5 where: d_(1...5) - difference between level of factor effecting on protein accumulation x_(1...5) and constant of the same factor k_(1...5), i. e. d = x - K; Y - grain protein content of future yield, %; X₁ - amount of nitrogen fertilizers added in autumn (kg/ha); X₂ - amount of phosphorus fertilizers added in autumn (kg/ha); X₃ - concentration of total nitrogen in biomass at the phase "spring tillering-onset of booting" (at stage IV of organogenesis), %; X₄ - concentration of total phosphorus in biomass at stage IV of organogenesis, %; X₅ - concentration of total potassium in biomass at stage IV of organogenesis, %; K₁-K₅ - level of constants of factors, namely: K₁ - amount of nitrogen fertilizers = 54.43; K₂ - amount of phosphorus fertilizers = =54.46; K₃ - concentration of nitrogen in sample = 4.23; K₄ - concentration of phosphorus in sample = 1.06; K₅ - concentration of potassium in sample = 4.07. EFFECT: improved precision of prognosis of grain protein content in future yield. 2 tbl