A b s t r a c t A r t i c l e I n f oThe objective of this study was to evaluate the effect of nitrogen fertilization and fungicide application on yield, grain protein concentration and kernel plumpness on malting barley. Eleven experiments were replicated in Buenos Aires province, Argentina, during years 2012 and 2013. Treatments were: 1. Control; 2. 80 kg N ha -1 applied at tillering; 3. treatment 2 plus a foliar application of 20 kg N ha -1 at Z38; 4. treatment 3 plus a foliar application of fungicide at Z38; and 5.treatment 4 plus a foliar application of fungicide at second detectable node. Nitrogen applied at tillering increased yields at the sites where soil N availability was below 100 kg N ha -1 , increased grain protein and decreased kernel plumpness on sites where kernel plumpness in the control plots was <75%. An extra foliar N fertilization did not affect yield or kernel plumpness, but increased grain protein concentration significantly 0.82 percentage points in 45% of the studied site-years. Fungicide application at Z38 increased yield and kernel plumpness in 2012, when high moisture conditions promoted fungal diseases. An extra fungicide application at second node stage had no consistent effect on the studied variables.
Seed protein concentration in argentine soybean has been steadily decreasing in the last decade and is causing severe losses to the soy milling industry. Thirty-one field trials were conducted in the Pampean region of Argentina during four seasons to evaluate the effect of different fertilization strategies-1: Control without fertilization, 2: P (22 kg ha -1 ); 3: P+S (22 kg ha -1 P and 13 kg ha -1 S); 4: PP+SS (40 kg ha -1 P and 24 kg ha -1 S); 5: P+S + Zn (T3 + 1,25 kg ha -1 Zn); 6: P+S + foliar B ( T3 + 0,1 kg ha -1 B) and 7: P+S + foliar N (T3 + 10 kg ha -1 N) on soybean yield, seed protein concentration (PC), seed oil concentration (OC) and profat index (PF). In most site-years (58,1%), positive yield and protein responses were observed with PP+SS vs Control treatment, resulting in the largest response magnitudes compared to the rest of the treatments. Treatments with foliar N, preplant broadcast Zn and foliar B applications over T3 had no consistent effects on the studied variables. This study shows that proper fertilization strategies can increase soybean yield and seed quality.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.