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THE USE OF THE NITRIFICATION INHIBITOR, ETRIDIAZOLE, AS AN AID TO INCREASING GRAIN YIELD IN FIELD CROPS IN SOUTHEAST NEBRASKA
Abstract
Fifteen field experiments were conducted (1977-1981) to evaluate the effects of the nitrification inhibitor (NI), etridiazole, on the grain yield of wheat (Triticum aestivum L. em Thell), oats (Avena sativa L.), corn (Zea mays L.) and sorghum (Sorghum bicolor (L.) Moench). Rates of etridiazole, rates of nitrogen and three forms of nitrogen (urea, urea-ammonium nitrate solutions, anhydrous ammonia) were varied to determine the treatment combinations which produced the most efficient use of applied nitrogen and the maximum yield. Fourteen of the experiments were conducted at the University of Nebraska Field Laboratory at Mead, NE on Sharpsburg silty clay laom (Typic Argiudoll) soil. Five of these experiments measured residual effects. One of these experiments was conducted at Grand Island, NE on a Cass fine sand (coarse loamy mixed mesic Fluventic Haplastol). Soil test results showed increase in soil nitrogen in treatments with applied nitrogen three years out of the four experiments where appropriate soil analyses were made. In three years total nitrate nitrogen (NO(,3)-N) increased over the non-treated controls. In one year ammonium (NH(,4)-N) increased over the non-treated controls. In none of the years was there an increase in soil nitrogen level due to the use of etridiazole. Yields were increased by nitrogen application fertilizer in four of the 10 first year experiments. Corn was the only crop that showed positive yield response to applied nitrogen. In four of the six first-year corn experiments, nitrogen additions increased yield above the control. In two of these experiments there was no increase in yield after the first increment of nitrogen. In one experiment the nitrogen applications decreased yields below the control. Percent nitrogen in the grain and stover showed the effects of nitrogen additions more than did the grain yields. The application of NI did not increase grain yield or stover weight in a consistent manner. There were increases in one experiment when the chemical was combined with anhydrous ammonia. When etridiazole was compared to nitrapyrin no differences due to chemical was detected in the effects on yield.
Subject Area
Agronomy
Recommended Citation
SHAPIRO, CHARLES ALAN, "THE USE OF THE NITRIFICATION INHIBITOR, ETRIDIAZOLE, AS AN AID TO INCREASING GRAIN YIELD IN FIELD CROPS IN SOUTHEAST NEBRASKA" (1982). ETD collection for University of Nebraska-Lincoln. AAI8227041.
https://digitalcommons.unl.edu/dissertations/AAI8227041