MAISTER HERBICIDE RESIDUES IN BROWN MEADOW SOIL AND ITS AFTEREFFECT
Abstract
A study was carried out under conditions of the vegetation house in 2012 and in the experimental fields in Primorye in 2013, 2015, and 2016. Soils were brown meadow podzolized, containing 3.5 percent of humus in the arable horizon. The sensitivity to MaisTer herbicide was studied in 12 agricultural crops. It was found that beet, cucumber, carrot, cabbage, tomato, radish and buckwheat showed high sensitivity to active ingredients of MaisTer herbicide (foramsulfuron + iodosulfuron). A dose reducing the weight of these test crops by 50% was 0.1–6.0 g a.i./ha. For rice, mustard, barley, soybean and wheat, this figure was from 13.0 to 20.5 g a.i./ha, significative of their high sensitivity to MaisTer herbicide. The data on tolerance for herbicide residues in brown meadow soil that fluctuate from 0.003 to 14.8 g a.i./ha depending on a crop, confirm this conditional gradation of crops as to sensitivity signs. It was found that 3 of 5 agricultural crops (mustard, buckwheat and beet) used as test plants showed the presence of residues of MaisTer herbicide active ingredients in brown meadow soil. Four months after applying herbicide in consumption rate of 150 g/ha (46.5 g a.i./ha), 7.4–9.3 g a.i./ha, or 16–20%,remained in soil; at consumption rate of 300 g/ha (93 g a.i./ha), 10.5–10.9 g a.i./ha, or 11–12%, remained in soil. Eleven months later, 2.8–3.7% of herbicide active ingredients may persist in brown meadow soil. Next year, when growing buckwheat and soybean in the experimental land plot treated with MaisTer herbicide, no aftereffect on the plants and yields of these crops was revealed, even in consumption rates doubling the recommended one. The yields of buckwheat green mass and soybean seeds did not significantly differ from those in the herbicide-free variant.
About the Authors
A. V. KOSTYK
Far Eastern Research Institute of Plant Protection
Russian Federation
Russian Federation
42a, Mira St, Kamen-Rybolov, Khankaiskiy District, Primorsky Territory, 692682, Russia
Candidate of Science in Agriculture, Laboratory Head
N. G. LUKACHEVA
Far Eastern Research Institute of Plant Protection
Russian Federation
Russian Federation
42a, Mira St, Kamen-Rybolov, Khankaiskiy District, Primorsky Territory, 692682, Russia
Candidate of Science in Agriculture, Senior Researcher
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Review
For citations:
KOSTYK A.V., LUKACHEVA N.G. MAISTER HERBICIDE RESIDUES IN BROWN MEADOW SOIL AND ITS AFTEREFFECT. Siberian Herald of Agricultural Science. 2017;47(4):26-31. (In Russ.)
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