Biological Responses To Clomazone Drift And Its Resolving Strategy In Spring Wheat

Wheat output of the second as the world food crops, in grain production occupies an important position. Takes place every year in wheat on also common occurance phytotoxicity, which has a serious impact shift herbicides. Clomazone as selective bud evil before herbicides, but through the roots and buds absorption, with transpiration up transmission to different parts of plants, the sensitive plant chlorophyll synthetic biology inhibition, although can sprout unearthed, but without pigment, bleaching and death in the short term. Clomazone control broadleaf weeds and gramineous weeds. Clomazone is easy to drift and volatilization of herbicides, every year because of the evil of clomazone shift that is near crops such as wheat, sensitive by events such as vegetables phytotoxicity creditors. The research clomazone drift physiological and yield of wheat, clear clomazone drift the extent of the damage on wheat, by antidote to repair clomazone drift on changes in key indicators of the wheat in nitrate reductase activity and ferric ion reductase activity to clear clomazone injury drift on mechanisms of the effects of wheat. This paper studies the clomazone drift on chlorophyll content、plant height nitrate reductase activity、nitrate-nitrogen content and ferric ion reductase activity of physiological indicators in wheat, after wheat by clomazone drift injury, by spraying antidote achiecing wheat injury recovery. The results as bellow:1.28days after the drift of the clomazone, distance of12m at the point of the sprayed wheat visual injury recovery,21days after the drift of the clomazone, from the spraying point26m at the plant height have been restored.2. After clomazone drift, the chlorophyll content of wheat significantly reduced.28days after the drift of the clomazone, distance of26m at the point of the spraying of wheat chlorophyll content returned to normal.3.7days after the drift of the clomazone, nitrate reductase activity of wheat was significantly increased, where0m、2m and4m of wheat nitrate reductase activity, compared with the control of nitrate reductase activity increased by156.56%、124.19%and120.94%. Drift distance of26m at the nitrate reductase activity with the control was no significant difference at21days. Drift clomazone distance0m to2m and4m at the wheat nitrate reductase activity compared with the control, respectively, an increase of43.40%、32.63%and36.99%at28days.4.7days after the drift of the clomazone, from the spraying point0m、2m、4m、8m、12m and16m at the rate of inhibition of the nitrate-nitrogen content of55.75%、49.67%、42.20%、32.16%、34.29%and25.05%, since then, the inhibition rate gradually reduced.14days after the drift of the clomazone, spraying at a distance of26m at the point of the wheat leaf nitrate-nitrogen content1.023μg/g, compared with the control was no significant difference.5. After clomazone drift, wheat root ferric ion reductase activity neither significantly affected.6. After clomazone drift, distance from the spraying point0m～16m at the cause of wheat significantly cut, from the spraying point26m at the wheat production was no significant difference with the control.7.Spraying antidote to wheat chlorophyll contents plant height and yield has a recovery effect after spraying clomazone.7days after the application of the antidote, wheat visual injury, plant height and chlorophyll content in clomazone drift distance of6m at the recovery to normal state; Wheat production in the10m department of the distance clomazone spraying point compared with the control was no significant difference.