The Chemical Control Of Turf Weed-Green Kyllinga (Kyllinga Brevifolia Rottb.) And Study On Its Influence Of Environmental Security

In this paper, we studied the pre-emergence and post-emergence control of green Kyllinga by pot and field trail. And then evaluated the enviromental impacts of turf after being treated by the chemical herbicide and it combined with Corn Gluten Meal. The main study results showed as follows:1. When the concentrations of Flazasulfuron and Oxadiazon were 0.1g/L and 0.4mg/L, the pre-emergence controlling effects of green Kyllinga were up to 94.52% and 93.15%. And also, when the concentrations of Flazasulfuron were 0.2g/L and 0.4g/L, the controlling effects of mature green Kyllinga were separately up to 82.25% and 96.77%.2. The green Kyllinga's pre-emergence controlling effect was 95.18%, when being treated by 0.01g/L Flazasulfuron + 50g/m2 Corn Gluten Meal, but the pre-emergence controlling effect was only 72.22%, when only being treated by 0.01g/L Flazasulfuron. Corn Gluten Meal could strengthen the controlling effects of green Kyllinga when combining it with Flazasulfuron after planting green Kyllinga 15 days, 30 days and 60 days. While Flazasulfuron and Corn Gluten Meal were combined in the field to control mature green Kyllinga , the controlling effect was 85.66% when applied only with 0.2g/L Flazasulfuron, though, after combined 0.2g/L Flazasulfuron with 100g/m2 Corn Gluten Meal, the controlling effect was up to 98.74%.3. The concentrations of 0.01g/L and 0.2g/L Flazasulfuron which were applied to the soil had slight effects on soil enzyme activities and soil chemical properties, which represented that Flazasulfuron was safe to soil enviroment.4. 0.01g/L Flazasulfuron + 50g/m2 Corn Gluten Meal and 0.2g/L Flazasulfuron + 100g/m2 Corn Gluten Meal both could obviously improved the viewing quality and the grass photosynthesis of the turf.5. The turf soil enzyme activities and soil chemical properties were significantly improved after being treated by 0.01g/L Flazasulfuron+50g/m2 Corn Gluten Meal and 0.2g/L Flazasulfuron + 100g/m2 Corn Gluten Meal.6. The correlations of soil enzymes, soil chemical properties, soil enzymes and soil chemical properties were significantly improved after being treated by Flazasulfuron combing with Corn Gluten Meal.