Research for Identifying the Optimal Strategy of Weed Control and Fertilization on Wheat Crop

Wheat is considered the most important crop, with a high content in protein and carbohydrates, and by balance between them. Grains can be transported and preservation for long term without difficulty, and have a high ecological plasticity, being cultivated in areas with different climates and soils; full mechanization of cultural opportunities, the plant occupies large areas of cultivation. Weed control is the main work of the wheat crop technology. The yield losses due to weednes are from 10 to 70%. The control of weed in the wheat crop is mandatory, at this time the offer of herbicides at the market is very big and the problem for farmers is to choose the optimum strategy. For identifing the optimal strategy for control of weeds in wheat crop in 2014-2015 was performed a bifactorial trial where factor A - weed control with 8 graduations (a1 - untreated, a2 - Laren 60WG; a3 - Logran 20WG; a4 - Harmony 75DF; a5 - Lintur 70 WG; a6 - Sekator; a7 - Dicopur Top 464 SL; a8 - Rival Star 75 GD), and factor B - level of nitrogen fertilization with two graduations (b1 - unfertilized, b2 - fertilization with 150 kg of nitrogen/ha). After results analysis, it was found that the greatest degree of weed control was registered on Logran 20WG where the weednes degree was 8.1% at harvest and the yeld level was 2610 kg/ha at b1 unfertilized and 4325 kg/ha at b2- 150 N kg/ha. Applying of fertilization has as result increasing of yield with more than 1000 kg/ha.