Articles

Spraying with YARICA

Wheat plants were treated with both YARICA (sprayed once) and ammonium nitrate applied either one or two times. The first fertilizing with ammonium nitrate of winter wheat (Vekha variety) was carried out at the beginning of tillering; the second fertilizing was done in the middle of tillering. The plants were sprayed with YARICA (3.3% working solution, dosage 10 l/h) at the end of tillering. This led to the increase in yields by 2.6 kg/ha (6.5%). In the other test the wheat plants were sprayed with 6.6 % YARICA working solution (dosage 20 l/ha), which led to the increase in wheat yield by 3.8 kg/ha (9.4%). The best yield indicators were obtained when the wheat plants were treated with ammonium nitrate (double spraying) 1.5 q/ha + 2.0 q/ha and YARICA 20 l/ha; the increase was 44% (17.7 q/ha) compared to the control yield.

The protein content in wheat grains in the control plants was 10.9 %; the gluten content in control plants was 16.5%. The grain weight per ear averaged around 1.12 g. The bunker yield amounted to 46.8%. In the test, the wheat plants were sprayed with YARICA (20 l/ha) and treated with ammonium nitrate (double spraying – 1.5 + 2.0 l/ha). The protein content of the plants then increased by 12.3%. The gluten content increased to 20.3%. The grain weight per ear was 1.32-1.41. The bunker yield amounted to 63-66 centners/ha.

The analysis of the data indicates a positive effect of YARICA on the tillering and total biomass of winter wheat plants against the background of early spring fertilization with ammonium nitrate. Regardless of the background of nitrogen fertilizer application, the treatment of winter wheat plants with YARICA contributed to an increase in the structural parameters of grains – the weight of 1000 grains, the weight of grain from 1 ear and its grain content, which in turn affected total crop yields.

The maximum increase in wheat yields was reported in cases when YARICA (20 l/ha at)  was applied at the end of winter wheat tillering together with ammonium nitrate applied (a) twice – at the beginning (1.5 q/ha) and at the middle (2.0 q/ha) of tillering and (b) once –  at the beginning (2.0 q/ha) of tillering. The yield increase amounted to 17.7 centner/ha (44%) in (a) and 17.0 centner/ha (42.3%) in (b). The use of YARICA (dosage 10 l/ha) against the background of ammonium nitrate also contributed to the increase in wheat yield by 15.2 kg/ha (37.8 %).