New promising annual crops for green mass in the Far North

Relevance and methods. The article presents the results of studies conducted at the Yakutsk Research Institute of Agriculture. Scientific research on the study of promising new forage crops was carried out on site 30 "A" (on the basis of the forage production laboratory of the YANIISKh) on the second floodplain terrace of the river. Lena in 2016–2018. The effect of three sowing dates on the yield of promising annual fodder crops is studied. Results. The results of studies on the growth, development, productivity, nutritional value of promising annual crops are presented. Productivity in three sowing periods during the harvesting period of sunflower reached feed units 1.2– 2.7 t/ha, crude protein — 2.5–5.1 t/ha, corn — feed units 0.7–2.2 t/ha, crude protein — 2.8–6.9 t /ha, oilseed radish feed units 1.1–1.3 t/ha, crude protein 3.3–5.0 t/ha. The optimal sowing and harvesting dates of promising annual fodder crops for the production of high-quality succulent and voluminous feeds are established — 1 term (sowing — I decade of June, harvesting — II decade of August); 2 term (sowing — the 2nd decade of June, harvesting — the 3rd decade of August) in the phase of mass flowering and discarding panicles of the tested feed crops.