METHOD FOR CULTIVATION OF RED CLOVER IN CLEARLY DEFINED CONTINENTAL CLIMATE Russian patent published in 2005 - IPC

FIELD: growing of high-protein crops, in particular, red clover under clearly defined continental or similar conditions or in arid climatic zones.

SUBSTANCE: method involves sowing red clover (trifolium pratense L.) and cover crop at optimal time in spring; after harvesting of preceding crop, providing stubble breaking to 0.06-0.08 m depth and ameliorating mellowing to 0.6-0.8 m depth; applying phosphorous-potash fertilizer to provide for 3-4 year life of plants; plowing soil while turning layers by means of bottom-moldboard plows to 0.25-0.27 m depth while fully embedding stubble remains; after deep ameliorating tillage combined with turning of root layer, providing irrigation at the end of September - beginning of October at irrigation rate of 700-900 m³/hectare for keeping pre-irrigation soil moisture threshold; closing moisture feeding in early spring by means of heavy harrows in two tracks transverse to center ridges during moldboard plowing and simultaneously leveling field relief; providing cultivation to 0.05-0.08 m depth for killing cold-resistant weeds by means of A-hoes; providing presowing and postsowing compaction for increasing soil density in seeding layer at 0-10 cm depth; performing interlace sowing in early spring (0.30 m) of cover crop (oats, less commonly barley) at seeding rate of (3.0-3.5)·10⁶ pieces of seeds per 1 hectare (continuous sowing at seeding rate of (8.5-9.5)·10⁶ pieces per hectare to 0.03-0.04 m depth on light soil and 0.02-0.03 m depth on heavy soil for producing of 450-500 plants per 1 m² at full germination phase, 250-300 plants at spring growing phase of second year of life, 200-220 plants per 1 m² at spring growing phase of third year of life; providing mineral feeding by applying rated norms of phosphorous-potash fertilizer for stock plowing for three years of utilization of herbage, and applying differentiated doses of nitrous fertilizer for further mowing. Application of up to 100 kg/hectare of nitrogen during growing period at maximal dose of 35 kg/hectare for first mowing provides yield of up to 60 t/hectare of green mass, and application of 130 kg of nitrogen per hectare during growing period at maximal dose of 45 kg/hectare for first mowing provides yield of up to 80 t/hectare of green mass. Yield of 40 t/hectare of green mass is provided at irrigation norm of 850 m³/hectare with minimal period between irrigation procedures of 14-16 days, with total irrigation norm making 3,200-3,400 m³/hectare. Clover is mown at flowering phase. Time between green mass harvesting and irrigation procedures is reduced to 1-3 days. Last mowing procedure is performed 25-30 days before air temperature reaches 0⁰C.

EFFECT: improved quality of feed and predetermined productivity.

12 cl, 2 dwg