Bioresources in the intensification of agriculture in Siberia | Биоресурсы в интенсификации земледелия в Сибири
2010
Sorokin, I.B., Siberia Research and Development Inst. of Agriculture and Peat, Tomsk (Russian Federation)
In 2007-2009 the efficiency of a systematic application of straw was studied in the Tomsk Region (the Sub-Taiga Zone of the Western Siberia). Test versions for gray forest soil included control, N 45 kg/ha, straw (5 000 kg/ha) + N45, straw (5 000 kg/ha). Organic matter intake and mineralization of it was studied at a 5-field grain and fallow rotation with applying of annual and perennial green manure. In 1998 peat had been applied for reclamation; a dose-effect of peat was studied till 2007. The experiment included control, peat 200 000 kg/ha, peat 400 000, N60P60K60 kg/ha (background), background + peat 200 000, background + peat 400 000 kg/ha. Straw application increased a grain yield by about 10%. An yield gain was the highest (23.8%) when straw was embed in conjunction with mineral nitrogen. Organic matter deficit in soil amounted to 59 000 kg/ha of an equivalent organic fertilizer for a rotation without the use of organic fertilizers. Annual straw application decreased the deficit till 17 000 kg/ha. A complex application of straw and green manure allowed to reach a positive balance of organic matter (5-14 000 kg/ha per year). Application of peat reclamation doses increased the humus content in 1.4-1.6 times (for 19 years), at that time crop yields increased by 20-25% and it did by 56-70% at a mineral fertilizer background
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