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IMPACT OF PASTURE AMELIORATION ON PRODUCTIVITY AND QUALITY OF PASTURE FORAGE IN THE STEPPE ZONE OF KULUNDA

Abstract

The paper explores the impact of pasture amelioration (tillage with further disking and sowing of perennial grasses) on their productivity in the conditions of Kulunda zone. The authors investigated the impact caused by mineral and organic fertilizers on chemical concentration and productivity of natural and sown perennial grasses. Tillage was carried out in autumn of 2010 after application of semi-decomposed manure (20 t/ha). Organic fertilizers and mineral fertilizers were applied dozed as (NP)60K100. The researchers applied the manure once taking into consideration its impact during 5 years; mineral fertilizers were applied every spring with further harrowing. During 5 year experiment, application of organic fertilizers contributed to higher protein concentration in feeds and low concentration of fibre. The experiment didn’t observe the impact caused by fertilizers and soil tillage on fat concentration and free-nitrogen extracts. Therefore, application of organic fertilizers improves feed quality to some extent. The researchers observed the highest crop yield in the 1st year of experiment when amelioration (tillage with further disking and sowing of perennial grasses, nurse crops and application of organic and mineral fertilizers) was used. This is explained by high productivity of nurse crop (panic grass). Next years the crop yield of perennial grasses depended on the amount and period of precipitation. The highest crop yield was observed in 2013 when amelioration of natural density and application of organic and mineral fertilizers (2.5 t/ha of dry substance) was used and the amount of precipitation in vegetation period was the highest. The lowest crop yield was observed in 2014 - 0.9 t/ha of dry substance. But it must be considered that crop yield of ameliorated sown grasses in dry years doesn’t exceed the crop yield of natural density. On average the highest productivity was observed in the variant with amelioration of natural density (tillage with further sowing of perennial grasses) and application of organic and mineral fertilizers (1.98 t/ha of dry substance which was 1.04 t/ha of feeding units or 14.1gigajoule.

About the Authors

А. Вотяков
Новосибирский государственный аграрный университет
Russian Federation


В. Петрук
Новосибирский государственный аграрный университет
Russian Federation


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For citations:


 ,   IMPACT OF PASTURE AMELIORATION ON PRODUCTIVITY AND QUALITY OF PASTURE FORAGE IN THE STEPPE ZONE OF KULUNDA. Bulletin of NSAU (Novosibirsk State Agrarian University). 2017;(1):30-35. (In Russ.)

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ISSN 2072-6724 (Print)