The Productive Longevity Of Perennial Grasses Swards Depending On The Npk Fertilizer Rates

P. Berzins, S. Rancane, A. Svarta


The longevity and producing capacity of perennial grasses swards was studied on mineral soils at the LUA Research Institute of Agriculture in long-term experiment during 1974-2010. There were applied lime and mineral fertilizers with different NPK doses (0-400 kg ha-1) protractedly many years. In such way there formed soils with various content of P, K, organic matter content and pHKCl level as well. Research results showed that liming of soils and using of mineral fertilizer changed not only productivity of grass mixtures but also botanical composition. Mineral fertilizer N200P100K300 provided the highest yield of dry matter – 7.32 - 12.0 t ha-1 and optimal botanical composition of a sward during many years. On unlimed soils (pHKCL less then 4.0 in 1997) dry matter yields of grass sward was substantially lower and there was observed disappearance of seeded valuable grasses out of the sward and increase of herbs and non-seeded grasses –Festuca rubra L., Agrostis tenuis Sibth., Taraxacum officinale Wigg. and others. Liming of soils increased dry matter yield in treatments with high doses of N (300-400) fertilizer.


botanical composition; dry matter; fertilizer; liming; perennial grasses; swards

Full Text:



Jansone, B., Rancane, S., Berzins, P., Stesele, V., Jansons, A. Evaluation of perennial grass mixtures of differnt species and varieties in the central part of Latvia introduced from other European countries. Agronomy Research, Vol.8, Special Issue 3, 2010, p. 563-572.

Gutmane, I., Adamovics, A. Productivity aspects of Festulolium and Lolium x boucheanum cultivars. Grassland Science in Europe, Vol. 11, 2006. Proceedings of the 21st General Meeting of the EGF: Sustainable Grassland Productivity. Badajoz, Spain, p. 155-157.

Puke, A. Determination of optimal rates of NPK-fertilizer use in many-harvested perennial grass sward. Increased productivity and sustainable use of grasslands and pastures. Riga, Zinatne, 1986, p. 105- 120 (in Russian).

Antonijs, A., Berzins, P. What determines the longevity of perennial grasses. Latvian farmer, No. 6, 1998, p. 14 (in Latvian).

Antonijs, A., Rumpans, J., Berzins, P. Fertilizer effects on pasture and meadow grasses longevity and productivity. Yield, No.2, 1998, p.5-7 (in Latvian).

Berzins, P., Antonijs, A., Rumpans, J. Fertilizer efficiency in the swards of perennial grasses. Agronomy research, No.1, 1999, p.24-29 (in Latvian).

Antonijs, A., Adamovics, A., Berzins, P., Rumpans, J. The promotion of productive longevity and quality improvement of perennial grasses swards. The results of long-term field experiments in Baltic states. Proceedings of the International Conference, Jelgava, Latvia, November 22-23, 2000, p.5-10 (in Russian).

Antonijs, A., Berzins, P. Phosphorus and potassium balance at the sward of perennial grasses. Agronomy research, No.3, 2001, p.176-179 (in Latvian).

Antonijs, A., Rumpans, J. The productivity and botanical composition of perennial grasses swards. Agronomy research, No.4, 2002, p.151-155 (in Latvian).

Daugeliene, N. Effect of liming and fertilization on the productivity of a long-term pasture. Grassland Science in Europe, Vol. 11, 2006. Proceedings of the 21st General Meeting of the EGF: Sustainable Grassland Productivity. Badajoz, Spain, p. 122-124.



  • There are currently no refbacks.

SCImago Journal & Country Rank