|
|
vol. 3, nr. 1 (2004)
|
Estimation of water needs and results of irrigation of cocksfoot
|
|
|
Stanisław Dudek, Jacek Żarski, Renata Kuśmierek
|
|
| (get PDF )
|
|
|
Department of Land Reclamation and Agrometeorology, University of Technology and Agriculture, ul. Bernardyńska 6, 85-345 Bydgoszcz |
|
|
vol. 3 (2004), nr. 1,
pp. 43-48
|
|
|
abstract:
The paper was based on the results of a field experiment carried out in the years 2000-2002 on a gray brown podzolic soil in Mochełek near Bydgoszcz. Cocksfoot cv. 'Dika' was tested. Investigated factors were the following: irrigation and the three levels of fertilization: 0, 90 and 180 kg N ha-1. Water needs of grasses were estimated on the base of calculation of indicator evapotranspiration according to formulas of Bac, Grabarczyk and Penman. It was found that the water needs of cocksfoot were to low or overestimated as dependent on a formula used. Increased covering the water needs by irrigation caused small yield increases in particular cuts. The method of optimum rainfall according to Klatt was the better indicator of estimation of the water needs of plants. This method is recognized at present as inaccurate. Research indicated also the much more importance of nitrogen fertilization as the yield - creating factor in comparison to irrigation. This result can be explained by the soil conditions of the field experiment.
|
|
keywords:
cocksfoot, irrigation, fertilization, evapotranspiration, optimum rainfall
|
|
original in:
Polish
|
|
|
|
|
|
