The effect of various kinds of nitrogen fertilizers on the yield, nutritive value and mineral composition of cock's foot (Dactylis glomerata) herbage
1997
Tuma, J. (Vysoka Skola Pedagogicka, Hradec Kralove (Czech Republic). Pedagogicka Fakulta)
In three-year trial with cock's foot in pure culture the effect of various kinds of N fertilizers was studied in four-cut use as affected the mineral composition of herbage. The trial consisted of four treatments with uniform fertilization with Ca, Mg and P. The treatment I used ammonium nitrate with limestone (LAV), treatment II contained calcium nitrate (LV), treatment III - urea (MO) and treatment IV - DAM 390. In all treatments a uniform dose of 50 kg N.ha-1 (i.e. 200 kg N.ha-1 annually) was applied to each cut. In LAV fertilized treatment the highest average dry matter yield of herbage was recorded (by 9 % on average). In LV fertilized treatment significantly lower nitrate content was recorded (by 80 % on average), crude protein and nitrogen-energy quotient. P and K content was dependent on amount of rainfall, Ca and Mg content in herbage was in positive correlation with average temperature.
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