The effect of the intensity of nitrogen fertilization and several ecological factors on the chemical composition of grass crops
Vedecke Prace Vyskumneho Ustavu Luk a Pasienkov v Banskej Bystrici 10: 11-22
Crops were tested at 4 localities at altitudes of 600 and 800 m and with northern and southern exposures. All 4 were given a P/K ratio of 32/100 in 1 kg of pure nutrient and 3 also received, in addition, 30, 60 and 120 units of N. The P and K were applied once at the beginning of vegetation while N was applied 4 times, once in the spring and after each mowing. Fertilization caused an increase in N content of 9.93-17.27% at 600 m and 14.87-19.43% at 800 m. P content was not affected at 600 m but was increased at 800 m. Southern exposure had the more pronounced and favorable effect. K content increased by 2.90% at 600 m and by 2.32% at 800 m. N fertilization had a slightly negative effect on Ca content which was most pronounced at 600 m with a northern exposure.