Joint International Conference on Long-term Experiments ...

Table 2: Mean temperature at Nyíregyháza (°C)
Year 2001 2002 2003 2004 2005 2006
January -1,3 -2,8 -3,0 -0,9 -4,5
February 4,0 -5,3 0,1 -3,3 -1,9
March 7,0 3,3 5,7 2,9 3,2
April 11,2 10,3 11,6 11,3 12,0
May 20,4 19,4 14,6 16,1 15,6
June 20,1 21,1 18,9 18,6 19,3
July 23,1 21,8 21,0 21,2 22,5
August 20,6 22,4 20,3 19,8 19,4
September 14,0 14,8 15,0 15,0 16,2 16,9
October 12,4 9,1 7,9 11,2 10,2 11,1
November 1,9 5,9 6,1 4,8 2,7 5,9
December -5,2 -2,4 -0,3 0,8 0,0 2,5
Mean (°C) 11,1 9,9 10,1 9,6 10,2
Rye yield data taken in the selected crop rotation regimes are presented in Figure 1.
Crop rotation regime with no nutrient supply:
The lowest rye yield was obtained in 2002 and 2006 (1.26 t/ha and 1.27 t/ha
respectively), years with an average amount of rainfall. Higher yield was obtained in
2003, a drier year (1.56 t/ha) and in 2005, a year with an average amount of rainfall
(1.73 t/ha). The highest yield was obtained in 2004, a year with high amount of rainfall
(2.03 t/ha).
Crop rotation regime with straw manure treatment:
Also in this regime, the lowest yield was obtained in 2002 (1.74 t/ha) and in 2006 (1.74
t/ha), followed by the years 2003 (2.56 t/ha) 2005 (2.68 t/ha). The highest yield was
obtained again in 2004 (2.87 t/ha).
Crop rotation regime with farmyard manure:
The lowest rye yield was obtained in 2002 (1.93 t/ha), followed by the year 2003 (2.52
t/ha). Close to each other were 2005 and 2006 with yields of 3.13 and 3.02 t/ha,
respectively. The highest yield was obtained in 2004, with a value of 3.82 t/ha, which is
1.9 t/ha more than that obtained in 2002.
Crop rotation regime with lupin green manure as second crop ploughed under in
autumn:
The lowest yield was obtained again in 2002 (1.44 t/ha), followed by 2006 (1.96 t/ha),
2003 (2.26 t/ha) and 2005 (2.60 t/ha) similarly to regimes with no nutrient supply and
with straw manure. The highest yield was obtained in 2004 (3.93 t/ha). Also in this
regime, there was a substantial difference between the lowest and the highest yield
obtained. The yield difference between 2004 and 2004 was greater than 100 %.
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