Abstract
Two field experiments with rates of boron (B) fertilization (broadcast application and incorporation in soil immediately prior to sowing of maize: 0, 2, 4, 6, 8 and 10 kg B/ha in form of borax) were conducted under different environmental conditions (locality A: Bizovac near Osijek ; locality B: Rugvica near Zagreb ; air-distance between two localities about 180 km in WE direction) for two growing seasons (1995 and 1996, respectively). In total, 160 kg N + 140 kg P2O5 + 210 kg K2O/ha were applied. Also, unfertilized plot (absence of NPK fertilization in the year of testing only) was included as a control. The maize inbred lines (mother parents of hybrids in seed-corn production: Os84-28 and Bc176070139 = Os and Bc genotype, respectively) were tested. The soils A and B were different chemical characteristics as follows (0-30 cm depth): pH in 1n KCl = 6.50 and 7.28 ; pH in H2O = 7.30 and 8.00 ; humus contents = 2.49% and 2.96% ; available phosphorus and potassium (AL-method) = 160 and 15.4 mg P2O5/100 g, 17.3 and 12.4 mg K2O/100 g, boron extracted by hot water = 1.20 ppm B for the soil A and unknown value for the soil B, respectively. Average grain yield was higher in the first year of testing (4.34 in comparison with 3.29 t/ha). Less favorable properties of the soil in comparison with the soil A could be in connection with lower maize yield ( 2.88 t/ha in comparison with 4.77 t/ha). Under identical environmental conditions, the higher yield was found in the Bc parent (4.00 t/ha in comparison with 3.61 t/ha). Fertilization with N, P and K resulted by increase grain yield for 48% in comparison with unfertilized plot (2.81 t/ha in comparison with 4.17 t/ha) . In general, by application of the higher B rates grain yields decreased in comparison with 2 kg B/ha application, especially in the first year of testing.
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Claims 5
Claim · model-written summary
Higher boron rates decreased maize grain yield compared with 2 kg B/ha, especially in the first year of testing.
- Treatment
- application of the higher B ratese4
- Outcome
- grain yieldse4
- Direction
- decreasede4
- Qualifier
- especially in the first year of testinge4
- Comparator
- 2 kg B/ha applicatione4
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of maize to boron fertilization”
e4“by application of the higher B rates grain yields decreased in comparison with 2 kg B/ha application, especially in the first year of testing”
Claim · model-written summary
N, P and K fertilization increased maize grain yield by 48% relative to unfertilized plots.
- Treatment
- Fertilization with N, P and Ke3
- Outcome
- grain yielde3
- Direction
- increasee3
- Value
- 48%e3
- Qualifier
- 2.81 t/ha in comparison with 4.17 t/hae3
- Comparator
- unfertilized plote3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of maize to boron fertilization”
e3“Fertilization with N, P and K resulted by increase grain yield for 48% in comparison with unfertilized plot (2.81 t/ha in comparison with 4.17 t/ha)”
Claim · model-written summary
The Bc parent yielded higher than the other parent under identical environmental conditions, at 4.00 t/ha.
- Material
- Bc parente2
- Outcome
- yielde2
- Direction
- highere2
- Value
- 4.00 t/hae2
- Qualifier
- in comparison with 3.61 t/hae2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of maize to boron fertilization”
e2“Under identical environmental conditions, the higher yield was found in the Bc parent (4.00 t/ha in comparison with 3.61 t/ha)”
Claim · model-written summary
Average maize grain yield was higher in the first year of testing.
- Outcome
- Average grain yielde0
- Direction
- highere0
- Value
- 4.34 in comparison with 3.29 t/hae0
- Setting
- first year of testinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of maize to boron fertilization”
e0“Average grain yield was higher in the first year of testing (4.34 in comparison with 3.29 t/ha)”
Claim · model-written summary
Less favorable soil properties may be connected with lower maize yield (2.88 t/ha) compared with soil A.
- Treatment
- Less favorable properties of the soile1
- Outcome
- maize yielde1
- Direction
- lowere1
- Value
- 2.88 t/hae1
- Qualifier
- could be in connectione1
- Comparator
- soil Ae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Response of maize to boron fertilization”
e1“Less favorable properties of the soil in comparison with the soil A could be in connection with lower maize yield ( 2.88 t/ha in comparison with 4.77 t/ha)”
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