Agriculture Reference
In-Depth Information
TABLE 3.9
Nitrogen Uptake in the Shoot or Straw and Grain of Dry Bean Genotypes
Genotype
N Uptake in Shoot (mg Pot
−
1
)
N Uptake in Grain (mg Pot
−
1
)
Pérola
292.8a
838.3a
BRS Valente
242.4ab
267.0c
CNFM 6911
181.1ab
727.6ab
CNFR 7552
202.3ab
405.8bc
BRS Radiante
296.6a
581.9ab
Jalo Precoce
224.1ab
608.1ab
Diamante Negro
237.8ab
610.5ab
CNFP 7624
191.0ab
564.4ab
CNFR 7847
124.5b
712.5ab
CNFR 7866
271.0ab
648.9ab
CNFR 7865
263.5ab
723.0ab
CNFM 7875
138.0ab
615.3ab
CNFM 7886
193.4ab
594.9ab
CNFC 7813
136.5ab
616.6ab
CNFC 7827
127.9b
660.8ab
CNFC 7806
157.9ab
569.0ab
CNFP 7677
138.2ab
711.0ab
121.5b
634.6ab
CNFP′7775
CNFP 7777
195.5ab
759.8a
CNFP 7792
170.2ab
410.4bc
Average
195.3
613.0
F-test
N rate (N)
**
**
Genotype (G)
*
*
NS
NS
N × G
Source:
From Fageria, N. K., L. C. Melo, and J. P. Oliveira. 2013a.
J. Plant Nutr
. 36:2179-2190. With permission.
Note:
Values are across two N rates. N rates were 0 and 400 mg kg
−1
.
*,**, NS: Significant at the 5% and 1% probability levels and nonsignificant, respectively. Within the same column, means
followed by the same letter do not differ significantly at the 5% probability level by Tukey's test.
The author studied nutrient uptake, including N in the straw and grain of soybean, under differ-
ent lime rates. Liming in the shoot of soybean significantly influenced the uptake of P, K, Ca, and
Mg (Table 3.10). Similarly, in grains, lime had a significant influence on the uptake of N, P, K, and
Mg. In shoots, the uptake of N at 6 Mg lime ha
−1
(rate of maximum economic yield) was 9% higher,
the uptake of P was 14% higher, the uptake of K was 24% higher, the uptake of Ca was 63% higher,
and the uptake of Mg was 27% higher compared to the control treatment. Similarly, in grains, there
was a 55% increase in the uptake of N, a 56% increase in the uptake of P, a 57% increase in the
uptake of K, a 61% increase in the uptake of Ca, and a 62% increase in the uptake of Mg at 6 Mg ha
−1
lime rate compared to the control treatment. The relationship between lime rate and nutrient uptake
was determined in shoots and grains (Table 3.11). There was a significant and quadratic increase in
the uptake of all the macronutrients in shoots and grains, except N uptake in the shoot. The increase
in the uptake of these macronutrients with increasing lime rate was associated with the increase in
shoot dry matter and grain yield by liming.
The accumulation of macronutrients in the soybean plant (shoot and grain) was in the order
of N > K > Ca > Mg > P. Fageria (2001b) reported a similar accumulation pattern in soybean
plant grown on Brazilian Oxisol. Overall, macronutrient use efficiency (kg grain/kg nutrient
