XXII Annual Scientific Meeting, Tucuman Biology Society ...

208 ABSTRACTS
169.
CONTENT OF N-P-K IN DIFFERENT COMPONENTS
MORFOLOGICS FROM STRAWBERRY PLANTS cv. SELVA
IN CULTURE OF 1 st AND 2 nd YEAR IN TAFÍ DEL VALLE,
TUCUMÁN, ARGENTINA
Brandán de Antoni E, Nader C, Fernández R, Antoni H, Hernández
C, Villagra E, Jaldo H.
Fac. de Agron. y Zoot. UNT. Av. Roca 1900. (4000) Tucumán, Argentina.
E-mail: ezbrantoni47@yahoo.com.ar
The objective of the work was to determine the content of NPK in
plants of strawberry, cv. Selva of 1 st and 2 nd year cultivated in 2003/
04, in Tafí del Valle at 2000 m.o.s.l. Fertilization was: 50, 20, 100
UF of NPK, in culture of 1 st year and 110, 45 and 220 of UFN-P-K
in the 2 nd year. It was determined the content of NPK % in fruits,
leaves and petioles in plants of 1 st and 2 nd year in March of 2005.
ANVA and Test of Tukey in plant and correlation of Pearson of
NPK % in fruit took place. Significant differences in 2 nd year with
respect to 1º year of N in fruit of 1,4 and 1.2; leaves of 2,4 and 2.3;
and petioles of 0,9 and 0.7; P in: petioles of 0,19 and 0.18; K in:
petioles of 2,8 and 2,3, respectively, and significant differences in
culture of 1 st year with respect to 2 nd year of P in: fruit of 0,2489
and 0.24; K in: fruit 2,1 and 1,7 and leaves of 1,9 and 1,7, respectively,
were founded; and negative correlation in fruit between P
and N (-0.5736), K and N (-0,8277); and positive correlation between
K and P (0.4976) were founded. Its results suggest it is necessary
to adjust the fertilizers according the smaller fruits demand
of P and K% in the 1 st year.
170.
EVALUATION OF YIELDS AND ABSORPTION OF N-P-K
IN TUBER (Solanum tuberosum L. Spunta) SEED IN TAFÍ DEL
VALLE, TUCUMÁN, ARGENTINA
Brandán de Antoni E, Villagra E, Hernández C, Fernández R, Torres
C, Antoni HJ, Carrasco MP.
Fac. de Agron. y Zoot. UNT. Av. Roca 1900. (4000) Tucumán, Argentina.
E-mail: evillagra@faz.unt.edu.ar
The object of the trial was to evaluate yields and absorption of
NPK by seed potato, cv. Spunta, in Tafí del Valle, in 2004/05. The
experimental design was Blocks at random with 6 treatments:
T1.Control. T2. 100 Units of fertilization of N/ha. T3.100 UFN+90
UFP/ha. T4.100 UFN+150 UFK/ha. T5.100 UFN+90 UFP/ha+150
UFK/ha. T6. 130 UFN+160 UFP/ha, and 5 repetitions. The ANVA
and LSD in tuber yield, Test of Tukey in NPK in tubers and correlation
between production of seed potato and NPK in tubers were
realized. Differences in yield of tuber were detected between
T6(22,140) and T5(20,164) with respect to T1(12,404) kg/plot.
Significant differences in content of N were detected between:
T6(1,6), T3(1,4), T2(1,4) and T4(1,4) with T5(1.3) and T1(1.1);
between T2(1,4), T5(1,3) and T5(1,3) with T1(1,1); in content of P
between T2 (0,26), T3 (0,26), T5 (0,26) T6 (0,26) and T1 (0,24)
with T1 (0.23). There were no differences in K in tubers. Positive
correlation between yields with N (0.3233) and P (0.1338) and low
correlation of K (0.0648) in tubers were found. Its results suggest
it is necessary to realize adjustment fertilizer according the absorption
and accumulation of NPK by the tubers seed.
BIOCELL 30(1), 2006
171.
RELATIONSHIP BETWEEN LOW TEMPERATURES AND
TISSUE DAMAGE IN LEMON (Citrus limon L.)
Amado ME, Rodríguez Rey JA, Flores Álzaga LD, Pardo PA,
Martínez ER, Díaz JV, Delgado N, Orell EE.
Fac. Agr. y Zoot. UNT. Tucumán. E-mail: meamado@faz.unt.edu.ar
Lemon has become very important crop in Tucumán in the last
years. This province presents big thermic variations with frequent
Autumn-Winter frosts. At -2°C flowers, at -3°C leaves and -9°C
woody tissues are damaged. Damage is related with the duration of
low temperatures. The objective of this study was to evaluate tissue
damage caused by low temperatures in different top sectors of
lemon plants. It was worked in El Manantial with Eureka variety
top and Citrange Troyer rootstock trees. The low temperature incidence
on North and South top sectors was evaluated. The mean
minimum registered was 3°C. The cellular flux conductivity of leave
tissue was determined as Dexter (1932) modified by Amado and
R. Rey (1984). In each sampling date, 10 samples were incubated
at 25°C, 15 hs. (control) and 10 treated at -10°C, 2 hs., then incubated
the same as control. Tissue damage index (T.I.I., Singh and
Kanwar, 1978) was calculated: T.I.I=Control Conductivity (25°C)/
Treatment Conductivity (-10°C). Conductivity determination of the
cellular flux of congealed and uncongealed cells permits to evaluate
the low temperatures damage to the membrane system functioning.
Results show greater tissue damage at leave level at top
South sector than at the North one owing to the cold front advance
from that orientation.
172.
EFFECT OF THE THERMIC FACTOR IN THE REPRODUC-
TIVE DEVELOPMENT OF PEPPER CROP
Amado ME, Budeguer RF, Flores Álzaga LD, Pardo PA, Martínez
ER, Alderete G.
Fac. Agr. y Zoot. UNT. Tucumán. E-mail: meamado@faz.unt.edu.ar
The pepper production in greenhouse constitutes an important activity
for Tucumán province (Argentina). Pepper is a species with
high sensibility to low temperatures, manifesting a growth detention
at 10°C and minor flower coagulation at 18°C. The objective
of this study was to evaluate the development of the pepper crop in
a determined thermic cycle for the 2005 year employing the minimum
temperatures occurred in the greenhouse. It was worked from
last May to middle September in the Centro de Experimentación
Adaptativa Lules (CEAL) dependent of the Instituto Nacional de
Tecnología Agropecuaria (INTA) located at San Isidro de Lules
(Tucumán province). It was used the Margarita hybrid. The implantation
was made to a distance of 40 cm between plants and 120
cm between lines. Evaluations were made from May 31 st to September
19 th consisting on the extraction of three entire plants. Fresh
weight, dry weight and number of flowers per plant were determined
according to the methodology of evaluation and analysis of
the growth. Results show a decreasing of the number and dry weight
of flowers in an 80% when minimum greenhouse temperature decreased
from 10°C to 3°C which indicates minor flower coagulated
and low yield of the pepper crop at cooling temperatures.