EFFECT OF POTASSIUM ON GROUNDNUT (Arachis hypogaea L. ) UNDER SALT STRESS CONDITIONS
Loading...
Files
Date
2005-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
JAU,JUNAGADH
Abstract
Pot and field trails were conducted during kharif 2002-03 with
a view to study the effect of K on groimdnut under salt stress
conditions. Galvanized pot of 30 x 60 x 75 cm3 filled with 40 kg
normal soil in two different set, foior salinity levels (EC 2, 4, 8, and
12 dS m-i)i.e. Si, 82, S3 85 S4, respectively, were developed by using
salt mixture of NaCl and Na2S04 in ratio of 4 : 1, where as four
sodicity levels (ESP, 10, 20, 40 and 60) i.e. Ei, E2, E3 85 E4,
respectively, were developed by using sodium bicarbonate. Three
levels of K (25, 50 and 100 kg K2O ha"i) along with control were
applied in both salinity and sodicity levels. For the field experiments,
saline and sodic soils were selected with EC (1:2:5) 4.70 and ESP
21.56, respectively, with six treatments using three treatments of K
i^e. K 25, 50 and 100 kg K,0 ha k one treatment of K and Zn i.e 1 no
kgKtOha-l + 10 kgZnS04ha-l and one treatment of FYM alone @lo
t ha-1 along with control.
In pot experiments the yield of pod and haulm of groundnut
significantly decreased at S4 levels to the tune of 167.24 and 233.74
per cent, respectively. Application of K (100 kg K2O ha-i) significantly
increased it to the tune of 34.20 and 32.44 per cent, respectively
The content and uptake of K, Ca and Mg at 30, 60 and 90 DAS
decreased and content and uptake of Na by groundnut pod and
haulm increased significantly at S4 level. Application of 100 kg K2O
ha-i significantly increased the content and uptake of K, Ca and Mg
and decreased the content and uptake of Na. The Na/K ratio at 30,
60 and 90 DAS significantly increased with 84 levels and
significantly decreased with application of 100 kg K2O ha-i
Interaction effect of K and salinity levels were also found significant
in case of yield, content and uptake of K, Ca, Mg and Na at 30, 60
and 90 DAS by haulm and pod and Na/K ratio at 30, 60 and 90
DAS.
The pod and haulm yields decreased significantly with sodicity
levels E4. The decrease in pod and haulm yields were upto 406.32
and 275.42 per cent, respectively, at sodicity level E4. Application of
100 kg K2O ha-i significantly increased the pod and haulm yields to
the tune of 50,56 and 44^05 pe^r tpsppctively,
The content and uptake of K, Ca and Mg at 30, 60 and 90 DAS
by groundnut pod and haulm decreased and content and uptake of
Na increased with sodicity level E4. The Na/K ratio at 30, 60 and 90
DAS also increased significantly with sodicity level E4. Application of
K @100 kg K2O ha-i significantly increased the content and uptake of
K, Ca and Mg at 30, 60 and 90 DAS by groundnut pod and haulm
and decreased content and uptake of Na and Na/k ratio at 30, 60
and 90 DAS. Interaction effect of K and sodicity levels was also
found significant in case of yield, content and uptake of K, Ca, Mg
and Na at 30, 60 and 90 DAS by groundnut pod and haulm and
Na/K ratio at 30, 60 and 90 DAS.
In field trails pod and haulm yields increased to the tune of
19.78 and 8.16 in saline as well as 28.14 and 16.37 per cent in
sodic soil condition, respectively, due to application of 100 kg K2O
ha h Number of mature and immature pods per plants and dry
mature yields at 30, 60 and 90 DAS significantly increased with
treatment T5 (NP +100 kg K2O ha-i + 10 kg Zn ha-i) in saline and
sodic soil condition. The content and uptake of N, P, K, Ca and Mg
at 30, 60, 90 and at harvest significantly increased with application
of 100 kg K2O ha-i + 10 kg Zn ha-i in saline and sodic soils.
Available K significantly increased with treatment T5 in sline
soil whereas, available N, P and K significantly increased with
treatment T5 in sodic soil.
Description
Keywords
AGRICULTURAL CHEMISTRY AND SOIL SCIENCE