Long term effect of sodic water irrigation, gypsum and FYM on soil properties and okra yield
Loading...
Date
2012
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
CCSHAU
Abstract
A field study was conducted using the experimental unit of an ongoing long term experiment
which has been in progress since 1994. The okra crop was irrigated with high RSC (11.5 me/L) sodic
water having three levels of gypsum [(G0, G1 and G2) G0 control, G1=50% neutralization of RSC,
G2=100% neutralization of RSC] as well as FYM [(F0, F1 and F2) (F0=Control, F1=10 tons/ha, F2=20
tons/ha)] in 2010-11 on a sandy loam Typic Ustochrept having 19.6 percent clay and 9.3 cmol kg-1
CEC in 0-30cm layer at the Vegetable Crops Research Farm of CCS HAU, Hisar. The days to 50%
germination and days to appearance of 1st flower in 50% plants was hastened with the increased
application of FYM and gypsum. The plant height, number of branches and number of fruits per plant
and okra yield showed a significant increase with the application of FYM @ 10 (F1) and 20 (F2) tons
ha-1 and gypsum @ 50% (G1) and 100% (G2) neutralization of RSC. The Zn, Cu, Mn, Fe and Ca+Mg
in okra plant were also significantly increased with the application of gypsum and FYM. The sodium
concentration in okra plant showed the decreasing trend with the increase in application of FYM and
gypsum. The increase in Na/K ratio of plant showed the declining trend with okra yield. The sodium
concentration decreased but Ca+Mg concentration increased significantly both with gypsum and FYM.
Adverse effect of residual alkalinity of irrigation water was quite prominent on physico-chemical and
microbiological properties of soil. Infiltration rate as well as hydraulic conductivity were significantly
increased with increase in gypsum level and decreased with increase in FYM level. But the bulk density
decreased with FYM and gypsum. The pH and ESP of soil particularly in surface layer (0-15cm) which
were very high under F0G0, lowered to normality with the use of FYM and gypsum as amendments.
However, the CaCO3 and organic carbon concentration increased significantly with increasing levels of
gypsum and FYM. The basal respiration ratio as well as microbial biomass carbon concentration
showed a significant increase with the application of FYM and gypsum. The Alkaline phosphtase and
dehydrogenease activity were also increased significantly with the increase in application of FYM and
gypsum when compared with treatments without the use of FYM and gypsum as amendments.
Description
Keywords
Developmental stages, Organic compounds, Oxygen, Livestock, Genes, Concentrates, Biological phenomena, Peptides, Amino acids, Inorganic compounds