Irrigation strategies using saline water for cotton crop
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Date
2014
Authors
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Publisher
CCSHAU
Abstract
The use of saline water for agriculture crop production is of paramount importance for the
regions where groundwater is saline, water table is rising and the availability of good quality water is
scarce. Three types of experiments i.e. micro plot study; field plot study and field column study were
conducted. The experiment in the micro plots was conducted to study the varietal different in the salt
tolerance of some of the BT cotton varieties. Field soil column experiment was conducted to calibrate
the soil parameters of the selected model. The experiment in the field plots was conducted to observe
crop yield which were used to calibrate and validate the model. Different cotton genotypes responded
differently when irrigated with saline water. Cotton genotype Krishi Dhan 9810-BG-II gave
considerably higher seed cotton yield than all the other genotyped when irrigation water salinity levels
was > 2.5 dS m-1. The simulation model SWAP was calibrated and validated satisfactorily for
predicting the effect of use of saline water for cotton crop. Model simulations showed that initial
salinity of the root zone is an important factor and increasing the depth of irrigation is more beneficial
than increasing the frequency of water application.
Description
Keywords
Irrigation strategies, Saline water, Bt cotton, Simulation SWAP model