Abstract:
An experiment was
conducted at Field Laboratory of the
Department of Crop Botany, Bangladesh
Agricultural University, Mymensingh, to
find out the effect of dhaincha incorporation
on subsequent rice crop yield and postharvest
soil nutrient status. The experiment
was laid out in a randomized complete
block design having three replications. Nine
dhaincha accessions were used as
experimental materials along with a control
(without dhaincha plant). Seeds of dhaincha
accessions were sown in experimental plot
@ 60 kg ha-1. Sixty days old dhaincha
plants were mixed up with soil. Soil samples
were collected twice, before sowing of
dhaincha seeds and after rice crop harvest.
Forty five days old healthy rice seedlings
were transplanted in the well prepared
dhaincha incorporated plots at the spacing
of 15 cm x 25 cm (plant-plant x row-row).
The pH and nutrient status were improved
in dhaincha incorporated soil over the
control. The highest grain yield (5.81 t ha-1)
was obtained from dhaincha Acc. 33
incorporated plot followed by Acc. 25
(5.73 t ha-1) and the lowest in control (4.35 t
ha-1). Due to the incorporation of dhaincha
biomass in soil, the rice grain yield
increased 7.82% to 33.56% over the control.
Among the dhaincha accessions, number 33
showed the best performance in terms of
influencing grain yield. A precise
conclusion to be built up through collection
of large number of germplasms from
Bangladesh is needed.
