What's happening at IRRI

Seminar: CESD

Tuesday, February 17, 2015, 01:15pm - 02:15pm


Rice-rice-rabi cropping systems for increasing the productivity of low salinity regions of the
coastal zone of Bangladesh

Jayanta Bhattacharya
PhD Research Scholar
CSISA-CPWF-IRRI-Patuakhali Science
and Technology University

Abstract: In the coastal zone of Bangladesh, farmers typically grow a single crop of rice (aman) during the rainy season using low yielding (~3 t/ha) and late maturing local varieties, sometimes followed by a low input and low yielding rabi (dry season) pulse or sesame crop (0-1 t/ha), and sometimes preceded by an early rainy season rice crop (aus) (~3 t/ha). The possibility of increasing productivity by a growing high yielding, short duration and salt tolerant aus variety followed by high yielding aman varieties, without jeopardizing yield of the aman crop, has been shown previously. The work presented in this seminar sought to build on this by evaluating the feasibility of intensifying to an aus-aman-rabi cropping system using high value rabi crops, in this case hybrid maize and hybrid sunflower. Replicated experiments were conducted for two years (2012-14) in the south central coastal zone comparing a range of cropping system options based around aus establishment date, choice of rabi crop, and mulching. The work showed that it is possible to implement highly productive aus-aman-rabi cropping systems, with total rice equivalent system yields of 13.9 to 19.3 t/ha/yr. The seminar will show the key strategies needed for achieving such large increases in system productivity.


Umali Bldg Rm A