EFFECT OF MULCHES ON THE YIELD OF SUNFLOWER IN COASTAL SALINE AREAS OF BANGLADESH

B.  Hossain; N. M  Jahangir; M.  Ahsan

doi:10.53808/KUS.2002.4.1.0203-L

Authors

B. Hossain Soil Science Discipline, Khulna University, Khulna 9208, Bangladesh
N. M Jahangir Salinity Management and Research Centre. Soil Resource Development Institute, Khulna.
M. Ahsan Salinity Management and Research Centre. Soil Resource Development Institute, Khulna.

DOI:

https://doi.org/10.53808/KUS.2002.4.1.0203-L

Keywords:

Sunflower; yield; mulches; soil moisture; soil salinity; coastal area.

Abstract

A field experiment was carried out on slightly saline medium high land nearly level Bajoa soil series developed on Ganges tidal flood plain. Four different types of mulches viz. water hyacinth, rice straw, rice husk and polythene sheet were used in this experiment. Sunflower (Helianthus annus L.) variety "Kironi" was taken as an index crop and was cultivated during January-April, 2001. Rice straw and rice husk as mulch responded better production to sunflower and the yield was 2.03 and 2.02 t/ha. Whereas, the yield ( 1.77 t/h) was found in case of water hyacinth as mulch. Rice straw and rice husk preserved 29.2-44.4% moisture and decreased 39.6-42.3% soil salinity than that of fallow lands. By using different types of mulches, it was found that sunflower yield increased 6.9-14.5% than that of
without mulch and the trend were rice straw> rice husk> fallow> polythene sheet> water hyacinth. Although polythene sheet preserves maximum soil moisture and possess minimum soil salinity but yield were even less than fallow lands. It happened, may be, due to increase in soil temperature and aeration problems of soil microbes. With the consideration of both soil moisture and soil salinity, better growth and yield of sunflower was performed using rice straw and rice husk as mulches.

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