Abstract：
:Water in rice fields of mountain valley of Ziro, Arunachal Pradesh was investigated for physico-chemical characterization during rice fish farming season (Kharif) of 2013. Water temperature, dissolved oxygen, biological oxygen demand, free carbon dioxide, nitrate-nitrogen, phosphate-phosphorus, chloride, total hardness, calcium hardness, alkalinity, pH, total dissolved solids, specific conductivity and water depth were studied. This study revealed that the physical parameters of water in rice fields like water temperature, pH, total dissolved solids, specific conductivity and water depth were 23.5-31.3 degrees C, 5.9-6.9, 250.34-370.5 mgl(-1), 437.75-660.33 μScm(-1) and 3.72-16.9 cm respectively. The chemical features like dissolved oxygen, biological oxygen demand, free CO2, nitrate-nitrogen, phosphate-phosphorus, chloride, total hardness Ca hardness, alkalinity were 2.4-12.9 mgl(-1), 1.5-11.1 mgl(-1), 9.7-23.35 mgl(-1), 1.28-3.9 mgl(-1), 0.005-0.539 mgl(-1), 16.6-46.8 mgl(-1), 13.9-34.5 mgl(-1), 9.6-13.53 mgl(-1) and 23.16-43.34 mgl(-1) respectively. On the other hand, investigation on planktonic life forms indicated the presence of 13.5x10(3)-84.9x10(3) indl(-1)" and 1.23x10(3)-4.86x10(3) indl(-1) phytoplankton and zooplankton respectively during the Kharif season. The above physiochemical parameters were found to be conducive for raising fish as companion crop of rice due to occurrence of diversified planktonic life forms in underneath water.
journal_name
J Environ Bioljournal_title
Journal of environmental biologyauthors
Saikia R,Das T,Das DNsubject
Has Abstractpub_date
2015-09-01 00:00:00pages
1153-9issue
5eissn
0254-8704issn
2394-0379journal_volume
36pub_type
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