Abstract: In Bangladesh, Amaranth Gangeticus L. is widely cultivated common vegetable plant especially in winter season. This study examined the effect of temperature on the distribution of major nutrient elements (Na, K, Ca & Mg) in the different anatomical parts (roots, stems and leaves) of this vegetable. The investigation was performed in the laboratory in batch system in different tubs at different salinity at four different temperatures which are considered from the average temperature change during summer and winter season in the three upazila named Sonagazi, Savar and Bashail in Bangladesh. The average temperature change was determined in air as well as different depth of soil in a sunny agriculture land of these three upazila. It was found that the average temperature change for sunny lands follows the trend Bashail > Savar > Sonagazi during summer season and reverse trend in winter season. A pot experiment was conducted to assess the effect of temperature on the uptake of mineral nutrients like Na+, K+, Ca2+and Mg2+ by the vegetable Amaranth Gangeticus L. At four different temperatures 8oc, 25oc, 30oc and 40oc. A salinity treatment was also applied in normal growth condition without temperature controlled. It was noted that the vegetable Amaranth Gangeticus L. Very sensitive towards salinity and temperature. At 25 oc, the minerals uptake (Na, K, Ca & Mg) by Amaranth Gangeticus are higher than the rest three applied temperatures. The highest uptake levels of Na, K, Mg and Ca were obtained in the soil of Sonagazi upazila with respective values (mg/g dry weight) 33.285, 44.936, 27.207 and 45.071 at 25 oc. The levels of all the elements were highly varied in the different anatomical parts of the selected plant. Moreover, this study also finds that the soil of Sonagazi upazila is more useful to cultivate Amaranth Gangeticus than other two upazila's soil and it follows the trend Sonagazi > Savar > Bashail.
Keywords: Temperature, Salinity, Nutrient, Vegetable, Analysis And Digestion.
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