My question rises from my own experience. When I sing multiple low notes (G2,A2,B2,C3), I can't hold the notes as long as when I sing middle notes (G3,A3,B3). So is it because of a technical error or naturally body requires more breath for singing low notes?
Not being able to hold certain notes as well as others could have to do with a number of things.
1) Range - it is very possible your range is higher than these notes you mentioned. I would recommend having a vocal coach determine your range for you. Sometimes after years of singing, your range can go up or down. Sometimes you might lose the ability to sing certain notes. However, it is more likely you are singing a part too low for your vocal register.
2) Technique - knowing how to breathe from your diaphragm, where to take your breaths in the song before more challenging pitches, how to sing from your chest and not your throat, etc. All of these things can make the difference between singing with ease and struggling to maintain breath. This requires a good practice regiment and lots of hydration.
3) Endurance - professional singers and horn players have incredible endurance in pushing air with their diaphragm and chest. Good technique in combination with endurance allows for longer and more consistent performances.
Now, does singing lower notes require more breath? Horned instruments provide a great example to answer your question and tie all of this together.
A tenor saxophone has a specific range. A technically skilled, in-shape player will have no trouble hitting each note of the saxophone. However, it requires a combination of more breath while staying relaxed to push air through the horn to have it produce the lowest note. Assume the same player is equally as skilled with a baritone sax and he would require less breath to hit the lowest note the tenor sax can hit. Your vocal chords are no different.
Lower notes require more breath. To see for yourself, blow up a balloon. Pull the neck out to make that squeaking noise we all loved as children. Measure the time it takes for the air to run out with a high note, and the time it takes for a lower note. The vocal cords work on pretty much the same principle.