The origin of the grain full throttle

Grain full, its meaning is the grain of summer crops begin to be grouted full, but not yet mature, just grain full, is not yet full.About the Gregorian calendar every year on May 21st for grain buds.

In may each year between 20 to 22, depending on the sun arrived at yellow diameter 60 ° for grain buds.In grain full throttle, the our country except Tibet, qinghai, heilongjiang, inside, outside, for five days in many parts of the north of the Yangtze river will reach more than 22 ℃, the average daily temperature climate in the sense of summer begins.Ancient Chinese grain buds can be divided into three hou, "a hou sowthistle show;2 wait to repulse the grass died;Three hou to early summer.Mean grain full throttle, sowthistle has leafy;Xi Yin and some branches of soft grasses in the bright sunlight began to die;At this time of wheat began to mature.