A
seedling block moisturizing
seedling disc for a hand-operated rice transplanter comprises a
seedling disc and a
liquid storage tank arranged on the back of the seedling disc. A horizontally arranged spraying
pipe is arranged on the front side of the upper portion of the seedling disc, and the spraying
pipe extends from one side to the other side of the seedling disc, a plurality of spraying holes are formed side by side in the spraying
pipe opposite to the seedling disc along the axis of the pipe, the spraying holes are sequentially formed from one end to the other end of the spraying pipe, nozzles are arranged at the positions of the spraying holes, the middle of the spraying pipe is provided with a liquid inlet pipe, a quantification
barrel for measuring the spraying amount is arranged below the
liquid storage tank, a float valve is arranged at the position of a liquid inlet of the quantification
barrel, a water pump is arranged at the position of a liquid outlet of the quantification
barrel, the liquid inlet pipe of the spraying pipe is connected with the water pump, a control mechanism for controlling the float valve and the water pump is arranged on one side of the
liquid storage tank, and the top of the
water storage tank is provided with a starting switch of the control mechanism. The spraying pipe supplements water evenly, the water supplementing amount is calculated through the quantification barrel, an appropriate amount of
moisture is supplemented to seedling blocks, and the seedling
transplanting quality is improved while it is ensured that the seedling blocks are encased smoothly.