Abstract: Under different soil the treatments of moisture, the pot experiments were carried out to research the bleeding intensity of base department to the spike neck. Results indicate: the bleeding quantity of base department and the spike neck has prominent difference, but their variation tendency in different periods is about the same. Difference of them prove flow intensity of spike neck not only relate to roots vigor, may have close ties with the leaf, stem sheath and activity of capacity of reservoir. The water content of soil up to 100% is favorable to growth of rice.