Method for pre-thinning of undaria pinnatifida

[0012] The specific embodiment of the present invention will be described below: a kind of pre-thinning method of Undaria pinnatifida, carries out according to the following steps: before the operation of clamping seedlings of Undaria pinnatifida, get the temporary seedling seed rope, and length is more than 0.3cm to the seedling rope. Wakame seedlings are measured, and the quantity is marked as A / cm, that is, A wakame seedlings are contained on the seedling rope of every 1 cm,

[0013] Then the seedling rope is taken out from the seawater, beat on the chopping board or the side of the boat to make a part of the wakame seedlings fall off from the seedling rope, then put the seedling rope back into the seawater for rinsing, and remove the seedlings separated from the seedling rope. kind cleared from the rope,

[0014] Afterwards, the length on the seedling rope is measured again for the wakame seedlings more than 0.3cm, and this quantity is marked as B / cm, guaranteeing B:A=0.4-...

[0018] In the season of undaria seedlings, use a small boat to fish out a hanging curtain of undaria seedlings in the sea area, put them into a plastic bucket filled with sea water, and put the plastic bucket in a cool place in the cabin in advance.

[0019] Randomly select 5 seedling ropes and straighten them. The number of undaria seedlings with a unit length greater than 0.3cm in any five sections of each seedling rope is counted with the naked eye (the above-mentioned unit length is 2cm), and the counting results are 22 and 19 respectively. , 29, 31, 21. The average density of the undaria seedlings can be calculated to be 12.2 / cm.

[0020] Take the seedling curtain out of the square bucket, beat it on the front and back of the side of the boat 5 times, put it in seawater and rinse it repeatedly, and clean up the seedlings that have fallen off and are not firmly attached.

[0021] Count the number of undaria seedlings on the seedling curtain again according to the above me...