The roar of the plane sounded, and Qin Shiou stood on a steep coastal wall and looked back. As the sound became louder and louder, the silhouette of the aerial tractor appeared from behind the woods.

After the aircraft appeared, two agricultural aircraft appeared. Bill helped him to contact. The establishment of ocean pastures is not simpler than grassland pastures. For such a large area of ​​sea, just relying on an aircraft, it is too efficient to work. Slow.

  The planting of seaweed has officially started, but it is not seaweed that is sprayed by the plane now.

  Although every time we buy seaweed, we use ‘seed’ to measure and call it. In fact, these are not seeds in the traditional sense. Seaweed does not produce seeds. Instead, it breeds by splitting spores, and what the airplane throws is vigorous spores.

Qin Shiou has seen agricultural companies cultivate seaweed spores. They use plexiglass plates or plastic films as the spore attachment base. After the spores are collected, they are cultivated indoors by the inclined surface water method. After the embryos are cultivated, the spores are peeled off, and then they can be released into the sea. Sowing.

Because of the eagerness to see results, the seaweed seeds he bought this time were not microspores, but micro-mature bodies that were cultivated in the farm. This kind of seaweed seeds were cultivated indoors using a rope as a substrate, and the young sporophytes were cultivated. It grows to 1 to 2 cm.

  The agricultural plane flew over, Qin Shioudan firmly propped up a transparent umbrella and blocked him diagonally. A group of fishermen yelled and looked for something to block them, and when they couldn't find something, they turned their backs to the sea.

  After the plane flew to the surface of the sea, the injection port was opened, and a white curtain appeared immediately. The fluttering white powder with thick smoke was scattered down, and when it fell into the water, the sea became more turbid.

  These things are lime, so they have to avoid them.

  The first batch of seaweed to be released is macroalgae. The sporophyte of this thing is very delicate and delicious, and it is one of the favorite foods of sea urchins, starfish, and various benthic shellfish.

  There are two purposes of putting lime, one is to change the pH of the sea water, and to inhibit the activity of these organisms in the sea that will eat macroalgae; the other is to play a bactericidal effect. There is no living water in this inner bay. The seawater metabolism rate inside is too slow. The fish, shrimp and seaweed cannot be taken away after they die and rot. They accumulate in these places to feed a large number of bacteria.

  Seaweed is a little expert in sea water purification. But their sporophytes are very sensitive. Why are the conditions in this bay suitable for the growth of seaweed, but there is not much seaweed growing on the seafloor? The reason is that there are too many bacteria and many sporophytes cannot survive.

  The spores of macroalgae have strong cold resistance, so they can be placed casually in winter and spring. Now this season is most suitable for placing kelp spores. Calculated by time, their fastest growing time happens to be summer. At that time, their needs for sunlight and nutrients reached their peak, and the summer weather was just enough to meet their growth needs.

  The three planes went back and forth twice, and the lime powder they put in covered a sea area of ​​about hundreds of square kilometers. This sea area is the deepest place. Outside the continental shelf, macroalgae can grow in waters with a depth of several hundred meters.

  Lime powder is put in, and then the cultivated sporophyte is put in. Of course, this is not like spreading seeds on land, just to sprinkle these spores.

   Macroalgae are a bit like plants such as loofah and grapes to some extent. They need to cling to something to grow faster. If they are floating in the sea, after a few big waves, they might not know where they will drift...

The agricultural aircraft dropped a piece of submerged raft, which is a triangular and umbrella-shaped culture raft composed of a plastic frame and a plastic rope. There is a growing substrate for the rapid growth of macroalgal sporophytes, which can provide the initial stage for the sporophytes. The energy required for growth. It can also become an attachment to mature macroalgae.

  China uses the diving rope method. That is, the plastic rope is used as the substrate and the macroalgae larvae are attached, and the two ends of the rope are fixed on the seabed, so that the rope is kept at a certain distance from the seabed. This method is simple and can adjust the cultivation water layer according to the degree of transparency.

  Because macroalgae can be used to extract algin. Manufacturing colorful plastics and fiberboards can also be used as raw materials for the pharmaceutical industry. Therefore, in today's poor environment for fish farming, a new marine economic model of macroalgae farming has emerged in Canada, the United States and Mexico.

  China has done a good job in this regard. Marine scientists successfully introduced macroalgae from Mexico as early as 1978. In recent years, many farms in the southern coastal areas have been cultivating macroalgae, and the profits have been considerable.

  Qin Shiou read the information, China has developed very well in the macroalgae breeding industry, and domestic oceanographers have developed a set of macroalgae submerged raft breeding technology.

  In this technology, the aquaculture raft is suspended and floated with a rope to the raft to sink the floating raft to the water for macroalgae cultivation. Now some farms in Canada and the United States are using this technology.

But he can’t use such a technique. Although this technique is very good, because macroalgae are more sensitive to light, the sun's illuminance is different every day, so by controlling the submarine rafts by often telescoping the ropes, they can always be in the best water layer for breeding. The best absorbs sunlight and grows faster.

  This kind of technology requires a lot of workers. Daqin Fishery cannot hire so many workers to adjust the position of the submerged raft, and he is not a professional seaweed farm. After the environment of this fishery improves, he will still raise fish.

  After the macroalgae successfully survives in a sea area, it can be transformed into a submarine forest, covering the entire sea area, creating a natural high-quality fishing ground, which is very attractive to some precious seafood such as tuna, sea cucumber, abalone and so on.

  The submersible raft he bought usually sinks 3 meters to 7 meters underwater after falling into the water. In the early spring, the amount of sunlight in this water layer is more suitable.

After waiting for a period of time, as the macroalgae grow, they will need more and more sunlight. At this time, there is no need to manually control the macroalgae. There are air sacs in the leaves of the macroalgae. When they grow up, they will slowly float up with the submarine. Adjust the water layer to grow.

  The submerged rafts were dropped, Qin Shiou waved his hand, and the fishermen yelled on the Fengshou, and then drove into the sea. They were about to work.

  The next thing to do is to provide a climbing frame for the macroalgae. As I said before, the leaves of the macroalgae will float on the water surface to absorb the sun when they mature, but the buoyancy is limited after all. It is better to provide a climbing frame.

  In addition, the climbing frame has a more important function, that is, collecting the landing points of macroalgae. In the future, these macroalgae will be collected to make fish feed, and it is convenient to collect them when there are landing points.

  Qin Shiou has never done this job. In the past, we used to stock macroalgae in the Daqin fishery without providing a climbing frame. Anyway, those seaweeds do not need to be collected. They can grow slowly and survive at will.

  The purpose is different. It won't work in the No. 2 fishing ground. Macroalgae have become economic products, and it takes the shortest time for them to mature. (To be continued~^~)