1501. New Pasture

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

After this plane appeared, two more agricultural planes appeared. Bill helped him to contact them. The establishment of a sea ranch is no easier than a grassland ranch. For such a large area of ​​sea, it is too efficient to rely on just one plane. slow.

Sowing seaweed has officially begun, but it is not seaweed species that the plane is spraying now.

Although every time you buy seaweed, you use "seeds" to measure and call it. In fact, these are not seeds in the traditional sense. Seaweed does not produce seeds, but reproduces by dividing spores. Airplanes drop spores with vitality.

Qin Shiou has seen agricultural companies cultivate seaweed spores before. They all use plexiglass plates or plastic films as the spore attachment base. After the spores are collected, they are cultivated indoors by the inclined-plane flowing water method. The embryospores are cultivated and then peeled off. sowing.

Because he was eager to produce results, the seaweed seeds he bought this time were not microspores, but micro-mature bodies that had been cultivated in the farm. This kind was cultivated indoors with ropes as the substrate, and the young sporophytes were cultivated. It grows to 1 to 2 cm.

The agricultural plane flew over, and Qin Shiou firmly held up a transparent umbrella, obliquely blocking it in front of him. A group of fishermen yelled and looked for something to block themselves, and those who couldn't find anything turned their backs to the sea.

After the plane flew to the surface of the sea, the launch port was opened, and a white curtain appeared immediately, and white powder fluttering down with thick smoke, which made the sea water even more turbid after falling into the water.

These things are lime, so that's why they have to avoid them.

The first batch of seaweed to be put in is macroalgae. The sporophytes of this thing are very delicate and delicious. It is one of the favorite foods of sea urchins, starfish, and various benthic shellfish.

Lime is put in for two purposes, one is to change the pH of the seawater and inhibit the activity of these organisms that eat giant algae in the sea; the other is to play a bactericidal effect. The inner bay cannot enter the living water, and the metabolic rate of the seawater in it is too slow, causing the death of fish, shrimp and seaweed. After rotting, it could not be taken away. Accumulation in these places feeds a large number of bacteria.

Seaweed is a small expert in seawater purification, but their sporophytes are very sensitive. Why does this bay have good conditions for the growth of seaweed, but there are not many seaweed growing on the seabed? The reason is here. There are so many bacteria that many sporozoites cannot survive.

The spores of macroalgae have strong cold resistance, so they can be released casually in winter and spring. Now is the best time to release macroalgae spores. According to the time, the fastest time for them to grow happens to be summer. At that time, their need for sunlight and nutrients reaches its peak, and the summer weather can just meet their growth needs.

Three planes made two round trips, and the lime powder they dropped covered a sea area of ​​about a hundred square kilometers. This sea area was the deepest place in the sea. Outside the mainland, giant algae could grow in waters hundreds of meters deep.

Lime powder is put in, and then the cultivated sporozoites will be put in. Of course, this is not like spreading seeds on land, just sprinkle these sporophytes.

Macroalgae are somewhat like loofahs, grapes and the like. They need to cling to something to grow faster. If they are floating in the sea, they will probably drift to nowhere after a few big waves...

The agricultural planes dropped pieces of submerged rafts, which are triangular and umbrella-shaped culture rafts made of plastic frames and plastic ropes. There are substrates for the rapid growth of macroalgae sporophytes, which can provide the initial stage for sporophytes. The energy needed for growth can also become a clinging material for mature macroalgae.

China adopts the diving rope method, that is, plastic ropes are used as the substrate to attach macroalgae, and the two ends of the ropes are fixed to the seabed. Keep the rope at a certain distance from the bottom of the sea. This method is simple and convenient, and can adjust and cultivate the water layer according to the transparency.

Because macroalgae can be used to extract alginate, make colorful plastics and fiberboards, and can also be used as raw materials for the pharmaceutical industry. Therefore, under the current bad environment for fish farming, Canada, the United States and Mexico have all emerged as a new marine economic model of macroalgae farming.

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 has read the information, and China is doing very well in the macroalgae farming industry. Domestic oceanographers have developed a set of macroalgae submerged raft culture technology.

In this technology, the floating raft is connected to the rope by hanging the float and the raft, and the floating raft is submerged under the water for macroalgae cultivation. Now some farms in Canada and the United States are using this technology.

But he can’t use this technique, although it’s a very good technique, because giant algae are sensitive to light, and the sun’s illuminance varies from day to day, so controlling the submerged raft by often stretching and connecting the rope can keep them in the best water layer for breeding. The best absorb sunlight and grow faster.

This technique requires a large number of workers. Daqin Fishing Farm cannot hire so many workers to adjust the position of the submersible raft, and it is not a professional seaweed farm. After the environment of this fishery improves, he will still raise fish.

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

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

After a period of time, as the giant algae grow, they will need more and more sunlight. At this time, there is no need for artificial control. There are air pockets in the leaves of the giant algae. When they grow up, they will pull the submerged raft and slowly float up. Adjust the water layer in which to grow.

The submerged rafts were launched one after another, Qin Shiou waved his hand, the fishermen yelled and boarded the Harvest, and then drove towards the sea, they were about to work.

The next thing to do is to provide the giant algae with a climbing frame. As I said before, after the macroalgae matures, the leaves will float on the water to absorb sunlight, but the buoyancy is limited after all, so it is better to provide a climbing frame.

In addition, the climbing frame has a more important function, which is to collect the landing points of macroalgae. In the future, these macroalgae will be collected to make fish feed, and it is convenient to collect them if they have landing points.

Qin Shiou had never done this job before. He used to stock giant algae in the Daqin Fishing Ground without providing a climbing frame at all. Anyway, those seaweeds don't need to be collected, they can grow slowly and survive at will.

The purpose is different, and it will not work in the No. 2 fishing ground. Macroalgae have become economic products, and they must be matured in the shortest time. (To be continued.)

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