Chen Jianzhang and Yao Jianyi returned to northern Jiangsu, where there was a saline-alkali land improvement test field in Jiagu.

The coastal saline-alkali land in northern Jiangsu is mostly medium and severe saline-alkali land, if the traditional method of controlling saline-alkali land is used, mainly to improve water conservancy projects, large flood irrigation and huge alkali drainage canal are the main forms, at least 5~7 years of desalination, salt washing time is not to mention, the effect is not obvious. In particular, once the flood irrigation is lost, the saline-alkali land will be saline-alkali again, and the land will return to the saline-alkali land.

The improved experimental field in Jiagu was transformed into fertile land by adding seaweed fertilizer and saline-alkali tolerant pasture.

Because there was no large-scale seaweed cultivation before, the seaweed fertilizer produced in the experiment was not much, so the improved experimental field was not large, only ten acres in size.

However, judging from the scene, the improvement effect is somewhat outstanding!

The experimental field was already overgrown with lush alfalfa, and it was growing well, while the surrounding saline wasteland was pitiful, with a few grasses growing sparsely.

"This saline land does not grow crops and has been abandoned for decades. Chen Jianzhang introduced familiarly.

Yao Jianyi asked: "It's all heavily saline-alkali land here, how long did it take Jiagu to improve this experimental field?"

Chen Jianzhang's face was a little strange: "It only took 1 year." ”

"1 year, what are you kidding?" Yao Jianyi knew that this land had not been flooded with water and washed with salt, and when he saw the alfalfa growing on it, he knew that it should almost return to normal standards. But...... It only took a year?

Chen Jianzhang didn't explain much, and pointed to the farmers around him: "Well, they are all witnesses. ”

Yao Jianyi really turned his head and communicated with the farmers around him.

"But no, everyone is talking about God!" Hu Shu, a farmer in northern Jiangsu, exclaimed: "When I saw someone opening up experimental fields here to improve saline-alkali land, no one took it seriously. In particular, no salt discharge measures were taken in this experimental field, and I did not expect to have a harvest in the first year......"

According to him, everyone is not uncoveted for this vast saline-alkali land, and there are also local people who have contracted to develop it. However, before planting crops in moderately or severely saline soil, the site must be salted at least two or three times, which is too costly. And after two years of planting, the gains outweigh the losses, so they are abandoned.

In Hu Shu's view, in such a region with a high degree of salinity, it is completely impossible to achieve a harvest through the first year of improvement. Because a lot of farmland from ancestors has gone through this routine: "The first year of improvement loses money, the second year has a little harvest, and the third year can barely balance ......"

"So everyone was delighted and curious about the results of the experimental field, no, they all came to join in the fun. The farmers present all nodded.

Yao Jianyi returned to Chen Jianzhang with a slightly complicated mood and asked, "Don't tell me, it's all the credit of seaweed fertilizer." ”

Chen Jianzhang smiled: "Of course, it is inseparable from the credit of seaweed fertilizer, but in addition, there is another key is this pasture." ”

"Grass?"

"Yes, this is no ordinary pasture, you've heard of the 'salt-eating' plant, right?"

Yao Jianyi thought for a while: "You mean salt-tolerant plants like Suaeda salsa and Salina grass?"

Chen Jianzhang nodded: "That's right, this is the 'salt-eating' alfalfa variety cultivated by our group, which has a strong ability to tolerate salt and alkali. According to our test, 400 kilograms of salt can be taken away from each acre of land every year, which is difficult for us to achieve by manual means. ”

Yao Jianyi exclaimed: "I really didn't expect ......"

The first 10,000-head pasture established by Jiagu was to introduce a batch of saline-alkali tolerant alfalfa varieties and plant them on improved saline-alkali land. Later, through the moistening of the spirit array and the further cultivation, domestication, screening and research of the laboratory, this kind of "salt-eating" forage grass that can grow in heavily saline-alkali land was obtained.

"When we looked at these 'salt-eating pastures', we found them very interesting. 'Eating salt pasture' can not only green saline-alkali land and improve soil quality, but also become the best feed for raising livestock. Chen Jianzhang said with a smile.

These "salt-eating pastures" not only grow very well, but what makes Chen Jianzhang and them happy is that cattle and sheep especially like to eat this grass. Because grass contains a lot of salt, there is no need to feed them salt when raising cattle and sheep.

"What is the effect of seaweed fertilizer......

Chen Jianzhang said: "How else can we say that seaweed fertilizer is a perfect match for this 'salt pasture'?"

"On the one hand, the phenolic polymers and betaines in seaweed fertilizer regulate the osmotic pressure of forage cell sap and chloroplasts, protect a series of enzymes from being converted into active resistant chemicals in the cells of forage grass damaged by salinity, drought and cold, and enhance the adaptability to saline-alkali land. ”

"On the other hand, the special ingredient in seaweed fertilizer, seaweed polysaccharides, can chelate the salt ions on the soil colloids, increase soil permeability, and under the action of irrigation water, the soil salt separators are more likely to be discharged by runoff or leached deeper soil, realizing the rapid desalination of the surface layer. ”

"This experimental field is a combination of the two, to achieve the improvement of saline-alkali waste land, planting in the same year, and high yield in the current year, and at the same time absorb the salt in the saline-alkali land, so as to achieve the reality of saline-alkali land into fertile land. ”

"It only takes one or two years to reduce the salinity content in the field to the extent that rice and other food crops can be planted, even if you no longer plant 'salt pasture', rice can achieve high and stable yields, and continue to apply seaweed organic fertilizer, you can increase the yield year by year, stabilize the yield ......"

Yao Jianyi smacked his lips and praised from the bottom of his heart: "Amazing results! You guys are also amazing!"

As a native of Suzhou Province, he still doesn't know? In the coastal areas of this province alone, there are millions of hectares of saline-alkali land, and once it can be improved into fertile land suitable for growing economic and food crops by planting "salt-eating pasture" from Jiagu and applying seaweed fertilizer, how inspiring it will be in the context of today's dwindling arable land.

In this regard, Chen Jianzhang said: "More and more places have paid attention to 'eating salt and pasture', which makes us feel more responsible for ourselves. The Jiangsu provincial government is also willing to cooperate with us with a large area of saline-alkali land, hoping that we will transform the wasted saline-alkali land and turn it into a thousand miles of fertile land. ”

"The cultivation, planting and technology promotion of the new variety of 'Salt Eating Forage' are still waiting for the large-scale production of seaweed fertilizer. ”

Yao Jianyi thought for a moment and took the initiative to speak: "I have some research on the moss, I don't know if I can cooperate with Jiagu?"

Chen Jianzhang was overjoyed: "Of course, welcome to the extreme!"

What did he put so much effort into receiving Yao Jianyi for? Isn't it just for this? Although there is a shortage of marine talents in the Jiagu system, and although certain results have been achieved in the cultivation of mutant moss, there is still a lot of effort to optimize its breeding technology and mode and build a mature technical system for the construction of algae farms in marine ranches.

Yao Jianyi is a well-known oceanographer, and his participation in the cooperation can give full play to the supporting role of Jiagu Marine Ranch.

Yao Jianyi really felt Chen Jianzhang's welcome and was in a good mood.

But he immediately realized a problem: "I have some experience in seaweed domestication and cultivation, but I remember that the reproduction induction of mutated moss requires yew extract, right? This is a bit of a luxury, can Jiagu guarantee the supply of yew extract?"

Chen Jianzhang smiled lightly: "Rest assured, our group has started the construction of the yew base......"

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