Chapter 1835 Interview Passed
Zhou Zhi came here originally wanting to ask for help, and wanted to persuade Liu Liangzhen to recruit several local assistants as technicians to sow the seeds of popularizing agricultural technology in Lianhe Township. Now Liu Liangzhen said it before she mentioned it, which shows that she is also considering this issue.
“Cutting propagation attaches great importance to the selection of mother trees and cuttings. Mother plants should be pure varieties, vigorously growing, and robust plants less than 20 years old. For cuttings, choose strong branches growing at the top of the crown and on the sunny side. Hard. For branch cuttings, two-year-old strips are best, and one-year strips are the best. If it is too tender, it will grow poorly and bear fruit late; for young branch cuttings, you should choose the semi-lignified branches that are grown in the current year. "
"There are two methods of cutting: long cuttings and short cuttings. For direct planting in arid areas and gardens in the north, use long cuttings of one meter. About. We have done experiments in Lintong, Shaanxi Province, using the method of digging a trench that is 50 to 70 centimeters long and 30 to 50 centimeters deep, and inserts two holes into the soil about two-thirds of the way."
“In Zhejiang Province, we have tried short-term cuttings, but the hard technique is to use long-term cuttings. Fifteen to twenty centimeters; the young branch cuttings are four to five centimeters long, and several small leaves on the top are retained." Liu Liangzhen seemed to be explaining the cutting technique to Zhou Zhi, and then suddenly asked: "I just said hard cutting. What kind of branches should I choose? ”
Zhou Zhi was connecting the cables of the pot lid. He was afraid that the workers would not be able to do this well, so he took over after the pot lid was installed. Hearing this, he said, "Didn't you just say that you want to use two-year-old branches? One-meter-long branches." , buried two-thirds of the way."
Liu Liangzhen smiled: "You really don't delay, you are quite suitable to be a technician."
"Hey, Grandma Liu just said that. Is it an interview? "
"The interview is not over yet, so guess what method we will use in Lianhe Township."
"It must be short-term. "Putting." Zhou Zhi was very sure: "Because you just said that you are going to try to use the branches that were harvested in autumn, that is, to top them, and the ones you cut are all annual new branches."
"The other thing is that we need to expand the scale to the maximum extent. Of course, we must try to propagate the most saplings from the branches. A one-meter-long branch is equivalent to four or five 20-centimeter hard spikes, and at the same time, there can be at least three or four saplings. The branches are four to five centimeters long, which is equivalent to a deep cutting of about one meter. You can even out ten small saplings.”
“Also, you just said that the long-branch cuttings were made in Shaanxi Province and the short-branch cuttings were made in Zhejiang Province. This shows that short-branch cuttings are sensitive to temperature. Certain requirements.”
“Although the climate in our Lianhe Township is not good in summer. It is as hot as Jiangsu and Zhejiang, but the temperature in autumn and winter is very warm. If mulch film can be used, the sunshine here is enough to raise the ground temperature by a lot. In other words, the climate in autumn and winter in Lianhe Township should be the same as that in Jiangsu and Zhejiang. Close.”
“To sum up, I I think the Academy of Agricultural Sciences is definitely going to try short-branch cuttings that can propagate faster in our Lianhe Township."
Liu Liangzhen nodded: "Being able to name so many considerations shows that I have used my brain. , you, the technician, have passed the interview!”
"As you said, short cuttings are more suitable for large-area cultivation. To quickly expand the base, you must use young branch cuttings."
"But the technical requirements for short branch cuttings are much higher, especially Pay attention to shading and heat preservation, and the temperature should be controlled between 18 and 18 The humidity should be maintained at about 90% between 33℃. "
"The black mulch film you just mentioned is something we didn't expect. The temperature here in autumn is about 12 degrees, so we only use it. The ground temperature needs to be increased by six degrees to meet the conditions." Liu Liangzhen said: "Your idea of black mulch film is really good. How did you come up with it?"
"People in Liangshan Prefecture are accustomed to using solar water heaters. The most important component of the water heater is the black heat exchange film. ...Eh, the country does not yet have Black mulch film?”
“It’s not that the country doesn’t have it…” Liu Liangzhen shook his head and said, “It doesn’t exist in the whole world.” Zhou Zhi was surprised: “This thing should be combined with carbon black through the mulch film matrix. Can it be produced? ”
“It’s a matter of our thinking.” Liu Liangzhen said with a smile: “Mulch film evolved from plastic greenhouses, then to small sheds, and then to mulch film covering. Before, there were light transmission requirements, otherwise It will affect the photosynthesis of plants. If the mulch film is used to increase the ground temperature, the black film is of course better than the colorless film. Better, eh...Does this kind of mulch also have the effect of inhibiting the growth of weeds? "
"It should be so." Because the black color is opaque, only the seedlings growing out of the opening. It can get light, but the light cannot penetrate from other places, inhibiting the growth of weeds. People who are engaged in agricultural technology can naturally think of it.
“I have to implement it to see if the production of this kind of mulch film is difficult...” Liu Liangzhen couldn’t wait any longer: “Such a good idea, why has no one thought of it before?”
"Grandma, please don't be busy, we still have a problem to discuss."
"What's the problem?"
"The problem of pollution." Zhou Zhi said: "The main function of the mulch film is to maintain heat and moisture, and improve the soil environment to facilitate sowing. But there is a problem, that is, if the thickness is too thin, it will not Conducive to recycling, this will lead to a large amount of plastic waste remaining in the soil, which seriously threatens the soil environment. "
"This is indeed a problem, and it is not a big problem yet. What is a good way? Should we learn from abroad and go How to develop degradable plastic films? "
"The cost of that may be too high, and it may not be possible to develop." Zhou Zhi thought for a while: "Can we use recyclable plastics and recycle them? The problem with plastics? ”
“On the basis of not changing the existing technology, the thickness of the film should be appropriately thickened to make it recyclable, and then recycled through waste collection channels, right? Can some of the problems be solved? ”
"Xuan, this will increase the cost and increase the burden on farmers. Another problem is that the thicker the film, the more the light transmittance will be affected. The black film we want is okay, but other films need to increase the thickness while maintaining transparency. , the technological content must be improved, and the price will naturally go up.”
When Zhou Zhi thought about it, it was really like this, and he couldn’t help but feel a little frustrated.
Liu Liangzhen comforted Zhou Zhi and said: "Science and technology are like this. First solve the problems that exist, and then solve the problems that follow. If you don't take the first step because of some obstacles, it is impossible. "I've made progress"
After that, he patted Zhou Zhi on the shoulder: "I'll contact Lu Province. , let’s see if it’s possible. If it really works, it will be considered a contribution to our country’s agricultural science and technology.”
It took a day to transfer the satellite mobile network, and it is actually not too complicated to move. , there is a switch between the two bases, so this satellite communication center can actually be shared by the two bases.
The only troublesome thing is Zhou Zhi. Before the dedicated communication line between the base and the grain station is established, he needs to drive to the base every day to "go to work" and manage company affairs.