The 2,000 poplar trees were a batch of saplings that Lin Quan attached great importance to, and under his personal guidance and supervision, the workers quickly planted these saplings. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Because this batch of saplings was just bought by him from the system store, eliminating the transfer link, so after the saplings were planted, they were in good spirits, plus some supporting measures to protect them, so the survival rate of these two thousand poplar trees was very high, and the survival rate was 95%, which Lin Quan never expected.

I didn't expect the survival ability of the poplar tree to be so strong, then it seems that the planting area of the poplar tree can be expanded next year, the economic system of the poplar tree is slightly worse than the sea buckthorn tree, the main reason is that it has no fruit, but the poplar tree also has its own great use.

Because it is a large deciduous tree, so windbreak and sand fixation, soil erosion prevention and control ability is very strong, this is the sea buckthorn tree can not compare, after all, the height of sea buckthorn is only more than one meter high, and in addition, the leaves of the aspen tree are dense, can improve the climate, the temperature in the desert area is very high where there is sun, and the temperature will drop a lot in places without sun, many plants that are not suitable for planting in strong light, such as some legumes, this plant can improve soil quality, absorb and transform nitrogen in the air, increase soil nutrients, and have strong economic benefits。

In ancient times, because there was no chemical fertilizer, so the grain output has not been able to go up, a field can not be cultivated continuously, because then the fertility of the soil will decline rapidly, some places at the beginning of the land yield is very high, but after two or three years of continuous planting, it will not work, so in many places in the north, only one season of wheat is planted a year, and the rest of the time is used to raise the field, so the yield of wheat is higher than that of the paddy field of two seasons of rice in the south.

However, if they interplant a batch of soybean plants, the fertility of the land will not be greatly affected, and the yield will still be high next year, mainly because soybean plants can fix nitrogen.

Ancient people did not know nitrogen fertilizer and did not know the principle that soybean rhizobia can fix nitrogen, but they knew this method of increasing yield, as early as the Tang Dynasty, Tang Gaozong has set up a special research agronomy institution, these people have internal affairs to pay, in the Ministry of Industry name, to the royal garden and Chang'an outside the fief as a research site, agricultural research, they even came up with hybrid rice this kind of thing, but unfortunately can not be promoted.

The planting of soybeans can increase the yield of the field, which was also studied in the Tang Dynasty, so soybeans were very popular in the Tang Dynasty, and even Meng Xu, the originator of dietary therapy, introduced the function of soybeans in the book "Dietary Therapy Materia Medica": "Nourishing Qi and moisturizing the skin".

Soybean is not a desert type of plant, can not be planted directly in the desert, it is suitable for growing at a temperature of about 20-25 degrees, and the requirements for water are relatively high, and the temperature in the desert area during the day may soar to more than 40 degrees, water evaporation is very fast, soybeans are almost not distributed in Africa, let alone in the desert area of Niger.

So at the beginning, Lin Quan thought of soybeans, and conducted an experiment in the vegetable garden where he worked, and found that this plant could not survive here, and the yield of a few soybeans that were barely planted was very impressive, one plant only produced five soybeans, and the other plant only produced one pod.

But now that you have poplar trees, you can plant some soybeans under the shade of the aspen tree, although the leaves of the aspen tree will block most of the light, and the lighting of the soybeans will not be very good, but the leaves of the aspen tree can also shield it from the sun, so that the temperature of the shade below it will be much lower than the sand outside, so that the soybeans can survive.

In addition, the aspen tree is not completely without economic value, when it grows up, the straight trunk can be sold, there are not many trees in Africa, Africa is best known for the savannah, not the rainforest, but neither of these two has anything to do with Niger, which is located in the desert region.

Their country is full of yellow sand, there are neither grasslands nor rainforests, it is rare to see tall and straight trees, and Niger is far from the sea, so even the coconut palms that are common in West Africa are basically not visible, and they can use very little wood, whether it is to make furniture or do anything else, most of the wood they need is imported.

And since it needs to be imported, the timber from Lin Quan Farm must also be sold, so I don't have to worry about the market.

He didn't plan to plant these poplar trees for a long time, there were many other trees inside the farm, and when these trees grew up, the area of the farm would be expanded to the outside, and the poplar trees were too large, so they must be cut down to make way for other crops with higher economic value, which Lin Quan had planned for a long time.

The land in North Africa is quite cheap, because it is all desert, so there is no need to pay rent to the government to contract these lands, and the government will thank you for your contribution to his country, so Lin Quan can rest assured that he can boldly stake the land, as long as he can help the Nigerien government to green the desert in the north and transform it into fertile land that can be cultivated, then he has always had the value of cooperation for the Nigerien government, and the relationship between the two sides will always remain close.

Lin Quan never thought that the relationship between him and the Nigerien government could always be so harmonious, the two sides just used each other, since they have the value of use, then the other party will not dare to kick themselves, because they kick themselves, there is no one else who can replace them.

After 2,000 aspen trees were planted, the last 3,000 saplings were planted, but the quality of these saplings was so poor that the survival rate was very worrying, and the survival rate of 3,000 saplings was less than half, and only more than 1,400 saplings survived in the end.

But Lin Quan was already very satisfied with this achievement, and he could still plant 1,400 saplings under such difficult conditions in August, and they were of very poor quality, which was already remarkable in itself, and of course he had no way to ask too much.

Coupled with the poplar trees that survived before, the gap of 20,000 new saplings requested by Steiger's side was finally filled, to be honest, this request came too late, if Steiger's earlier proposal, Lin Quan could have completed it, and it would definitely be much easier to complete it than now!