analyse
1. These trees are relatively easy to plant. The climate is warm this year, so according to the general situation, more than 90% of the trees should survive, but in fact they are not.
From the investigation, I found that most of the small trees are close to wooden chairs and aisles. Although these are convenient for us, there are also many problems, such as poor environmental sanitation.
conclusion
The main causes of abnormal death of young trees are:
1. People don't pay attention to hygiene in high-rise buildings, and throw leftovers down, which makes young trees unacceptable and leads to death.
People lean heavy objects against trees, so that young trees die prematurely.
A lot of facts tell me that the death of young trees is mostly caused by human factors. Because there are too many dead trees, garden workers have to invest more money in replanting every year, which is a waste.
Kenichi
Garden management should lead everyone to protect flowers and trees, and make a "book of protecting greening achievements" with every household, and formulate some specific measures to protect trees with prizes and destroy trees with penalties.
2. The composition of primary school students-the investigation report on the cause of death of Xiaoshu Why Xiaoshu died 1. The cause of the problem is that there is a market on Panjiayuan East Road in front of my house.
There are no trees on both sides of the road, which are bare. In summer, walking through here makes people feel uncomfortable in the sun.
This spring, gardeners planted many locust seedlings on both sides of this road. After the spring rain and sunshine, the young trees germinated and grew green leaves. I can't tell you how happy I am to see these little trees grow up day by day.
However, after the summer, I found this situation: some small trees are not as vibrant as before, but withered; Some young trees have lost their leaves and become bachelors; Some small trees were simply sawed off, leaving only a small stump. I think it's strange. Why do young trees planted in spring die so fast? Are you sick? What happened to you or were you killed? So, I made a survey during my summer vacation.
I want to find out the cause of the death of young trees, so as to avoid the same fate for the trees planted in the future. Second, the measurement method First of all, I measured the tree spacing and planting belt length in Panjiayuan East Road. Then I counted the number of new species of Sophora japonica, the number of living trees and the number of dead trees, investigated the surrounding environment and geographical location of new species of trees, took photos and drew topographic maps.
Finally, I visited Chaoyang District Garden Bureau and Panjiayuan Sub-district Office Greening Office. Instrument: Tom 8 18 Fool Camera Time:1August 25th, 993 ~ 1993165438+1October 30th Wednesday. Survey results 1. 1993 statistics of new trees in Panjiayuan East Road.
Variety price, planting belt length, interspecific distance, survival number, death number percentage, total Sophora japonica percentage 2 1.55 yuan, 300m, 5m, 89 plants 70%, 39 plants 30%, 128 plants 2. Panjiayuan area: 4.4 square kilometers. 3. The number of trees planted in Panjiayuan area increased from 65438 to 0993: 29482.
4. Main tree species in Panjiayuan area: Sophora japonica, pine, poplar, Ailanthus altissima, Torch Tree, Bubble King, Boxwood, etc. 5. Statistics of surrounding environment of dead trees: other locations (trees) in front of snack bars, food stalls, meat stalls and individual clothing stalls 12 17 6 2 2 percentage (%) 3 144 1556. Geographical distribution map of new trees on Panjiayuan East Road and Panjiayuan Road 1993.
Investigation and analysis 1. The new tree planted in front of my house this year is Sophora japonica. Sophora japonica is a city tree in Beijing, which is cold-resistant and drought-tolerant.
The climate is average this spring, and the quality of saplings is excellent. The spacing between trees is 5 meters, which is more suitable. No damage of pests and diseases to saplings was found. Therefore, according to the normal situation, more than 95% of the seedlings should survive, that is to say, only 6 of the newly planted 128 trees this year should not survive.
However, as can be seen from the table, 39 young trees died, 33 more than normal, and the survival rate only reached 70%, indicating that some trees did not die normally. As can be seen from the table, 75% of the dead trees are located near individual snack bars, food stalls and meat stalls.
It seems that dead trees have something to do with these individual stalls. It turns out that there is a "Panjiayuan East Road Market" from Jinsong South Road to Panjiayuan Road, where individual industrial and commercial households, vegetable farmers and foreign vendors set up stalls, which is convenient for us to buy things, but it also brings many problems.
Such as: poor sanitary conditions, garbage everywhere, sewage cross-flow, stinking. The newly planted young trees are next to these stalls. Through field observation and visiting the garden department, I think the causes of abnormal death are as follows: 1 Individual snack bars pour hot water, oil, water and sewage from jiaozi into tree pits.
The pots and fires they used for cooking were less than l meters away from the young trees, so that the young trees were roasted by fire and smoked with oil as soon as they were planted, causing the young trees to die; 2. Some individual clothing stall owners use small trees as hangers, which make the small trees bear the weight of heavy pulling prematurely, resulting in unstable foundation and death; 3. The tofu seller pours brine into the tree pit, so that the young trees are poisoned and die; 4. The butcher dumped the minced meat and oily sewage into the tree pit, resulting in the death of young trees; 5. At the gates of some buildings and courtyards, many young trees were killed because of many passing vehicles; 6. Some people lean heavy objects on small trees, or hang or rely on many signboards and tricycles to let small trees die; 7. Some stall owners only care about immediate interests. In order to make their own site bigger, they fill the tree pit with large cement blocks and bricks, so that the young trees will not die after absorbing water; 8. I saw some people waving around or chatting with their backs against the small trees, which made the foundation of the small trees unstable. V conclusion 1. A large number of facts and pictures tell me that the cause of death of the small trees in front of my house is not natural disasters but man-made disasters, and most of them are caused by human factors, which has a great relationship with the market in Panjiayuan East Road.
Some owners of individual snack bars, food stalls and meat stalls don't care about trees, but only care about a little immediate interests, intentionally or unintentionally destroying the greening achievements, which has affected the greening work of Panjiayuan East Road to some extent. 2. There is no farmer's market in Panjiayuan Road at present, so the survival rate of new trees is over 95% this year, which also proves the influence of farmer's market in Panjiayuan East Road on trees.
3. Not all the trees in front of individual stalls are damaged, but due to the abnormal death of a large number of trees, the garden department should increase investment in replanting every year. If calculated by the price of Sophora japonica, Panjiayuan Community will plant about 30,000 trees every year, with a loss of 200,000 yuan, which is really a huge waste.
6. It is suggested that the garden department and the market management department should strengthen cooperation and resolutely stop the unhealthy trend of destroying trees. It is necessary to sign a "greening achievement protection contract" with individual stall owners, and formulate some specific measures to ensure that some people will be rewarded for protecting trees and punished for destroying them.
2. Starting from the quality of personnel, educating individual stall owners should not only consider personal accounts, but also consider long-term interests and the big accounts of the country and the people. Establish and improve the education and publicity system.
3. Call on all people to find the problems existing in greening in time, report to relevant departments in time, and urge vendors to stop the destructive behavior in time. I took part in a meaningful survey this time, from which I learned a lot of knowledge and improved my ability to observe things and analyze problems.
With the guidance of teachers and the help of parents, I learned the methods of measuring distance, drawing maps, making tables and writing papers, as well as the knowledge of decimal point, percentage and survival rate. In addition, I also actively reflect the situation to newspapers and radio stations. As a result, the Beijing People's Broadcasting Station broadcast an interview with me, and the Beijing Evening News also reported the results of the investigation.
I want to write Unit 3, Grade Four. My investigation report is about the use of pocket money by primary school students. Now the society is more developed than before, and families are richer.
Mom and dad's salary is either 1000 or more than 2,000 to 3,000. With the development of society, the requirements for students are getting higher and higher.
Therefore, children can ask their parents for pocket money at will. However, what do they want to buy with the money? I made an investigation report with doubts.
I find that spicy food and barbecue are the most popular among children. There are always people around the booth, which makes it crowded with people.
There are also some toys that sell quickly, such as Transformers, Barbie dolls, combat gyroscopes, and Koro, all of which are children's favorite toys. Some children also like to compare with others and spend money on things that are more expensive and beautiful than others.
There are also some children who take money to buy prank items to scare their friends. Analysis 1. At school, students holding mala Tang and barbecue can be seen everywhere.
Perhaps, spicy food and barbecue are the main culprits for students to spend money indiscriminately. Toys are indispensable things in people's childhood.
The cost of toys also accounts for most of our students' pocket money. Most students like to take toys to school.
This will not only affect the study, but also violate the school rules. Conclusion After my investigation, I know that many children almost ask their parents for money in the name of buying breakfast, and then buy snacks and toys at street stalls. Some people even take money to Internet cafes and don't even eat breakfast.
Such behavior not only affects our health, but also affects our study. I suggest that schools should take better measures to prevent this phenomenon from happening again, strictly manage students' campus diet and pay attention to children's health.
Only in this way can the flowers of the motherland bloom more brilliantly.
4. How to write pocket money for primary school students by imitating the investigation report on the death of young trees in Grade 4 1 1 class?
Today's society is more developed and families are richer than before. Mom and dad's salary is either 1000 or more than 2,000 to 3,000. With the development of society, the requirements for students are getting higher and higher. Therefore, children can ask their parents for pocket money at will. However, what do they want to buy with the money? I made an investigation report with doubts.
survey
I find that spicy food and barbecue are the most popular with children. There are always people around the booth, which makes it crowded with people. There are also some toys that sell quickly, such as Transformers, Barbie dolls, combat gyroscopes, and Koro, all of which are children's favorite toys. Some children also like to compare with others and spend money on things that are more expensive and beautiful than others. There are also some children who take money to buy prank items to scare their friends.
analyse
1. At school, students holding mala Tang and barbecues can be seen everywhere. Perhaps, spicy food and barbecue are the main culprits for students to spend money indiscriminately.
Toys are indispensable things in people's childhood. The cost of toys also accounts for most of our students' pocket money. Most students like to take toys to school. This will not only affect the study, but also violate the school rules.
conclusion
After my investigation, I know that many children almost ask their parents for money in the name of buying breakfast, and then buy snacks and toys at street stalls. Some even take money to Internet cafes and don't even eat breakfast. Such behavior not only affects our health, but also affects our study.
suggestion
I suggest that schools should take better measures to prevent this phenomenon from happening again, strictly manage students' campus diet and pay attention to children's health. Only in this way can the flowers of the motherland bloom more brilliantly.
5. Primary school students' composition-an investigation report on the death of young trees. There used to be a concrete floor between the fifteenth and sixteenth buildings in my community, but there were no flowers and trees. Last spring, the gardeners planted trees on the concrete floor and put some wooden chairs on them. This is a good place for people to rest. But in summer, I found that many trees died. I think it's strange. Why did the young trees planted last year die so fast? Yes, I have investigated this problem. In the investigation, I measured the distance between trees and the length of planting belt with a long ruler, drew pictures and took photos. In a 90-meter-high garden, plant a banyan tree every ten meters. Only three taller trees survived, and all the others died. According to analysis, 1. These trees are relatively easy to grow. The climate is warm this year, which should be under normal circumstances. Actually, it is not. In my investigation, I found that most small trees are close to wooden chairs and aisles. Although these are convenient for us, there are still many problems, such as poor environmental sanitation ~ ~ Conclusion The main causes of abnormal death of young trees are: 1. People don't pay attention to hygiene in high-rise buildings, and throw leftovers down, which makes small trees unacceptable and leads to death. 2. People lean on heavy objects. A lot of facts tell me that the death of young trees is mostly caused by human factors. Because there are too many dead trees, garden workers have to invest more money to replant them every year, which is a waste. The management of building a garden should lead everyone to protect flowers, plants and trees, and make a "book of protection and greening achievements" with every household, and formulate some specific measures to ensure that trees are rewarded and destroyed.
6. I don't know what is the investigation report on the death of young trees in the fourth grade of Chinese? There are teaching plans. This is a survey report. Through the investigation and analysis of the death of young trees, the author draws the conclusion that the death of young trees is mostly caused by human factors and has a lot to do with the market. Finally, he made some suggestions. Take corresponding measures to protect the greening achievements. First, set questions to attract students' attention. In fact, this text is very close to students' life. I want to cultivate students' observation ability, so I set these questions to attract students' attention and stimulate their interest in learning: Why did the author write an investigation report? How can it be puzzling that the locust tree, which is still full of tender leaves in spring, quietly died in the midsummer when it should be flourishing? This is the reason why the author made the investigation report. We are glad that the young author finally found the cause of the death of the young tree through his own efforts. However, considering the serious consequences, we are worried. See if the young author has any good ideas. What good suggestions will you have? Second, cultivate students' ability to do it themselves. At the same time, I also let students practice searching information on the Internet to cultivate their self-study ability, which has achieved good results. The main purpose is to ask students to check the life habits of Sophora japonica, which is the city tree in Beijing. It is cold-resistant and drought-tolerant. Suitable for growing in the north and finding pests and diseases. What is the real cause of the death of young trees? Third, cultivate students' desire to explore. Practice is the best way to satisfy and release children's desire for discovery, research and exploration. The teaching design of this course is oriented to nature, society, students' life and existing experience, which promotes the development of students' ability in open time and space, increases students' experience of nature, society and self, and develops students' practical ability. The teaching focus of this lesson is on the basis of students' understanding of the text. Learn how to write investigation report, master the writing method of investigation report, guide students to explore the significance of investigation report in teaching, let students learn to find valuable problems in life, and help students master the methods of investigation: measurement, statistics, drawing, interview, questionnaire, etc. , so that students can get information smoothly in the investigation, arrange students to investigate the growth of trees around their homes according to the actual situation, and put forward their own reasonable suggestions for the existing problems. On the basis of mutual communication, we can broaden our thinking, find more meaningful problems and learn something. Disadvantages: There are a lot of teaching contents in this course. If students want to fully understand it, teachers need to be patient. Some students can't be taken care of by teachers, so teachers should pay attention to them in future teaching.
7. Investigation report on the cause of death of young trees in the second volume of the fourth grade This investigation report includes several parts, each of which includes (investigation reasons) and (? Investigation), (analysis), (conclusion), (suggestion).
? In the first part, the author first tells the reasons for his investigation: First, "I" especially like the small trees on both sides of the road, which can be seen from "I am so happy to see the small trees covered with green leaves"; Second, in midsummer, "I" found that some small trees withered, some small trees became sticks, and some small trees were only semi-finished products. "I" felt very strange, so I came up with the idea of investigating the cause of death of Xiaoshu.
? The second part is the investigation. Write the process and method of investigation first.
In the field investigation, the author used the methods of speed, statistics, drawing and taking pictures to make a detailed investigation. ? The third part is the analysis of the survey results.
Write two points here: the first point is that these Sophora japonica are of good quality, and the climate is good this year, and no pests and diseases have been found. The second point is that most dead trees are near the market.
? The fourth part is based on the conclusion of investigation and analysis. Firstly, four causes of abnormal death of young trees are discussed in detail: first, young trees are often scalded by water, roasted by fire and smoked; Second, young trees bear loads too early, which leads to unstable foundation and death; Third, young trees can't absorb water and die; Fourth, the young tree was killed by a collision between people and cars.
Then the important conclusion is that the death of young trees is mostly caused by human factors and has a lot to do with bazaars. The fifth part is the author's suggestion.
The author suggests that relevant departments strengthen cooperation, resolutely stop the bad phenomenon of tree destruction, sign a "greening achievement protection contract" with each stall owner, and formulate some specific measures to ensure that tree protection will be rewarded and tree destruction will be punished.