At the annual meeting of the field station of the Chinese Academy of Sciences, Shi Erwei, the vice president of the Chinese Academy of Sciences, awarded the 2013 CERN Young Outstanding Paper Award for the ten young research stars.
“The Chinese Academy of Sciences awards 10 young scientists who are engaged in resource and environmental research every year. Most of the winners have performed well after that.†Shi Erwei spoke highly of them.
Zhang Weixin, an associate researcher at the South China Botanical Garden of the Chinese Academy of Sciences, received the award certificate. Under the guidance of Fu Shenglei, a researcher at the South China Botanical Garden, he collaborated with American scholars to discover the mechanism for promoting soil carbon sequestration. The related results were published in the journal Nature-Communication. And was selected as a highlight article.
Indissoluble bond with you
As a member of the restoration ecology team of South China Botanical Garden, Zhang Weixin graduated from the Ph.D. in 2008. However, his research on cockroaches can be traced back to 2003. He studied with the three researchers of Guo Mingxi, Li Jianxiong and Liao Chonghui from the Institute of Entomology in Guangdong Province, and engaged in the study of the relationship between carp community structure and vegetation. In the meantime, he followed the professor of the School of Agriculture and Biology, Shanghai Jiaotong University, Qiu Jiangping to learn the classification and identification, and discovered and named seven new species: Heshan Yuanxiao, Jiangmen Yuanxiao, Nanling cavity, and the top chamber. Dinghu Yuanxiao, Liao's distant blind and Chen's Dura.
In 2007, he went to the University of Georgia's Oldham Ecology Institute to study and engage in invasive ecology research, studied under Professor Paul F. Hendrix.
“Recovery ecology undertaken by Dr. Fu Shenglei is a discipline that studies the causes of ecosystem degradation, the techniques and methods of restoration and reconstruction of ecosystems, and their ecological processes and mechanisms. But the team of Fu Shenglei’s team Special attention is paid to soil organisms and soil bio-networks and their interaction with vegetation. Under his guidance, I have carried out some research related to ecological restoration with 蚯蚓 as the entry point.†Zhang Weixin told reporters that this is not a new field. The study of 蚯蚓 began in Darwin, but the problem is far more than the answer.
Different answers
The response and feedback of soil organisms to global changes is the frontier and difficulty of ecology. As an “ecosystem engineerâ€, its contribution to the ecosystem's carbon cycle has been widely debated. Previous studies have said that “plowing†soil will increase carbon dioxide emissions by 33%, and it has become one of the “culprits†of climate warming.
However, a large number of studies have shown that alfalfa can indeed improve soil fertility and is a "beneficial insect" for agroforestry production. It seems that at the same time it plays two contradictory roles. Today, as the trend of climate warming becomes more and more significant, the contradictions caused by cockroaches are tangled: should we increase soil fertility for free or reduce greenhouse gas emissions?
The results of Zhang Weixin and others seem to have found the key to understanding this contradiction. They found that stimulating carbon dioxide emissions and increasing soil fertility are two aspects of the same process, but an increase in carbon dioxide emissions over a given period of time does not necessarily mean that 蚯蚓 will be detrimental to the net sequestration of ecosystem (ecosystem) carbon. . “We compared the soil with flawless and flawless soil and found that it did not allow more carbon to run into the atmosphere, just let it go faster.†Zhang Weixin explained that after experiencing the initial faster carbon release. After the stage, the organic carbon in the innocent soil will slowly and continuously run into the atmosphere, but the carbon released from the soil to the atmosphere is less and less – through the complex biochemistry in the digestive tract. In the physical process, most of the carbon is allocated to the two carbon pools of “immediately mineralizable carbon†and “stable carbon†in a short period of time. The former leads to a significant increase in carbon dioxide emissions in the short term, while the latter seems to put a large amount of carbon in the carbon. The sustained release capsules are no longer dispersedly exposed to air and microorganisms, significantly slowing the turnover of carbon and its coupled nutrients. "Organic carbon can easily turn into carbon dioxide if it is fully exposed to air and microorganisms," Zhang Weixin said. What is important is that we cannot think that 蚯蚓 is not conducive to carbon sequestration based on the increase of “immediately mineralizable carbonâ€, nor can we believe that 蚯蚓 promotes carbon sequestration only by the increase of “stable carbonâ€. To this end, Zhang Weixin et al. proposed the concept of “carbon sequestration coefficient†to quantify the impact of niobium on carbon mineralization and carbon stability.
Research is often the case, sometimes it takes some common sense or intuition to support your judgment and prove it. But be wary of whether this common sense or intuition is deceptive. In conversations with reporters, Zhang Weixin showed the objective attitude that must be possessed in scientific research.
In this way, 蚯蚓 a large amount of soil (including various soil organisms) is taken every day, and the soil organic matter eaten is combined with cockroaches and intestinal microbes, and a part of carbon and nutrients can be more conveniently absorbed and utilized by plants. The other part of the carbon and nutrients will be more closely integrated with the soil particles, and when excreted, it becomes a soil with high fertility and long-lasting. After the “plowing†of the soil, it is not only conducive to plant growth, but also can deposit more carbon in the soil. In fact, “carbon mineralization†and “carbon stabilization†are also two aspects of the same process, which occur simultaneously and are difficult to separate; the existence of plutonium accelerates the process of “carbon mineralization†and “carbon stabilizationâ€, but The benefits are especially good. This protective effect of carbon on the one hand is beneficial to enhance the carbon sinking capacity of the soil, and may also be more conducive to the continuous promotion of plant growth.
"When the 'cake' is made bigger, the previous study only noticed that the rate of carbon dioxide release per unit time is faster, and it is considered that the total release is increased, but the whole incident itself is ignored." Zhang Weixin said.
Actually a little afraid of animals
At present, the South China Botanical Garden Restoration Ecology Research Group is moving the results of this laboratory to the wild environment for duplication.
“Some of the original ideas have been overthrown, and some interesting results are emerging.†Zhang Weixin has deployed field experiments at the National Field Science Research and Research Station of the Heshan Forest Ecosystem (Ecosystem) in Guangdong.
Because there are more than 3,000 species recorded in the world, their carbon sequestration capacity is also different. There are many factors affecting the carbon sequestration process. To accurately estimate the net effect of carbon on the global terrestrial ecosystem (ecosystem), more work needs to be done. .
It seems that Zhang Weixin will have a close relationship with him. However, he also admitted that he did not like animals, but this non-toxic annelid without bones and hands and feet is not bad.
Zhang Weixin found that one of the most common mites in the south of China, the genus Quercus, has a very strong carbon-holding capacity and can be described as the gospel of China's agricultural and forestry ecosystem (ecosystem). Although it is not a particularly cute animal, it does not hinder his research. He hopes to promote its positive role in promoting plant growth and soil carbon sequestration.
“It’s a psychological effect, just like many people don’t like spiders or compound eyes.†Research and preferences are two different things, and he only uses 蚯蚓 as a carrier for ecological research. “The theoretical frameworks and formulas we have established are not only suitable for research, but also for other soil animals.â€
Induction Cooktop,Electric Induction Cooktop,Countertop Induction Cooktop,Induction Base Cooker
Guangdong Puda Electrical Appliance Co., Ltd. , https://www.elecapoka.com