(Original title: non-GMO "clean field technology" to let rice weeds not born)
"Science and Technology Daily" reported on December 8, "clean rice" is the Shenzhen Crop Molecular Design and Breeding Institute, the Chinese Academy of Sciences Deng Xingwang and the Central Organization Department, "Thousands of people," Dr. Tang Xiaoyan, led by innovation and research team in Guangdong Province After landing in Shenzhen, made the first original technical achievements. In response to the difficult problem of weed control in direct seeding cultivation in rice, they successfully developed non-GMO herbicide resistant materials for rice, wheat, corn, rapeseed and other crops through chemical mutagenesis and screening methods. The index has developed a special "clean field farming" model, to avoid the harm of weeds on rice, breaking the multinational technology monopoly in the field.
Data Figure: Dr. Tang Xiaoyan
In traditional agricultural production, 50% -70% of the cost of field crop production is concentrated in the early stage of arable land, seeding and weed control. In our country, with the transfer of rural laborers to cities and towns, the demand for chemical weed control is especially urgent. Before returning to China, Tang Xiaoyan has been engaged in plant functional gene research, agricultural biotechnology research and application in the United States. When she learned that the anti-herbicide rice successfully solved the most difficult weed control weeds and other weed weeds in the United States but has not been able to walk into the country for a long time, she secretly resolved to cultivate a country with complete independent knowledge of our country Herbicide-resistant rice, a property right, frees Chinese farmers from the heavy weed farming.
In 2010, Tang Xiaoyan gave up tenure as a professor at a U.S. university and returned to China. In June of the same year, she and her team sowed more than 100 kilograms of mutagenized rice seeds in 60 acres of experimental fields in Shenzhen and eventually harvested 12 tons of seeds. "At that time, full houses were full of seeds," she told reporters with a smile. From them, they picked 2 tons of seed back into the fields and sprayed the herbicide at the 3rd leaf stage of the seedlings, eventually leaving only one "single seedling." After testing, this strain "single seedling" herbicide tolerance than the United States higher than similar rice.
The difference is that with genetically modified herbicide-tolerant crops, this technology to fill gaps in China's application of herbicide-resistant crops, Tang Xiaoyan team used the traditional mutagenesis breeding methods, screening mutants from mutagenic herbicide-resistant characteristics Rice, culminating in offspring that are herbicide-resistant, non-GMO.
"Combining herbicide-resistant rice with herbicides can effectively solve the problem of direct weed cultivation (sowing seeds directly into the fields) to produce weeds." She explained that planting herbicide-resistant rice seeds into the fields required young seedlings Weeding, simply to the ground with a herbicide to remove weeds, the ground a clean, and rice seedlings will not be harmed, so called "clean field technology."
On this basis, aiming at the high crop multiplication index in our country, peasants continue to plant the seeds and the rotation is common. The team also successively developed other crops that are resistant to herbicides such as corn, wheat and rape and put forward the "clean-field farming mode" to effectively solve the problem of peasants Crop demand, these herbicide-resistant crops can adopt direct seeding cultivation methods, alternating cross-planting, to achieve a simple and light management, benefits diminishing purposes.
At present, Jie Tin model has been in Sichuan, Guangdong, Anhui and other places, more experimental demonstration and success. Safe, simple and efficient weed control technology has greatly reduced the labor intensity of peasants and increased peasants' income. Roughly estimated that only rice per mu can be an integrated income of 120-300 yuan per 1000 acres of herbicide-resistant rice direct-seeded to create more than 1.2 billion planted proceeds. The team has cooperated with more than 30 research institutes and seed companies in China to breed a large number of varieties such as rice, corn, wheat and rape and provide "menu-style" variety selection and technical services for farmers.
In order to promote the demonstration and marketization of Jietian mode, recently, the team jointly established a clean field model industry consortium jointly with several agricultural research institutes, seed industry leading companies and agrochemical enterprises to further accelerate the promotion and application of clean field mode , Accelerating the process of agricultural modernization in our country and providing strong technical support for the reform on the supply side of agriculture in our country.