Dr. Mazhar H. Naqvi, an internationally renowned saline-alkali land expert, and his team recently made a special trip to conduct a scientific inspection of Ningbo Taiji Environmental Protection Equipment Co., Ltd.'s method of using "DS-sulfur dioxide flue gas treatment technology" to control saline-alkali land. Experts believe that : "The 'DS-Sulfur Dioxide Flue Gas Treatment Technology' method of treating saline-alkali land is a good method of transforming saline-alkali land that is not found in other countries in the world and is worthy of promotion." According to the Agricultural Resources and Agricultural Zoning Research of the Chinese Academy of Agricultural Sciences who accompanied the inspection Researcher Yang Juncheng of the institute introduced that Dr. Mazhar H. Naqvi is the director of the Institute of Nuclear Agricultural Sciences of the Pakistan Atomic Energy Commission and an internationally renowned expert on saline soil agriculture. He has long been engaged in research on bioremediation and management of saline-alkali soils. This time, we were invited by the Chinese Academy of Agricultural Sciences to conduct a scientific inspection of my country's saline-alkali land transformation work. "DS-Sulfur Dioxide Flue Gas Treatment Technology" is a circular economy technology that can not only use industrial slag as an adsorbent for efficient desulfurization, but also use the desulfurization product as a soil conditioner to improve cultivated land, transform saline-alkali land, and wasteland. This technology Developed by Beijing Hanxiang Environmental Biological Sciences Research Institute and Ningbo Taiji Environmental Protection Equipment Co., Ltd., it took 8 years and cost more than 50 million yuan. It contains five invention patents and two utility model patents, and was approved by the former State Economic and Trade Commission, It was appraised by experts from the China Nonferrous Metals Industry Association and the China Electricity Council; it was recognized by the State Environmental Protection Administration as a national key practical technology for environmental protection and won the first prize of China Nonferrous Science and Technology Award. Inventor Shi Hanxiang was named "China's Top Ten Science and Technology News Figures in 2004" for his successful development of core technologies to solve "three-dimensional pollution" and restore soil ecology. According to Shi Hanxiang, one of the characteristics of this technology is that it surpasses the currently commonly used "limestone-gypsum desulfurization method" and uses a large amount of industrial waste as adsorbents. It can even use saline-alkali soil and red soil, and the desulfurization efficiency is very high. Another feature of this technology is that slag adsorbed with sulfur dioxide can be used as "primary fertilizer" to improve soil quality. It can also be simply processed into sulfur-rich fertilizer for improving saline-alkali land, sandy wasteland, etc. The experts inspected the 10-acre saline-alkali land experimental demonstration base in Jiangnan Village, Andong Town, Cixi City, and the 150-acre saline-alkali land transformation project of the Cixi Coastal Shelter Forest Project. In the experimental base where the flowers and trees are lush and the vegetables and fruits are exceptionally fresh, the researchers introduced the process of transforming the saline-alkali land to the experts. In the winter of 2000, scientific researchers took the lead in applying this technology. The fertilizer produced by the non-ferrous smelter was transported to the Jinqu Basin, where the soil available sulfur content is relatively low, and soil improvement tests were conducted in Lanxi and Songyang counties in the Songgu Plain. The test** * Set up 6 points, including 4 points in Lanxi and 2 points in Songyang. The varieties tested: Lanxi is rape "Zheyou No. 2" and Songyang is "92-58 series." This fertilizer is applied as basal fertilizer at one time, and the crops During harvest, various indicators such as economic and yield of rapeseed are examined and recorded. After the test, the Zhejiang Provincial Soil and Fertilizer Station issued two fertilizer efficiency certification reports on July 17 and October 18, 2001 respectively. The certification report stated that the application of this fertilizer has a significant effect on increasing the yield of rapeseed (the yield of rapeseed increased by 15.9%), and can be further tested, demonstrated, and promoted in similar areas; the fertilizer also has a positive impact on the physiological growth and straw yield of rapeseed, and can Increase the oil yield of rapeseed by 3%. After measuring the rapeseed treated with this fertilizer, Zhejiang University School of Medicine stated in the "Evaluation of Nutritional Function of Rapeseed Applying This Fertilizer" report on July 15, 2001 that this fertilizer can increase the content of various essential nutrients in rapeseed. It can improve its nutritional proportion and nutritional value. It is suitable for a variety of crops and deserves to be vigorously promoted to bring into play its social and economic benefits. In order to seek comparable technical parameters on land in different regions, in July 2002, researchers from Ningbo Taiji Environmental Protection Equipment Co., Ltd. improved 10 acres of saline-alkali land in Jiangnan Village and planted cypress balls, pittosporum, holly, and Shuhui. , hibiscus and more than a dozen varieties of flowers and trees. Vegetables and crops were planted on a hill of land according to the season to observe the soil improvement effect of planting different plants.
On June 1, 2003, the scientific research team took soil tests and found that the potassium content of the soil where vegetables were planted dropped by 0.04%, the sodium content dropped by 0.60%, and the alkaline pH value dropped by 0.64; the potassium content of the soil where flowers and trees were planted dropped by 0.15%. The sodium content dropped by 0.67%, and the alkaline PH value dropped by 0.72. The effect after the transformation of saline-alkali land is quite obvious. After the original rigid land was plowed and reacted with this fertilizer, the soil became loose and has good air permeability. It contains various trace elements that are beneficial to plant growth. The necessary conditions have been created for the release. In order to expand the application scope of technological achievements, in February 2005, the company undertook the renovation project of 150 acres of saline-alkali land in the "Cixi Coastal Shelter Forest Project". The reconstruction area is located on the south side of Shitang River in Cixi City. Before the reconstruction, the area was covered with reeds, the weather was sunny and full of salt flowers, and the soil pH value was between 9.1-9.4. After the renovation, more than a dozen varieties of green seedlings, including weeping willow, hibiscus, ailanthus, Sophora japonica, Luanka tree, Camptotheca acuta, and oleander, were planted. After a dry season with little rain and several typhoons (special topic, photo gallery), the current survival rate remains at More than 95%. In addition, watermelon, edamame, peas, radish, cabbage, garlic and other crops grown in the middle of the green belt are growing well, and some have already produced good harvests. The experts then visited the desulfurization equipment production workshop of Taiji Environmental Protection Equipment Co., Ltd. Facing the desulfurization equipment, Dr. Mazhar H. Naqvi said to Shi Hanxiang: "The 'DS-sulfur dioxide flue gas treatment technology' you successfully developed can utilize industrial Waste residue treatment is a very good method and is worthy of promotion. " Researcher Yang Juncheng, who specializes in saline-alkali land transformation research in China, believes that using industrial waste residue as an adsorbent to control sulfur dioxide in industrial flue gas will also absorb the sulfur dioxide. The method of making fertilizer through simple processing and using it to control saline-alkali land is a rare and mature circular economy technology. As a new type of fertilizer, this fertilizer has a wide range of functions and is suitable for a variety of crops and deserves to be vigorously promoted. "Sulfur-rich biofertilizer" has an obvious effect as a saline-alkali land improvement agent. It will play a very important role in promoting the development and utilization of millions of hectares of saline-alkali land in my country and alleviating the contradiction between more people and less land in our country.