Rice Genomics and Genetics 2025, Vol.16, No.4, 180-198 http://cropscipublisher.com/index.php/rgg 195 Figure 4 The basic flow chart of genome editing scheme for rice NUE improvement (Adopted from Fiaz et al., 2021) 7 Concluding Remarks The successful experience of the demonstration of new rice varieties in Dahao Village, Jiashan, shows that the promotion and application of excellent varieties is an important means to promote the green and efficient transformation of regional agriculture. First, the new varieties have greatly increased the yield per unit area, achieved the goal of increasing grain production on limited arable land, and provided a guarantee for food security. The yield of many new varieties in this demonstration exceeded 600 kilograms per mu, which strongly supported the increase in grain yield per unit area in Jiashan County. According to statistics, in recent years, with the application of a batch of high-yield new varieties, the rice yield per unit area in Zhejiang Province has steadily increased, with an increase of more than ten kilograms per mu compared with five years ago. Secondly, new varieties generally have better stress resistance and adaptability, reducing the excessive dependence of production on pesticides and fertilizers. For example, the promotion of varieties resistant to rice blast and lodging has reduced the application of pesticides and crop losses. The high-temperature resistant hybrid rice Yongyou 33 still maintains stable yields under extreme weather conditions, which is of practical significance for ensuring grain production in the context of future climate change. Thirdly, the combination of new varieties and green cultivation technology has promoted the reduction and efficiency of agricultural inputs. For example, the Jiashan base has reduced the use of nitrogen fertilizer by 15%-20% by promoting new varieties of controlled-release fertilizers, while significantly improving the utilization rate of nitrogen fertilizer; implementing green pest control, the field pest loss rate of new varieties has been significantly reduced, the pesticide residues in rice are lower, and the quality is safer. It can be seen that good varieties largely determine the implementation effect of good laws, and the two complement each other and jointly lead the green transformation of agriculture. At present, the area of self-bred varieties of crops in my country has exceeded 95%, and the contribution rate of good varieties in agricultural production has continued to increase. The promotion of new rice varieties not only increases farmers' production and income, but also reduces environmental costs, reflecting the connotation of green production. This is also in line with the country's strategic requirements of "storing grain in technology" and the concept of green development. The case of Dahao Village in Jiashan proves that as long as the scientific research results are
RkJQdWJsaXNoZXIy MjQ4ODYzNA==