摘要
Abstract
This paper analyzed the basic conditions for rice cultivation in the Rudong area of Nantong City,Jiangsu Province,and systematically summarized the key technologies for local rice cultivation.The region is rich in light and heat resources and has the potential for increasing rice production,but typhoons,high temperatures and soil salinization have certain impacts on rice production.Based on this,the paper integrated core technologies such as variety breeding,precise water and fertilizer management,and green prevention and control,and established rice planting technologies suitable for regional ecological conditions.Specifically,it includes screening salt-tolerant genotypes with stable resistance varieties,such as Nanjing 5055,etc.;adopting dry seedling raising technology,constructing a dry seedling bed with coordinated regulation of physical structure and chemical environment,and conducting stress adaptation training when the second and a half leaf of the seedling unfolds and 5 days before transplanting to cultivate resistant and vigorous seedlings;constructing a precise controlled-release system of compound fertilizer nutrients in time and space(the peak period of nitrogen release is in line with the tillering peak period,and the phosphorus activity is maintained until the young panicle differentiation period),with the application rates of nitrogen,phosphorus and potassium fertilizers being 165,75 and 105 kg/hm2 respectively;establishing a dual-track water regulation mechanism of"salt drainage and alkali suppression-physiological water demand",and implementing precise water regulation of"shallow water promoting tillering-inch water protecting the embryo-dry and wet preventing senescence";constructing a green control system,through the coordinated effect of physical(setting up sound and light combination traps,etc.)and biological(spraying 200 billion spores/g Bacillus subtilis wettable powder,etc.)control,maintaining the ratio of beneficial to harmful organisms in the paddy field ecosystem at 1:2.This paper provides a reference for green,stable and high yield rice production in coastal saline-alkali areas.关键词
水稻种植/盐碱地区/良种适配/绿色防控Key words
rice cultivation/salt-affected area/adaptation of superior varieties/green prevention and control分类
农业科技
