江西农业大学学报2025，Vol.47Issue(2)：277-290,14.DOI:10.3724/aauj.2025025
砂田退化机制及其修复改良措施:研究进展及展望
Degradation mechanisms of sand-mulched farmland and their restoration and improvement measures:research status and prospects
摘要
Abstract
This study aims to systematically identify the process of degradation and the underlying mechanism of gravel-sand mulched fields,as well as to discuss the rationality of the improvement measures for the key soil environmental problems of gravel-sand mulched field,thus providing theoretical support and scientific evidence for the development of gravel-sand mulched field ecosystems restoration and sustainable agricultural production.Based on the previous research,the context of soil environment degradation in gravel-sand mulched field was clarified from the time dimension,the physical and biochemical environment degradation mechanism in gravel-sand mulched field was revealed at the level of functional degradation of overburden layer and continuous cropping obstacles.The effectiveness and suitability of improvement measures such as field management measures,application of soil amendments,reform of farming methods and accelerated gravel pedogenesis were summarized.When the continuous cropping period of the sandy field reaches 10 years,obvious continuous cropping obstacles will emerge.After 3-5 years,the supply of water and fertilizer is insufficient,therefore it is necessary to supplement water and fertilizer to meet the needs of crop growth.After 20 years of continuous cropping,the function of soil moisture and heat preservation will be basically lost.Under the single cropping mode,the rhizosphere conditions and soil environment lead to the continuous deterioration of the microbial environment.The gravel-sand mulched field has changed from the bacterial type high fertility soil to the fungal type low fertility soil.The main coping strategies at this stage are to change the tillage methods and apply bio organic fertilizer.The relevant research on the degradation mechanism of sandy fields and their improvement measures is basically clear,but there are still some deficiencies.In the future,relevant research can be expanded and deepened in the following three aspects:(1)The current monitoring of gravel-sand mulched field soil environments is insufficiently continuous across different periods,and it is important to summarize the characteristics of soil environmental deterioration in gravel-sand mulched field in different periods in order to implement targeted improvement measures.(2)The mechanism by which physical and chemical soil characteristics correlate with biochemical environments is not yet fully understood,and there is a lack of integrated and quantitative analysis and description.(3)The management of abandoned gravel-sand mulched fields is a long-term process.It is important not to neglect the improvement of the soil environment through pedogenesis of rock fragments,as this is of great significance for delaying the desertification of sandy fields and promoting the colonization of plants.关键词
砂田退化历程/砂田退化机制/土壤环境/调控措施Key words
process of gravel-sand mulched field degradation/mechanism of gravel-sand mulched field degradation/soil environment/regulation measures分类
农业科学引用本文复制引用
李王成,黄亚浩,马东祥,贾振江,吴洋洋,徐昊文,张一帆,李旭..砂田退化机制及其修复改良措施:研究进展及展望[J].江西农业大学学报,2025,47(2):277-290,14.基金项目
国家自然科学基金项目(52169010)和宁夏自然科学基金重点项目(2021AAC02008)Project supported by the National Natural Science Foundation of China(52169010)and The Key Natural Science Projects of Ningxia(2021AAC02008) （52169010）
