Recognition And Driving Mechanism Of Non-grain Cultivated Land In Hilly And Mountainous Areas

China has had a significant problem with the conservation and use of its cultivated land resources for a very long time.The fact that China has a large population,limited cultivated land,few cultivated land resources per person,and insufficient arable land reserves is a fundamental aspect of its national character.China’s ability to produce food is significantly impacted by the critical issue of non-grain cultivated land.In addition,The land use patterns of those in charge of agricultural output have altered as urbanization has accelerated.Agricultural production operators gradually give up the conventional method of growing grain and switch to cash crops with higher returns,especially in the unique environment of hilly and mountainous areas due to the fragmentation of its cultivated land,the limitations of its topography and landscape,the constraints of arable land utilization conditions,and utilization methods,on the one hand.This is influenced by comparative interests.On the other hand,the phenomena of “the grass is taller than grain” and year-round and seasonal desertion of varying degrees is becoming increasingly problematic owing to the current problem of aging and the gradual accentuation of agricultural labor migration.Therefore,several empirical investigations are required to explore the issue of non-grain cultivated land,and further scientific research is required to pinpoint the traits and mechanisms underlying non-grain cultivated land in hilly mountainous regions.Under the heading of “concept definition-feature recognition-driving mechanism”,S County in Jiangxi Province was chosen as the research area at first.Second,data extraction guidelines for non-grain cultivated land are defined in accordance with the national standards for non-grain cultivated land regulation.Third,using data from field visits and multi-temporal Sentinel-1A radar photos,crop extraction methods were developed.Later,in order to examine the spatial pattern features of the phenomena of non-grain cultivated land,data on non-grain cultivated land in the research region was collected using ENVI and Arc GIS software.Finally,the index system of influencing mechanism was improved,and we use the geographical detector to clarify the causes of non-grain cultivated land.The results are following:(1)Sentinel-1A radar images have the benefits of a steady satellite visit time and low cloud effect.The non-grain feature detection technology in hilly and mountainous locations has strong practical guidance when combined with the rice crop growth law and field research.(2)The phenomena of non-grain cultivated land in hilly and mountainous areas is prevalent.With the addition of permanent basic farmland,the rice planting area in S County in 2019 was 16,319.48 ha,and the rice planting area within the permanent basic farmland was13,244.82 ha,so the non-grain rate of cultivated land was 57.47%,which is greater than the level of non-grain cultivated land in plain regions in prior studies.(3)In S County,the amount of non-grain cultivated land rose from the southeast to the northwest,and was primarily distributed in the mountainous region of the "bowl" landscape.(4)The level of non-grain cultivated land in S County exhibits the distribution traits of industrial core towns,with the distribution density being higher in the west and lower in the east,and gradually sloping to the northeast.On the other hand,municipalities where cash crops predominate have much more non-grain farmed land than other places.(5)The slope,the distance from the road to the countryside,and the primary grain-producing areas are the main mechanism driving the non-grain cultivated land in the region,according to the results of the geographical detector mechanism.(6)According to the interaction detection results,the influence of any two mechanism was enhanced to varying degrees,and the enhancement relationship was nonlinear,and the distance from the road to the countryside and the main producing areas of grain function were the driving forces behind the "non-grain The study area’s transit location and policies had a big impact on how non-grain cultivated land was distributed.