Abstract:
Scientifically and rationally delimiting the permanent basic farmland in the whole county region is an important strategic measure for China to ensure the national food security capacity, guarantee farmers' real benefits and implement the food crop production strategy based on farmland management and technological application. The contradiction among urban master planning, land use planning, ecological protection planning of water sources and wild life conservation areas greatly affect the stability and longevity of permanent basic farmland such as term mismatch, the different technical standards, the land type border clash and the confused management regulations of the current planning. It is difficult for the policy makers, planner and farmers to plan, manage and build the protection zone of permanent basic farmland in practice. So, this study put forward a method for the delimitation of permanent basic farmland in the whole region based on multi-planning integration. First, on the basis of verifying the state of land use and coordinating the conflict of various planning, the farmland around the towns and cities with higher utilization index than the regional average is prior defined as the permanent basic farmland. Then, a comprehensive evaluation index system is constructed from the aspects of the quality of the cultivated land, the conditions of traffic location, the conditions of agricultural production and the space form of the land. This system is applied to delimit the protection area of the permanent basic farmland in other cultivated land zone by using the comprehensive score optimization method. The results show that: 1) stability and rationality of the delimiting basic farmland is further improved by deducting the reserved development land for construction projects, the cultivated land that is not consistent with the criteria for the delimitation of basic farmland and land parcels with the rules of utilization control unsuitable for farming. 2) Delimiting the permanent basic farmland around the town and other cultivated areas step by step, which is beneficial to the rational control of town's spatial scale, shape and landscape, also to construct the green ecological space in cities and towns.3) Lingshui county has delimited 22 224.36 hm2 of the permanent basic farmland in the whole region, which mainly located on Benhao - Timeng - Guangpo region, Longguang - Yingzhou region, Wenluo - Sancai region and the Nanfan breeding bases. The plan scheme has carried out the delimitation principles that the spatial pattern of permanent basic farmland should keep overall stability and can fine improve local parcels, prior it to protect the high quality cropland, and the quantity and quality of permanent basic farmland should be equally important. The constraint index of the plan meet the related policy requirements, and the quality control index of the plan is better than the index before adjustment. The delimitation scheme of the permanent basic farmland is basically reasonable. The method proposed in this research can not only implement the national territory utilization control regulation by means of the multi planning integration, but also provide a new reference for improving and deeply developing the prime farmland delimitation in the future.