Practical Needs:
Black swan events like the Russia-Ukraine conflict have exposed vulnerabilities in traditional grain supply chains. This study develops a distributed ledger-based farmland use-right transfer mechanism to establish a digital governance framework balancing market efficiency and food security.

System Architecture:
· Multi-chain structure: Mainchain for land ownership records, sidechains for crop rotation contracts
· Smart contract modules: Automated execution of fallow subsidies and cross-regional rotation policies
· Data oracles: Integration of satellite remote sensing and soil sensor data streams
· Privacy layer: Zero-knowledge proof protocols for protecting farmer-sensitive information

Institutional Innovation:
Proposing a "dynamic land credit" concept that quantifies soil improvement efforts as tradable digital assets. The research emphasizes balancing blockchain transparency requirements with cultural sensitivities in rural land management through differentiated regional node access rules.