Abstract:Heritage conservation is an important recurring research theme on agricultural heritage systems. Improving the income of farmers from agriculture is regarded as an effective conservation approach. This study examined how the improved rice-fish-duck coculture (IRFDC) promotes the protection of the Honghe Hani Rice Terraced System (HHRTS) by keeping farmers farming in their hometowns. A semi-structural interview and a questionnaire survey were used to collect data on agricultural input-outputs and household employment in HHRTS. As a result, a fairly large proportion of HHRTS rice terraces were used for the hybrid rice monoculture (HRM) with chemical inputs, and most of these rice terraces were wasted for half a year on account of being left unused; the IRFDC requires considerable time input for farming and breeding, but barely needs any chemical inputs. IRFDC entails a higher cost than HRM, but also has a higher return than HRM. Driving a family to do full-time farming requires extra more than 0.71 ha rice terraces for IRFDC. In conclusion, Globally Important Agricultural Heritage Systems (GIAHSs) can be used for protecting terraces from abandonment and destruction by improving agricultural economic benefits for farmers. At present, a shortage of laborers in HHRTS sites is false. Agricultural heritage sites do not actual need so many people if peasant households can do large-scale farming.

The livelihood of peasant households is one of the selection criteria of Globally Important Agricultural Heritage Systems and a critical factor that affects agricultural heritage system conservation and inheritance. Taking the Honghe Hani Rice Terraces System (HHRTS) and Shexian Dryland Terraces System (SDTS) as examples, we investigated 304 households through a participatory rural appraisal method to discuss the livelihood assets and strategies of households in agricultural heritage systems. From the viewpoint of livelihood strategies, household strategies can be divided into pure agricultural, nonagricultural, and part-time agricultural strategies. The livelihood strategies of households in the HHRTS feature a higher proportion of nonagricultural, while those in the SDTS have a diverse distribution. With respect to livelihood assets, we constructed a livelihood assets accounting framework to highlight the important role of traditional culture and information technology in agricultural activities. The average livelihood assets value in the HHRTS and SDTS was 2.249 and 1.832, respectively. Then, applying the multinomial logit model, we quantitatively analyzed the relationship between livelihood assets and strategies. The results show that in both terrace systems, the understanding of traditional agricultural knowledge is important to suppress the shift of pure agricultural households to nonagricultural or part-time agricultural households. Therefore, in order to achieve dynamic conservation of terrace systems, it is necessary to effectively increase the cultural assets level of households, especially farmers' understanding of traditional agricultural knowledge.