Extended Data Fig. 7: Comparisons of livelihood benefits between perennial rice (PR) and annual rice (AR) cropping systems over five years with ten seasons.
From: Sustained productivity and agronomic potential of perennial rice
The experiment was conducted at three field trial locations in Yunnan, China: Mengzhe (MZ; 21°57′ N, 100°14′ E, 1,255 m), Xinping (XP; 24°02′ N, 101°34′ E, 760 m) and Menglian (ML; 22°33′ N, 99°59′ E, 980 m). a-c, Labour cost ($). d-f, Non-labour cost ($). g, Labour number input (d). h, Output (gross income $). i, Net economic gain ($). For annual rice, seed, ploughing, seedling nurseries, transplanting, crop management and harvest are needed in every season. For perennial rice, these are all needed in the first season; however, in the subsequent seasons tillers of the plant are accomplished by regrowth, and thus seed, seedling nurseries, ploughing and transplanting are not needed, resulting in considerable savings of money and labour. 1 US$ = 6.4 Chinese Yuan, as of 4 November 2021. The data are means from Experiment 3, with the l.s.d. for labour cost being 101; non-labour cost, 102; labour number, 7; output, 886; and net economic gain, 838 (N = 54; P < 0.05) (see Supplementary Table 8).
