Abstract:

To solve the slow breeding of new peanut cultivars and short supply period of fresh peanut in Sichuan, we studied the feasibility of double cropping. Three colored peanut cultivars ‘Shuhua 1 (SH1)’, ‘Shucaihua 1(SCH1)’, ‘Shucaihua 2(SCH2)’ were used as materials to study the growth, development, yield-related characters and propagation coefficient of cultivars sown in different months in Renhe experimental base of western Panzhihua, Sichuan. The results showed that the cultivars achieved their maximum yield with different planting periods, but the difference of the planting periods was not significant. The planting period had a significant impact on growth and yield traits of all cultivars. There was a first increase then decrease tendency of emergence rate, mature strain height, single plant pod number and the propagation coefficient of cultivars sown from January to September, while the growth period had an opposite tendency. Due to the low temperature, no pod was produced by all the three cultivars sown from October to November. Further analysis showed that the single-season breeding coefficient of ‘SCH1’ sown in May was the highest. The weighted average calculation results showed that the annual reproduction coefficient of ‘SH1’ and ‘SCH2’ sown in March was the highest and that of ‘SCH1’ sowed in January was the highest, which were the best for double cropping. In conclusion, double cropping is feasible in western Panzhihua of Sichuan, especially for cultivars with short-growth period, and double cropping system can extend the supply period of fresh peanut, and provide the possibility for rapid propagation of new local peanut cultivars.

Key words: Sichuan, double cropping system, colored peanut, sowing date, breeding coefficient