桂辐98-296补种延长宿根蔗年限模式农艺性状及经济效益分析OA

Guifu 98-296(GF296)seed canes were replanted back to supplement ratoon sugar-cane GT44 of the third year to see the possibility of extending ratoon life by 2 years,thus providing a basis for promoting the new technology for extending life of the ratoon sugarcane seed canes by di-rect replantation with seed cane.The plot of second-year ratoon sugarcane of GT44 after harvesting was selected as the test site.GF296 seed canes were used to directly replant the field lack of sugar-cane crops to investigate agronomic trait indexes and economic benefits of Mixed Group 1 for ex-tending 1 year of ratoon sugarcane life(the third year of GT44 ratoon sugarcane)by direct replanta-tion with seed canes[direct replantation of newly planted GF296 seed canes +GT44 ratoon with 1 year extended(Ratoon 1)]and Mixed Group 2 for extending 2 years of ratoon sugarcane life(the third year of GT44 ratoon sugarcane)by replantation with seed canes[ratoon sugarcane of the first year after direct replantation with GF296 seed canes +ratoon sugarcane GT44 with 2 years extended(Ratoon 1)],taking the groups without replantation of the same year as CK1 and CK2.The result showed that:1 year after replantation in Mixed Group 1,germination rate and stem formation rate of GF296 were 86.25%and 81.43%,indicating average level in production;the cane germination rate of GT44 Ratoon 1 was at the same level as that of CK1;the cane yield of Mixed Group 1 was 87.79 t/hm2,which was 22.52 t/hm2 higher than that of CK1(an increase of 34.50%),indicating a extremely significant difference;Mixed Group 1 increased the income by 7114.10 yuan/hm2,lifting the income of sugar producer by 15950.00 yuan/hm2.In Mixed Group 2,the cane germination rate of ratoon sug-arcane was 226.56%,while the cane germination rates of GT44 Ratoon 2 and CK2 were 68.91%and 65.51%,the two maintained at the same level;the cane yield of Mixed Group 2 was 91.85t/hm2,which was 50.29 t/hm2 higher than that of CK2,with an increase of 121.01%,also indicating an ex-tremely significant difference.Comparing the economic benefits of Mixed Group 2 and CK2,the net income increase of sugarcane farmers was 20116.00 yuan/hm2 and the profit increase of sugar pro-ducers was 39614.00 yuan/hm2.Directly replanting GT44 sugarcane with G98-296 seed cane is fea-sible in terms of agronomic traits,which can extend 2 years of ratoon life,so it is cost-effective from the perspective of economic income,therefore it is suitable for large-scale popularization.