‘桂辐98-296’种茎补种‘桂糖42号’宿根蔗农艺性状与效益分析

Research and Benefit Analysis of Directly Replanting Seed Cane in GT42 Ratoon:An Example of Xiangzhou, Guangxi in 2017

研究‘桂辐98-296’(GF98-296)种茎直接补种‘桂糖42号’(GT42)宿根蔗对农艺性状的影响,探讨GF98-296解决甘蔗宿根缺株断垄问题,为推广应用提供科学依据。试验设计GF98-296种茎直接补种GT42宿根(A)、GT42种茎直接补种于GT42宿根(B)和自然状态GT42宿根(CK)3个处理,在GT42宿根苗期1~4张叶片时期实施补种,并调查各个处理的农艺性状及进行经济效益分析。结果表明:A处理产量达到77.93 t/hm2,分别比B处理和CK增产14.15、19.79 t/hm2,增幅分别达22.18%和34.03%,达到极显著差异水平,B处理的产量与CK之间差异不显著;直接补种处理均不影响GT42宿根的发株、成茎、产量和蔗糖分;A处理的GF98-296蔗茎蔗糖分略高于GT42宿根;通过GF98-296种茎直接补种GT42宿根,蔗农增收5506.6元/hm2,制糖企业可增加工业产值14813.2元/hm2。GF98-296适宜作为GT42宿根的种茎直接补种品种,应对这项新技术进行大面积示范和推广。

We studied the effects of directly replanting GF98-296 seed cane in GT42 ratoon on agronomic traits of sugarcane,aiming to solve the problem of plant missing in sugarcane ratoon by using GF98-296.Three treatments were designed,which were directly replanting seed cane of GF98-296 in GT42 ratoon(A),directly replanting seed cane of GT42 in GT42 ratoon(B)and natural ratoon of GT42(CK).Seed cane replanting was carried out in 1-4 leaf stage of GT42 ratoon,the agronomic traits of all treatments were investigated and the economic benefits were analyzed in harvest stage.The results showed that the yield of A treatment was 77.93t/hm2,increased by 22.18%and 34.03%respectively compared with 14.15 t/hm2 of B treatment and 19.79 t/hm2 of CK.The difference between the yield of B and CK was not significant.Directly replanting treatment did not affect the growth,effective stem,yield and sucrose content of GT42.The sucrose content of GF98-296 in A treatment was slightly higher than that of GT42.Directly replanting GF98-296 seed cane in GT42 ratoon could increase the income by 5506.6 yuan/hm2 for sugarcane farmers,increase industrial output by 14813.2 yuan/hm2 for sugar enterprise.GF98-296 is suitable for directly replanting in GT42 ratoon,and this new technology should be demonstrated and promoted.