Abstract:

In order to save cost and add benefit, the seed quantum and nitrogen levels of Guizhou sugar No. 4 were discussed. In 2007-2009, 5 treatments were set respectively according to seed quantum and nitrogen level: 6.0×104 bud/hm2, 7.5×104 bud/hm2, 9.0×104 bud/hm2,1.05×105 bud/hm2 and 1.2×105  bud/hm2 (CK); 0 kg/hm2, 150 kg/hm2 ,300 kg/hm2, 450 kg/hm2 and 600 kg/hm2 (CK). The results showed that the plant growth, sugar content and yield were similar among different seed quantum treatments. The production of 7.5×104 bud/hm2 treatment increased 5.7% compared with the CK, and its income increased 852 yuan/hm2; the yield increased with the increasing of urea dosage, the production 0 kg/hm2 and 150 kg/hm2 reduced 35.2% and 20.0%, respectively. The other treatments were similar compared with the CK, but owing to the 450 kg/hm2 treatments used 150.0 kg/hm2 less than the CK, it reduced the cost by 25.0%, and increased the revenue by 263 yuan/hm2. These results provided guiding effect for reasonable application of seed and urea, reducing production costs and improving plant efficiency.

Key words: sugarcane, Qiantang NO.4, seed quantum, nitrogen level, economic traits

摘要：

为达到节本增效目的,探讨了黔糖4号合理用种量和施氮水平。2007-2009年在坡地针对该品种用种量和尿素施用各设置5个处理:分别为6.0×104芽/hm2、7.5×104芽/hm2、9.0×104芽/hm2、1.05×105芽/hm2和1.2×105芽/hm2(CK);0 kg/hm2、150 kg/hm2、300 kg/hm2、450 kg/hm2、600 kg/hm2(CK)。结果表明:各用种间植株生育、糖分和产量相似,用种7.5×104芽/hm2比CK增产5.7%,增收852元/hm2；产量随尿素用量增大而增加,与对照相比,0 kg/hm2和150 kg/hm2处理减产35.2%和20.0%,其他处理产量表现相似,450 kg/hm2处理比CK减少尿素用量150.0 kg/hm2,降低氮肥成本25.0%,增收节支263元/hm2。该结果对黔糖4号生产上合理用种和尿素施用,降低生产成本,提高种植效益具有指导作用。

关键词: 甘蔗;黔糖4号;用种量;施氮水平;经济性状