广西兴宾蔗区不同下种量和施氮量对甘蔗新品种桂糖46号生长、产量和经济效益的影响

The Performance of Guitang46 with Different Seeding Rate and Nitrogen Application Level in Xingbin Sugarcane Area of Guangxi

为了解桂糖46号不同下种量和施氮量在兴宾蔗区种植表现,为桂糖46号高产高糖栽培提供参考,设置了5个下种量(75000、90000、105000、120000和135000芽/hm^(2))和4种施氮水平(75、150、300和600 kg/hm^(2)),分别进行桂糖46号新植蔗种植试验,以分析各处理农艺性状和经济效益表现。结果表明:在广西兴宾蔗区,按当地常规施肥水平,以120000芽/hm^(2)下种量处理蔗茎产量最高,75000芽/hm^(2)下种量处理产量最低,分别为109485 kg/hm^(2)和76020 kg/hm^(2);按当地常规下种量,以300 kg/hm^(2)施氮量处理蔗茎产量最高,以75 kg/hm^(2)施氮量处理的产量最低,分别为117255 kg/hm^(2)和93675 kg/hm^(2);下种量与施氮量分别与甘蔗产量呈极显著和显著正相关;105000芽/hm^(2)下种量处理和150 kg/hm^(2)施氮量处理经济效益较好,投入产出比分别为1:1.50和1:4.84。建议广西兴宾蔗区桂糖46号下种量为105000~120000芽/hm^(2),施氮量150~300 kg/hm^(2)(折尿素326.1~652.2 kg/hm^(2))。

In order to investigate the performance of Guitang46 with different seeding rate and nitrogen application level in Xingbin sugarcane area,to provide reference for high-yield and high-sugar cultivation of Guitang46,five seeding rates(75000,90000,105000,120000 and 135000 buds/hm^(2))and four nitrogen application levels(75,150,300 and 600 kg/hm^(2))were set up for the new planting experiment of Guitang46,to analyze the agronomic traits and economic benefits of each treatment.The results showed that in the Xingbin sugarcane area of Guangxi,according to the local conventional fertilization level,the highest and lowest of sugarcane stem yield are under the treatment of 120000 buds/hm^(2)and 75000 buds/hm^(2),which are 109485 kg/hm^(2)and 76020 kg/hm^(2),respectively.According to local conventional seeding rate,the highest and lowest of sugarcane stem yield are under nitrogen application level of 300 kg/hm^(2)and 75 kg/hm^(2),which are 117255 kg/hm^(2)and 93675 kg/hm^(2),respectively.The seeding rate and nitrogen application level are highly significant and positively correlated with sugarcane yield.The economic benefits are better under the treatment of 105000 buds/hm^(2)and 150 kg/hm^(2)nitrogen application level,the ratio of input-output is 1:1.50 and 1:4.84,respectively.It is suggested that Guitang46 should be planted with 105000~120000 buds/hm^(2),and fertilized with 150~300 kg/hm^(2)of nitrogen(urea 326.1~652.2 kg/hm^(2))in Xingbin sugarcane area of Guangxi.