摘要
采用正交试验,探索甘蔗新品种粤糖60号在广东湛江蔗区获得高产、稳产的最佳施肥量和适宜种植密度.结果表明,粤糖60号出苗率、分蘖率、成茎率、茎长对肥料施用量和种植密度反应不敏感;茎径和有效茎数对氮肥量、钾肥量和下种量反应敏感,对磷肥反应不敏感;随着施肥量和下种量的增大,蔗糖分会显著降低.各因素中均以水平2（氮肥0.825 t/hm^2、磷肥1.875 t/hm^2、钾肥0.675 t/hm^2和49 500段双芽苗/hm^2）时蔗茎产量最高,以氮肥0.600t/hm^2、磷肥1.125 t/hm^2、钾肥0.900 t/hm^2、下种49 500段双芽苗/hm^2水平组合时的含糖量最高.因此,氮肥0.825t/hm^2、磷肥1.125～1.875 t/hm^2、钾肥0.675～0.900 t/hm^2、下种量49 500段双芽苗/hm^2为粤糖60号在广东湛江蔗区最佳施肥量和适宜种植密度.
In order to explore the suitable planting density and application rates of NPK fertilizers for the new cane variety Yuetang No.60, a orthogonal trial was conducted in Zhanjiang cane area, Guangdong province. The results showed that germination rate, tillering rate, into stem rate and stalk length were not very sensitive to the application rates of nitrogenous fertilizer, phosphate fertilizer, potash fertilizer and planting densities while stalk diameter and number of millable stalks were very sensitive to the application rates of nitrogenous fertilizer, potash fertilizer and planting densities, not sensitive to the application rate of phosphate fertilize. Sucrose content would obvious low along with the increase of application rates of fertilizer and planting density. Sugar yield in Level 2 of every factor （0.825 t/hm^2 of urea, 1.875 t/hm^2 of calcium superphosphate, 0.675 t/hm^2 of potassium chloride and 49 500 two budded setts/hm^2） was the highest while sucrose yield was the highest in Level 2 （0.600 t/hm^2 of urea） of application rates of nitrogenous fertilizer, Level 1 （1.125 t/hm^2 of calcium superphosphate）, Level 3 （0.900 t/hm^2 of potassium chloride）, Level 2 （49 500 two budded setts/hm^2） of planting density. So, 0.825 t/hm^2 of urea, 1.125-1.875 t/hm^2 of calcium superphosphate, 0.675-0.900 t/hm^2 of potassium chloride and 49 500 two budded setts/hm^2 were the suitable planting density and fertilizer rates for Yuetang No.60.
出处
《广东农业科学》
CAS
CSCD
北大核心
2014年第20期19-23,共5页
Guangdong Agricultural Sciences
基金
国家现代农业产业技术体系建设专项(CARS-20-1-4)
广东省教育部产学研结合项目(2012A090300015)
广东省科技计划项目(0000)
关键词
施肥
密度
粤糖60号
正交试验
fertilizer
density
Yuetang No.60
orthogonal trial
