摘要
为了解决甜高粱制种过程中存在的氮磷钾肥超量施用的问题,进行了制种甜高粱氮磷钾肥经济效益最佳施用量研究,结果表明:随着尿素、磷酸二铵和硫酸钾施用量梯度的增加,制种甜高粱穗粒数、穗粒重、百粒重和产量在增加,当三者施用量分别大于0.90t/hm^2、0.50t/hm^2和0.24t/hm^2时,边际利润出现负值。经回归统计分析尿素、磷酸二铵和硫酸钾最佳经济效益施用量为0.92t/hm^2、0.49t/hm^2和0.25t/hm^2,制种甜高粱理论产量分别为3.20t/hm^2、3.14t/hm^2和3.16t/hm^2。
To solve unreasonable application of NPK fertilizer,The optimum application rate of NPK fertilizer for best economic benefit in hybrid seeds production of sweet sorghum was studied.The results showed that, with increasing of urea and diammonium phosphate and potassium sulfate, the grain number, grain weight per spike,hundred-grain weight and yield of seed sweet sorghum increased; the marginal profits occurred negative value when the amount of three fertilizer was more than 0.90 t/ha, 0.50 t/ha and 0.24 t/ha, respectively.By the regression statistical analysis, the theoretic seed yield of sweet sorghum were 3.20 t/ha, 3.14 t/ha and 3.16 t/ha when application amount of urea and diammonium phosphate and potassium sulfate was 0.92 t/ha, 0.49 t/ha and0.25 t/ha, which resulted in optimum economic benefits in seeds production of sweet sorghum.
出处
《中国糖料》
2017年第2期31-33,共3页
Sugar Crops of China
基金
甘肃省科技重大专项项目:高粱高效制种及加工生产技术研究(2015GS05915)
关键词
甜高粱
氮磷钾肥
经济效益最佳施用量
sweet sorghum
NPK fertilizer
application rate for best economic benefits
