摘要
进行了甜高粱专用肥配方筛选及经济效益最佳施用量研究。结果表明:甜高粱专用肥原料间的效应是:尿素>磷酸二铵>硫酸锌>钼酸铵,甜高粱专用肥配方比例为:钼酸铵0.0259∶磷酸二铵0.3506∶尿素0.5844∶硫酸锌0.0391。随着甜高粱专用肥施用量梯度的增加,甜高粱株高、茎粗、地上部干重、穗粒数、穗粒重、千粒重和产量在增加。随着甜高粱专用肥施用量梯度的增加,甜高粱边际利润在递增,当甜高粱专用肥施用量超过1.50t/hm^2时,边际利润出现负值。甜高粱专用肥施用量(x)与甜高粱产量(y)的回归方程为:y=1.46+1.8413x-0.5691x2,甜高粱专用肥经济效益最佳施用量为1.49t/hm^2,甜高粱理论产量为2.94t/hm^2。
The specific fertilizer formula selection of sweet sorghum and optimum application rate for economic benefits were studied.The results showed that the effect of fertilizer in specific fertilizer of sweet sorghum was：urea〉 DAP〉 zinc sulfate〉 ammonium molybdate, and the ratio was：ammonium molybdate 0.0259：DAP 0.3506：urea 0.3506：zinc sulfate 0.0391.With the increasing application of specific fertilizer, plant height, stem diameter,dry weight above ground, grain number per spike, grain weight per spike, and the yield of sweet sorghum increased.The marginal profit was negative value when the amount of fertilizer application was more than 1.50 t/ha.The regression equation of specific fertilizer application amount（x） and yield of sweet sorghum（y） was：y =1.46 ＋ 1.8413 x-0.5691 x^2.The theoretical yield of sweet sorghum was 2.94 t/ha while application amount for optimum economic benefits of sweet sorghum was 1.49 t/ha.
出处
《中国糖料》
2017年第2期28-30,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
专用肥
最佳经济效益施用量
sweet sorghum
specific fertilizer
application amount for economic benefit
