摘要
为了解决盐渍土甜菜超量施肥导致的施肥成本高,化肥利用率低的疑难问题,选择甘肃省张掖市甘州区盐渍土,采用田间试验方法,进行了河西内陆灌区盐渍土甜菜氮磷钾肥最大利润施用量研究。结果表明:尿素、磷酸二铵和硫酸钾施用量与甜菜产量间的肥料效应回归方程分别为:y=69.75+62.56x-66.1054x^2、y=71+39.6856x-20.1836x^2和y=74.26+33.9138x-12.8569x^2,尿素、磷酸二铵和硫酸钾最大利润施用量分别为0.43t/hm^2、0.70t/hm^2和0.93t/hm^2,甜菜理论产量分别为84.43t/hm^2、88.89t/hm^2和94.68t/hm^2,统计分析结果与田间试验基本吻合。
In order to solve the problems that excessive chemical fertilizer application leaded to high cost and low utilization rate of fertilization in saline soil of planting sugarbeet, the test of NPK fertilizer application amount for maximum profit rate of sugarbeet was conducted in irrigation area of Hexi inland saline soil. The results showed that the regression equation of applying amount （x） of fertilizer （urea , diammonium phosphate and potassium sulfate） and the sugar beet root yield （y） was： y=69.75＋62.56x-66.1054x2, y=71＋39.6856x-20.1836x2, and y=74.26＋33.9138x-12.8569x2, respectively; the application amount of urea, diammonium phosphate and potassium sulfate for maximum profit rate of sugarbeet was 0.43 t/ha, 0.70 t/ha and 0.93 t/ha, respectively, theoretical root yield of sugarbeet was 84.43 t/ha, 88.89 t/ha and 94.68 t/ha, respectively, which was identical with that of field experiment.
出处
《中国糖料》
2017年第4期14-17,共4页
Sugar Crops of China
关键词
甜菜
盐渍土
氮磷钾肥
最大利润施肥量
sugarbeet
saline soil
NPK fertilizer
application amount for maximum profit rate
