摘要： 为进一步提高饲料玉米的栽培水平及肥料利用率, 以东陵白为试验材料, 采用田间试验、室内化学分析和生物统计相结合的方法, 研究了氮、磷、钾、锌肥对饲料玉米N、P、K养分吸收及产量形成的影响。主要结果是： (1)分析说明了饲料玉米在生育进程中全株N、P、K的浓度、吸收累积量、吸收速率等变化规律及与施肥的关系, 提供了每1000kg干草需要吸收N、P、K、Fe、Mn、Cu、Zn的数量；(2)应用一元三次方程模拟了不同施肥条件下干物质和N、P、K养分吸收量与出苗后天数之间的回归关系, 明确了干物质和N、P、K养分吸收的最快速率及出现时间；(3)氮、磷、钾化肥可显著提高饲料玉米鲜草产量, 氮肥增产50.2%, 磷肥增产36.4%, 钾肥增产13.2%。

关键词: 饲料玉米, 平衡施肥, 产量, 吸肥规律

Abstract: With Dong Ling Bai , through the methods of field experiment、chemical analysis and biological statistics, the effects of applying N、P、K、Zn fertilizer on forming law of yield and the absorption of N、P、K and nutrient quality were researched.The resualts were as foilwings: (l)The relations of the concentration and the amount of absorption and accumulation of N、P、K and applying fertilizer were analyzed, the ralations of the changing regulation of absorption rate and applying fertilizer were analyzed.The absorption requirements of N、P、K、Fe、Mn、Cu、Zn of 1000kg/day were offered.(2)With the condition of different fertilizer, the relations of the dry matter content and the amount of nutrient absorption of N、P、K and days were analyzed by the equation: Y= a+bx+cx²+dx³.The fastest rate and appearance time of absorption of N、P、K and accumulation of dry matter were discovered.(3)N、P、K fertilizer increased the fresh grass yield significantly, 50.2% by N fertilizer, 36.4% by P fertilizer, 13.2% by K fertilizer.

Key words: Silage Maize, Banlance Fertilizer, Yield, Nutrition absorption law

中图分类号: 

• S513.062