摘要
为探索马铃薯氮素吸收积累特性与施用技术,在闽东南冬种马铃薯区设置不同施氮水平的田间试验。结果表明,马铃薯全株及块茎的N素积累呈Logistic曲线动态,茎叶干物质积累和叶面积发展动态呈单峰曲线,马铃薯产量、块茎干物质和淀粉积累量均与施N量呈抛物线型相关。在供试条件下,马铃薯目标产量38t.hm-2,平均每生产1 000kg鲜薯的吸N量为3.31kg,需施N5.91kg,达到最佳经济效益的经济施N量为239.5kg.hm-2。
Different nitrogen （N） application levels in the winter potato areas in the Southeast Fujian were conducted to explore the characteristics of N absorbtion and accumulation as well as application technology. The results showed that N accumulation in the whole plant and tuber of the potatoes both exhibited a Logistic dynamic curve. The dynamics of leaf area and dry matter accumulation in stems and leaves all showed a single peak curve. The yield, dry matter and starch accumulation of tuber in potatoes all had parabola correlation with N application. Under the tested conditions, the economic N application was determined to be 239.5 kg . hm-2 with an expected yield of 38 t .hm-2. On the average, N absorption and application were 3.31 kg and 5.91 kg for fresh potatoes per 1 0O0 kg, respectively.
出处
《福建农业学报》
CAS
2012年第7期679-684,共6页
Fujian Journal of Agricultural Sciences
基金
福建省科技计划重点项目(2005N032)
福建省财政专项--福建省农业科学院科技创新团队建设项目(STIF-Y04)
关键词
马铃薯
氮素
产量
叶面积
干物质
淀粉
Potato
nitrogen
yields leaf area
dry matter
starch
作者简介
林永忠（1966-），男，教授级高级农艺师，主要从事粮食作物栽培技术研究与推广（E—mail：1139892340@qq．com）
通讯作者：姜照伟（1973-），男，博士，副研究员，主要从事作物高产栽培与生理生态研究（E—mail：jiangzw1973@163．com）
