摘要
在盆栽条件下,利用15N示踪技术研究了腐植酸尿素对生姜氮素吸收、同化和产量品质的影响。试验以莱芜大姜为材料,设5个处理:空白对照、等量腐植酸对照、尿素、腐植酸+尿素、腐植酸尿素。结果表明,施用腐植酸尿素显著增加了生姜植株各器官干重,提高了产量。施用腐植酸尿素增加了根系生物量,增强了根系活力,提高了根系对营养元素的吸收能力。15N示踪试验表明,施用腐植酸尿素后,氮肥利用率显著提高,与等氮量尿素相比,基施提高54.08%,追施提高24.50%,同时促进了生姜植株对土壤氮的吸收。施用腐植酸尿素增强了根系硝酸还原酶活性,提高了收获期植株各器官中氮素含量和氮素积累量,增大了氮素在根茎中的分配比例。施用腐植酸尿素根茎蛋白质含量和蛋白质产量显著提高,姜辣素含量增加,硝酸盐含量降低,品质得到了改善。
Nitrogen application is one of the most important measures to increase yield and improve quality in ginger production. However, misuse of N fertilizer not only decreased N use efficiency but also caused environment pollution. Many studies found that humic acid could accelerate growth of crop root and increase fertilizer use efficiency. But there were few researches about the relationship between the effects of humic acid on crop and fertilizer utilization rate. So this study was conducted to determine the effects of humic acid fertilizer on N absorption, assimilation of ginger and N use efficiency, to provide theory basis for the research and application of humic acid fertilizer. A pot culture experiment was carried out on the agricultural experiment station of Shandong Agriculture University to study the effects of humic acid urea on yield and N absorption, assimilation and quality of ginger using ^15N tracer technique. Five treatments （T1, T2, T3, T4, T5） were set up and each treatment had 30 pots. Six pots of each treatment （T3, T4, T5） were used for ^15N tracer experiment. The results showed that humic acid urea application increased fresh weight and vigor of ginger root. ^15N tracer experiment showed that humic acid urea application increased N use efficiency significantly. Meanwhile, it increased N uptake from soil. Humic acid urea application increased NR activity, which increased N content and accumulation in gin- ger plant and increased the proportion of N allocation to rhizome. Humic acid urea application increased protein content and protein production of ginger rhizome significantly. In addition, humic acid urea application improved ginger quality through increasing gingerols and decreasing NO3^- content.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2007年第5期903-909,共7页
Journal of Plant Nutrition and Fertilizers
基金
国家"863"计划项目(2003AA217022)资助
关键词
生姜
氮素
根系
氮肥利用率
ginger
nitrogen
root
nitrogen utilization rate
作者简介
梁太波（1981～），男，山东潍坊人，博士研究生，主要从事作物生理生态研究。E-mail：taibo@163．com通讯作者 E-mail：scyu@sdau．edu．cn
