摘要
【目的】为研究马铃薯氮利用效率,筛选氮高效利用品种,进一步研究氮营养高效利用机理提供依据。【方法】以24个品种为材料,设3个施氮水平,以MS营养液为基础营养液,通过营养液沙培试验,研究马铃薯氮高效利用品种的评价指标及评价方法。【结果】马铃薯苗期和块茎膨大期的含氮率、干物质积累量、氮积累量和收获时的产量存在较大的变异系数,可作为筛选的主要指标,而苗期的根冠比差异较明显,可作为筛选的辅助指标;以此为依据,在确定最适氮水平条件下,通过二次加权平均法及聚类分析法筛选出马铃薯氮高效利用品种费乌瑞它、川芋117,氮低效品种川芋56和凉薯97。【结论】马铃薯苗期和块茎膨大期的含氮率、干物质积累量、氮积累量和收获时的产量可作为氮高效利用的筛选指标,在确定最适氮水平条件下,二次加权平均法及聚类分析法筛选马铃薯氮高效利用品可靠性高。
【Objective】The study aimed to provide a basis for the study of potato nitrogen use efficiency,screen the nitrogen efficient utilization varieties and further study on the mechanism of high efficient utilization of nitrogen nutrition.【Method】The evaluation index and method of potato cultivars with high nitrogen utilization efficiency were studied by sand culture experiment of nutrient solution based on MS nutrient solution with 24 varieties as materials and 3 levels of nitrogen application.【Result】In potato seeding period and tuber expansion period,the nitrogen content,dry matter accumulation,nitrogen accumulation and yield had larger coefficient of variation,which can be used as main screening indicators.While the root-shoot ratio at seedling stage was significantly different,which could be used as an assistant index for screening.Therefore,under the condition of determining the optimum nitrogen level,the high nitrogen utilization efficiency potato cultivars Favorita,Chuanyu117 and nitrogen-inefficient cultivars Chuanyu56 and Liangshu97 were screened by means of twice weighted average method and cluster analysis.【Conclusion】Nitrogen content,dry matter accumulation,nitrogen accumulation and yield in potato seedling and tuber expansion stages can be used as screening indicators for nitrogen efficient utilization,and under the condition of determining the optimum nitrogen level,the twice weighted average method and cluster analysis method have high reliability in screening potato nitrogen-efficient products.
作者
程红
郑顺林
马海艳
张开勤
袁继超
CHENG Hong;ZHENG Shun-lin;MA Hai-yan;ZHANG Kai-qin;YUAN Ji-chao(College of Agronomy,Sichuan Agricultural University,Sichuan Wenjiang 611130,China;Minista of AgOculture,Key Laboratoc of Tuber Crop Genelcs and Breeding,Chengdu Jiusen Agricultural Technology Company,Sichuan Xindu 610500,China)
出处
《西南农业学报》
CSCD
北大核心
2019年第10期2292-2298,共7页
Southwest China Journal of Agricultural Sciences
基金
四川省育种攻关及配套项目(2016NYZ0051-5、2016 NYZ0032)
国家重点研发计划(2018YFD0200808)
国家现代农业产业技术体系四川薯类创新团队(川财教[2019]59号)
关键词
马铃薯
氮高效
品种筛选
氮素利用效率
Potato
High N use efficiency
Variety screening
Nitrogen utilization efficiency