河南农业科学Issue(3)：52-55,4.DOI:10.15933/j.cnki.1004-3268.2015.03.013
氮肥施用量对甘薯生长、含氮量及产量的影响
Effects of Nitrogen Fertilizer Application Amount on Growth, Nitrogen Content and Yield of Sweetpotato
摘要
Abstract
In this paper, the dual-purpose sweetpotato variety Zhenghong 22 was used as the experimen-tal material to study the influence of different application amount of nitrogen fertilizer on growth, nitrogen content and yield of sweetpotato. The results showed that aboveground fresh weight increased with the in-crease of nitrogen application amount and the growth period. Underground fresh weight increased with growth period, while increased at first and then decreased with the increase of nitrogen application amount. The ratio of aboveground fresh weight and underground fresh weight decreased with the growth period,while increased at first and then decreased with the increase of nitrogen application amount. Both the nitrogen content of aboveground dry matter and underground dry matter decreased with the growth pe-riod,while increased at first and then decreased with the increase of nitrogen application amount. Overall, the ratio of the nitrogen content of aboveground dry matter and underground dry matter increased with the increase of nitrogen application amount and the growth period. The yield of fresh sweetpotato increased at first and then decreased with the increase of nitrogen application amount,and the treatment with nitrogen fertilizer of 75 kg/ha had the highest fresh sweetpotato yield of 43 819. 44 kg/ha. The results of correla-tion analysis indicated that the aboveground fresh weight had a significant positive correlation with the ni-trogen content of aboveground dry matter, and both the underground fresh weight and the nitrogen content of underground dry matter were significantly positively correlated with the fresh sweetpotato yield, the ra-tio of aboveground fresh weight and underground fresh weight were significantly negatively correlated with the nitrogen content of underground dry matter.关键词
甘薯/氮肥/含氮量/产量Key words
sweetpotato/nitrogen fertilizer/nitrogen content/yield分类
农业科技引用本文复制引用
杨育峰,张晓申,王慧瑜,段俊枝,李君霞,代小冬,杨国红..氮肥施用量对甘薯生长、含氮量及产量的影响[J].河南农业科学,2015,(3):52-55,4.基金项目
国家甘薯产业技术体系郑州综合试验站项目(CARS-11-C-14) （CARS-11-C-14）
河南省科技攻关重点项目(132102110156) （132102110156）
