文献类型： 外文期刊
作者： Li, Chunhua 1 ; Wang, Jidong 1 ; Zhang, Yong Chun 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Agr Resources & Environm Inst, Sci Observing & Expt Stn Farmland Conservat, Minist Agr, Nanjing 210014, Peoples R China
2.Dezhou Univ, Coll Ecol & Landscape Architecture, Dezhou, Peoples R China
关键词： dry matter; phosphorus deficiency; phosphorus uptake; root morphology; sweet potatoes
期刊名称：JOURNAL OF PLANT NUTRITION （ 影响因子：1.707； 五年影响因子：1.645 ）
ISSN： 0190-4167
年卷期： 2020 年 43 卷 9 期
页码：
收录情况： SCI
摘要： A column experiment was conducted to investigate the responses of root growth and phosphorus (P) efficiency among sweet potatoes-JiHei1 (JH1), NingZi2 (NZ2), SuShu11 (S11) and SuShu17 (S17)-under low P and normal P conditions. Root growth was inhibited by low P in root length and surface area across diameter classes, except for in S17. The P absorption was influenced and led to variations in P content among organs. A high correlation was observed in root dry matter (DM) and P uptake. The tuber DM declined among genotypes under low P, and different P efficiencies were determined. A higher phosphorus utilization efficiency was observed in S11 and S17, suggesting that more P was needed to maintain their normal growth. Physiological efficiency and phosphorus utilization efficiency were significantly positively correlated with the tuber DM, indicating that low P limited the growth of sweet potatoes. These results benefit the production and breeding of sweet potatoes in response to P deficiency.
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