Details

Autor(en) / Beteiligte

• Du, Xiang Bei
• Wang, Jia Bao
• Liu, Xiao Ping
• Xia, Jia Ping
• Han, Yang

Titel

Effects of nitrogen fertilizer reduction management on photosynthesis and chlorophyll fluorescence characteristics of sweetpotato

Ist Teil von

• Ying yong sheng tai xue bao, 2019-04, Vol.30 (4), p.1253-1260

Ort / Verlag

China

Erscheinungsjahr

2019

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Crop productivity depends on photosynthetic source capacity. Appropriate nitrogen (N) fertilizer management is beneficial for improving growth, photosynthetic capacity and thereby increasing crops yield. A two-year pot experiment was conducted with four N treatments, i.e., conventional basal application 100 kg N·hm as control (FP), a total of 80 kg N·hm applied either 100% at basal application (JS), 100% at tuber initiation stage (35 d after transplant, KS), 50% at basal application and 50% at tuber initiation stage (35 d after transplant, FS), to examine the effects of reduced nitrogen fertilizer combined with application methods on the photosynthesis and chlorophyll fluorescence characteristics of sweetpotato (Ipomoea batatas) during summer 2016 and 2017. The results showed that the conventional basal application of a reduced N rate decreased photosynthesis of sweetpotato during the final growth phases compared to conventional application, dressing application relatively delayed late-season leaf senescence