Effects of fertilization on leaf photosynthetic characteristics and grain yield in tartary buckwheat Yunqiao1

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• 作者：C. Wang ; H. Z. She ; X. B. Liu ; D. Hu ; R. W. Ruan ; M. B. Shao…
• 关键词：Additional key wordschlorophyll ; fertilizer ; leaf area index ; net photosynthetic rate ; productivity
• 刊名：Photosynthetica
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：55
• 期：1
• 页码：77-84
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Plant Physiology;
• 出版者：The Institute of Experimental Biology of the Czech Academy of Sciences
• ISSN：1573-9058
• 卷排序：55

文摘

Tartary buckwheat (Fagopyrum tataricum Gaertn) has been praised as one of green foods for humans in the 21b>stb> century. Effects of fertilization on leaf photosynthetic characteristics and grain yield of tartary buckwheat has not been yet reported in detail. Our experiment was set as a split-plot factorial. The main plots and subplots were designed by fertilizer ratio and rate as: NPK 1:1:1 (A1), NPK 1:4:2 (A2), NPK 1:2:3 (A3), and 300 (B1), 450 (B2), and 600 (B3) kg (NPK) ha–1. Our results showed that the grain yield was significantly and positively correlated with the net photosynthetic rate (Pb>Nb>), stomatal conductance (gb>sb>), transpiration rate (E), PAR, stomatal limitation value (Lb>sb>), chlorophyll content (SPAD value), and leaf area index (LAI), while significantly and negatively correlated with intercellular COb>2b> concentration (Cb>ib>) and water-use efficiency (WUE). The grain yield, Pb>Nb>, gb>sb>, E, PAR, Lb>sb>, SPAD, and LAI increased and then decreased with enhanced fertilization, and their maximum values appeared in the A2B2 treatment. The Cb>ib> and WUE decreased and then increased with enhanced fertilization, and their minimum values appeared in the A2B2 treatment. Our results suggested that fertilization had significant effects on the leaf photosynthetic capacity and grain yield of tartary buckwheat Yunqiao 1, and the best fertilization strategy was 450 kg ha–1 with NPK 1:4:2.