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Magnesium fertilizer application increases peanut growth and pod yield under reduced nitrogen application in southern China

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The Crop Journal 2024年第3期12卷 915-926页

作者： Yu Gao Ruier Zeng Suzhe Yao Ying Wang Jianguo Wang Shubo Wan Wei Hu Tingting Chen Lei Zhang Guangdong Provincial Key Laboratory of Plant Molecular Breeding College of AgricultureSouth China Agricultural UniversityGuangzhou 510642GuangdongChina Shandong Academy of Agricultural Sciences Jinan 250100ShandongChina College of Agriculture Nanjing Agricultural UniversityNanjing 210095JiangsuChina

This study investigated the effect of magnesium application on peanut growth and yield under two nitrogen(N)application rates in acidic soil in southern *** chlorophyll content,net photosynthetic rate and dry matter accumulation of the N-sensitive cultivar decreased under reduced N treatments,whereas no effect was observed on the relevant indicators in the N-insensitive variety *** application increased the net photosynthetic rate by increasing the expression of genes involved in chlorophyll synthesis and Rubisco activity in the leaves during the pegging stage under 50%N treatment,while no effect on the net photosynthetic rate was observed under the 100%N *** rate of dry matter accumulation at the early growth stage,total dry matter accumulation and pod yield at harvest increased after Mg application under 50%N treatment by increasing the transportation of assimilates from stems and leaves to pods in both peanut varieties,whereas no effect was found under 100%N ***,Mg application increased the NUE under 50%N *** improvement of NUE in either peanut variety was found under 100%N treatment,while Mg application under the 50%N treatment can obtain a higher economic benefit than the 100%N *** acidic soil,application of 307.5 kg ha^(-1)of Mg sulfate fertilizer under 50%reduced nitrogen application is a suitable fertilizer management measure for improving carbon assimilation,NUE and achieve high peanut yields in southern China.

关键词： Peanut Magnesium Yield reduced nitrogen application rate

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