Plant Soil Environ., 2022, 68(10):451-458 | DOI: 10.17221/173/2022-PSE

Effect of phosphorus application on economic yield, quality and phosphorus utilisation efficiency of purple-fleshed sweetpotatoOriginal Paper

Ming Liu1, Wenjing Fan2, Rong Jin1, Peng Zhao1, Qiangqiang Zhang1, Xiaoya Zhu1, Jing Wang1, Aijun Zhang1, Zhonghou Tang*,1
1 Xuzhou Sweetpotato Research Centre/National Agricultural Experimental Station for Soil Quality, Xuzhou, P.R. China
2 Anhui Agricultural University, Hefei, P.R. China

This study aims to explore the effect of phosphorus (P) application on the economic yield, quality, P accumulation, and P utilisation efficiency of purple-fleshed sweetpotato and to provide a basis for the P efficient utilisation and high crop yield. Field experiments were conducted in 2018-2019, and five P application rates (0, 10.9, 21.8, 32.7, and 43.6 kg P/ha, expressed as P0, P1, P2, P3, and P4, respectively) were set. The results showed that P application significantly increased the yield and commodity potato yield of purple-fleshed sweetpotato, and that of P3 treatment was the highest, followed by P2 treatment. P application also increased the starch content in the storage root and increased the reducing sugar and soluble sugar (except for P2 treatment). P fertiliser supply significantly increased P accumulation and dry matter production of purple-fleshed sweetpotato during the growth period of 90 to 120 days. When the P application rate was over 21.8 kg/ha, the fertiliser investment rate, apparent P utilisation efficiency and P agronomic efficiency decreased with the increase of the application rate. Considering all the indexes, the supply of 21.8 kg/ha P fertiliser can meet the demand for high economic yield and P efficient utilisation in purple-fleshed type sweetpotato under the condition of this experiment.

Keywords: food crops; macronutrient; fertiliser management; nutritional quality

Published: October 1, 2022  Show citation

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Liu M, Fan W, Jin R, Zhao P, Zhang Q, Zhu X, et al.. Effect of phosphorus application on economic yield, quality and phosphorus utilisation efficiency of purple-fleshed sweetpotato. Plant Soil Environ. 2022;68(10):451-458. doi: 10.17221/173/2022-PSE.
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