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Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (21): 43-46.doi: 10.11924/j.issn.1000-6850.casb15010165

Special Issue: 玉米

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Study on the NPK Uptake of Sweet Corn Under Different Planting Densities

  

  • Received:2015-01-21 Revised:2015-02-02 Accepted:2015-02-04 Online:2015-07-28 Published:2015-07-28

Abstract: The field experiment was conducted to study the effect of planting density on the sweet corn yield and NPK uptake in order to supply theoretic basis for nutrient optimized management with the aim of high yield, excellent grain quality, high efficiency of nutrient resource and environment friendly. The main results were as follows: the fresh ear yield of sweet corn was 9179, 10285, 11664 kg/hm2, respectively, under low density (51282 plant/hm2), medium density (61538 plant/hm2) and high density (76923 plant/hm2). At the same amount of NPK fertilizer, the total nitrogen uptake of sweet corn stover and grain at harvest stage was 65.5, 89.1, 122.5 kg/hm2, total phosphorus uptake was 14.5, 15.3, 20.1 kg/hm2, and total potassium uptake was 81.6, 98.2, 130.0 kg/hm2, respectively, under low density, medium density and high density. The sweet corn fresh ear yield and total NPK uptake increased significantly with the planting density increasing.