Acta Agriculturae Boreali-Sinica ›› 2025, Vol. 40 ›› Issue (4): 136-145. doi: 10.7668/hbnxb.20195509

Special Issue: Wheat Soil fertilizer

• Resources & Environment·Plant Protection • Previous Articles     Next Articles

Effects of Nitrogen Application on Nitrogen Accumulation,Transport, Yield and Quality of Soft Wheat under Weak Light Stress after Anthesis

YANG Tingting1, LI Jing1, ZHANG Ruilian1, CHEN Juan1, YAN Suhui1, WANG Jianlai2, LI Wenyang1,   

  1. 1 College of Agriculture,Anhui Science and Technology University,Fengyang 233100,China
    2 Institute of Crop,Anhui Academy of Agricultural Sciences,Hefei 230031,China
  • Received:2024-10-18 Published:2025-08-28

Abstract:

To explore the effects of nitrogen application rate on nitrogen uptake and translocation characteristics,nitrogen use efficiency,and the formation mechanisms of yield and quality in soft wheat under weak light stress during the after anthesis stage,under pot conditions,the soft wheat variety Quanmai 725(QM725)was used as the material,and the 15N tracer method was used.Two nitrogen rates were set in the experiment,namely N1(N 120 kg/ha),N2(N 180 kg/ha),and two shading treatments were set at the wheat filling stage(7-35 d after anthesis)under each nitrogen application rate,namely CK(no shading),SH(30% shading).The relationship between nitrogen application rate and grain yield and quality of soft wheat under weak light after anthesis was analyzed,and the effects of different nitrogen application rates on nitrogen accumulation,transport,grain yield and quality of soft wheat under weak light after anthesis were studied.The results showed that compared with the control,under the conditions of N1 and N2,the nitrogen accumulation of plants at flowering stage and vegetative organs at maturity stage was significantly reduced by weak light treatment after anthesis,and the proportion of nitrogen from fertiliser was significantly higher than that from soil nitrogen,while the proportion of nitrogen accumulation in grains at maturity stage from soil nitrogen was significantly higher than that from fertiliser nitrogen.Under the same nitrogen application rate,the proportion of basal nitrogen fertiliser was greater than that of topdressing nitrogen fertiliser.Under the same weak light treatment conditions,compared with N1,N2 increased the accumulation of fertiliser nitrogen at flowering stage,the accumulation of total nitrogen and fertiliser nitrogen at maturity stage,and the accumulation of total nitrogen,fertiliser nitrogen and soil nitrogen at maturity stage.Under N1 and N2 treatments,the nitrogen harvest index,nitrogen harvest index,nitrogen production efficiency,grain number per spike,1000-grain weight and grain yield of wheat decreased significantly with the decrease of light intensity after anthesis.The content and accumulation of protein and starch in soft wheat grains increased significantly with the increase of nitrogen fertilizer.However,under the same nitrogen application rate,weak light stress reduced the starch content,protein and starch accumulation in grains.Weak light stress after anthesis significantly affected the nitrogen accumulation of soft wheat plants,reduced the transport efficiency of storage substances from vegetative organs to grains after anthesis,resulting in a decrease in the contribution rate of vegetative organs to grains,which was not conducive to the overall nitrogen transport efficiency of plants.With the increase of nitrogen application rate,the nitrogen harvest index,nitrogen harvest index,nitrogen production efficiency and nitrogen use efficiency of wheat were significantly improved.Under the same nitrogen application rate of N1 and N2,after anthesis weak light stress significantly reduced the accumulation of protein and starch in soft wheat grains,which in turn affected the formation of grain weight,resulting in a decrease in yield.

Key words: Soft wheat, Nitrogen application rate, Weak light, 15N tracer, Nitrogen accumulation and transport, Yield, Quality

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Cite this article

YANG Tingting, LI Jing, ZHANG Ruilian, CHEN Juan, YAN Suhui, WANG Jianlai, LI Wenyang. Effects of Nitrogen Application on Nitrogen Accumulation,Transport, Yield and Quality of Soft Wheat under Weak Light Stress after Anthesis[J]. Acta Agriculturae Boreali-Sinica, 2025, 40(4): 136-145. doi: 10.7668/hbnxb.20195509.

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