Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2013, Vol. 29 ›› Issue (9): 57-60.doi: 10.11924/j.issn.1000-6850.2012-1595

Special Issue: 小麦

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Effect of Post-anthesis Nutrient Regulation on Dry Matter Production, Nitrogen Uptake and Nitrogen Remolilization During Grain-filling in Winter Wheat

  

  • Received:2012-04-25 Revised:2012-07-04 Online:2013-03-25 Published:2013-03-25

Abstract: Post-anthesis nutrient regulation has been regarded as a promising way to delay premature senescence and increase kernel size in agronomic practices. In order to determine the effect of post-anthesis different nutrient regulation strategies on both dry matter production and N translocation for high yielding winter wheat, in addition to providing the theoretical support on post-anthesis nutrient regulation for high yielding winter wheat, we conducted a research in field involving post-anthesis once N fertilizer, fourth N fertilizer, spraying KH2PO4 to investigate effect of the each treatment on grain-filling and remobilization of N. Under favorable high yield conditions, control (without inputs of N) attained 8.7 t/hm2. Even though under high yield conditions, post-anthesis nutrient regulation could increase yield (once N fertilizer 8.9% , fourth N fertilizer 9.9% , spraying KH2PO4 11.6% ) in comparison with control. Compared with control, post-anthesis nutrient regulation not only increased post-anthesis dry matter and N uptake, but also promoted remolibition of assimilate and N stored in vegetative tissues. Consequently, it was proposed that, assuring the adequate N situation in combination with spraying KH2PO4 could mitigate earliness induced by stress and improve the grain filling process.