基于临界氮浓度稀释模型的棉花开花后氮动态需求定量诊断研究

Acta Agron Sin ›› 2006, Vol. 32 ›› Issue (10): 1579-1585.

• RESEARCH NOTES • Previous Articles Next Articles

Mathematical Model of Quantitative Diagnosis on Dynamic Nitrogen Demand of Cotton after Anthesis Based on Critical Nitrogen Concentration Diluation Model

XUE Xiao-Ping^{1 2},WANG Yi-Lin²,GUO Wen-Qi¹,CHEN Bing-Lin¹,ZHOU Zhi-Guo^{1 *}

1Key Laboratory of Crop Growth Regulation of the Ministry of Agriculture，Nanjing Agricultural University, Nanjing 210095，Jiangsu ;2Shandong Province Meteorological Centure,Jinan 250031,Shandong,China

Received:2006-11-29 Revised:1900-01-01 Online:2006-10-12 Published:2006-10-12
Contact: ZHOU Zhi-Guo

Abstract

Abstract: The critical nitrogen concentration of a plant can be defined as the minimum nitrogen concentration required for maximum biomass grown at any time. The critical nitrogen concentration dilution curve can be described by the power equationCN_EN=a×DM^-b_M , FN_C=aⅹDM^-b_M,where CN_FNC(%) is the total nitrogen concentration in the aboveground dry matter,DM_M is the aboveground biomass(mg·ha^-1,a represents the nitrogen concentration in aboveground dry biomass when DM_M =1 mg·ha^-1 and b is a statistical parameter g...

Key words: Cotton, Critical nitrogen concentration, Growth rate, Nitrogen uptake rate, Nitrogen demand

CLC Number:

S562

XUE Xiao-Ping ;WANG Yi-Lin;GUO Wen-Qi;CHEN Bing-Lin;ZHOU Zhi-Guo. Mathematical Model of Quantitative Diagnosis on Dynamic Nitrogen Demand of Cotton after Anthesis Based on Critical Nitrogen Concentration Diluation Model[J].Acta Agron Sin, 2006, 32(10): 1579-1585.

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