Study on the Difference of Nitrogen and Phosphorus Uptake of Different Genotypes of Proso Millet(Panicum miliaceum L.)Varieties
This study selected ten main varieties of proso millet grown in different ecological areas and conducted field trials in 2017 and 2018 to study the differences in nitrogen and phosphorus uptake of different proso millet varieties.The results showed that the dry matter accumulation,nitrogen and phosphorus uptake and yield of different proso millet varieties were significantly different.Compared with the main variety Longmi 14,the dry matter accumulation of Neimi 6,Ningmi 14 and Chimi 1 reached 72.9％,74.9％and 77.0％,respectively,the phosphorus absorption reached 67.1％,75.2％and 85.2％,respectively,and the nitrogen absorption reached 71.9％,80.1％and 79.6％,respectively.However,the dry matter accumulation,nitrogen absorption and phosphorus absorption of Jinshu 7,Neimi 8,Yumi 3,and Longmi 13 reached 136.2％-166.6％,131.2％-176.8％,and 144.8％-201.6％,respectively,of which Longmi 13 had the highest dry matter accumulation and nutrient absorption.In terms of yield and its components,compared with other varieties,Jinshu 7 had the highest panicle weight and grain weight per panicle,Ningmi 14 and Neimi 6 had the highest panicle number,and Neimi 6,Neimi 8,and Ningmi 14 had the highest yield.The N/P of different proso millet varieties showed that high N/P before jointing and low N/P after jointing were beneficial to dry matter accumulation and yield formation of proso millet,and the N/P at different growth stages could also be used as an important index for selecting high-yield proso millet.
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