Effect Of Foliar Application Of Zinc On Millet Quality And Yield

In order to improve yield of millet in Shanxi central area and enhance millet nutrition and function through providing scientific cultivation techniques,this experiment studies the most optimal spray concentration and time of using zinc fertilizer on Nongda 8 and Nongda 10 millet to improve scientific cultivation techniques of increasingyield and enhancing nutrition and function of millet in Shanxi central area.This experiment adopts split-split plot design,namely,spray concentration : 0 g/L（CK）,0.002 g/L（T1）,0.004 g/L（T2）,0.008 g/L（T3）,measures agronomic traits and photosynthetic parameters at 3,7,15 and 30 days respectively after spray and investigates yield traits,quality and zinc content after maturity.The following conclusions are drawn:In the period of elongation,the plant height,stem diameter and leaf area of Nongda 8 milletmaximized at T2,The photosynthetic characteristics became more active in line with concentration growth.The yield and yield components shows the trend of decreasing after increasing first with increasing concentration.The spike length and thick reached to the optimum at T1 and the other yield and yield components maximized at T2.With increase of concentration,the content of protein,fat and yellow pigments shows the trend of decreasing after increasing first and maximized at T2.The content of straight chain starch decreased merely at T1.The zinc content increased slightly with increasing concentration.In the period of elongation,increases of plant height,stem diameter and leaf area of Nongda 10 milletshows the trend of decreasing after increasing first with the increase of spray concentration and maximized at T2.The relative chlorophyll content,net photosynthetic rate,transpiration rate all maximized at T2.The stomatal conductance and intercellular CO₂ concentration maximized at T1.The yield and yield components maximized at T2.The content of protein and straight chain starch maximized at T1.The content of fat and yellow pigment maximized at T2 and the content of zinc maximized at T1.In the heading period,the plant height,stem diameter and leaf area of Nongda 8 milletmaximized at T2.The relative chlorophyll content,net photosynthetic rate,transpiration rate and stomatal conductance also increased at same time and maximized at T2.The intercellular CO₂ concentration decreased significantly at T2.The yield components grew with the shows the trend of decreasing after increasing first and maximized at T2.The millet quality indicators all reached to the optimum at T2.The zinc content maximized at T2.In the heading period,increases of plant height,stem diameter and leaf area of Nongda 10 millet shows the trend of decreasing after increasing first with the increase of zinc sulfate spray concentration.With the increase of spray concentration,the relative chlorophyll content,net photosynthetic rate,transpiration rate and stomatal conductance all maximized at T2 while intercellular CO₂ concentration minimized at T2.The yield and yield components maximized at T2.The content of protein maximized at T3.The content of straight chain starch,yellow pigment and fat reached to the optimum at T2.The zinc content maximized at T2.In the filling stage,all the agronomic traits of Nongda 8 millet increased with increasing spray concentration except the intercellular CO₂ concentration.The relative chlorophyll content,transpiration rate,stomatal conductance all maximized at T2.The net photosynthetic rate maximized at T1 while intercellular CO₂ concentration minimized at T1.The yield and yield components shows the trend of decreasing after increasing first with increasing spray concentration and reached to the optimum at T2.The content of protein and fat maximized at T2 and the yellow pigment and content of straight chain starch maximized at T3.In the filling stage,the relative chlorophyll content,net photosynthetic rate,transpiration rate and stomatal conductance of Nongda 10 millet increased with increasing spray concentration of different zinc sulfate concentration and maximized at T2 while the intercellular CO₂ concentration minimized at T2.The yield and yield components maximized at T2.The content of protein and fat maximized at T2.The yellow pigment content maximized at T3 while the straight chain starch content minimized at T3.The zinc content maximized at T3.