林业废弃物山核桃果皮黄酮对作物苗期营养吸收的影响

以盆栽小麦、玉米、大豆和绿豆幼苗为材料，研究了6个浓度山核桃黄酮提取液（0.1～2.0 mg·L ^－1）处理对四种作物幼苗新生根系的电导率、根系活力、硝酸还原酶活性、营养元素吸收、生物量的影响．结果显示：0.1～0.5 mg·L ^－1黄酮提取液对四种作物的苗期营养生长具有良好的促进效应，小麦和绿豆的根系活力分别为0.29、0.35ug ．dg ^－1．h^－1，比对照提高40％～24％，大豆和玉米的硝酸还原酶活性分别是49.9、53.1mg ．L ^－1，比对照增加54％～24％，处理对四种作物的影响达极显著或显著水平（ P＜0.01，P＜0.05）；适宜浓度的黄酮提取液能显著增加幼苗的鲜重与干重；促进根系对N、K、Ca、M g、Fe、M n、Cu和Zn的吸收，但对四种作物促进效应的浓度各有差异．研究表明：适宜浓度的山核桃黄酮提取液具有促进四种作物苗期生长、改善幼苗新生根系对矿质营养吸收的作用．

Effects of Forestry Waste C .Cathayensis Exocarp Flavone on Nutritive Absorptionof Different Kinds of Crops Seedling

Using potted wheat ,corn ,soybean and mung bean as the materials ,studied the effects of different treatments with six kinds of concentration （0.1 - 2.0 mg · L^ -1 ） of flavone extract from C .cathayensis exocarp on the relative electrical conductivity ,root activity ,nitrate reductase activity , nutritive absorption of four kinds of crop seedlings new roots , on the influence of biomass .The results showed that within the range of concentrations of 0.1- 0.5 mg · L^ -1 flavone extract promoted the nutrition grow th on the four kinds of crop at seedling stage .The root activity of the wheat and mung bean seedlings were 0.29 and 0.35ug .dg -1 . h^-1 ,higher than CK , 40% - 24% , the nitrate reductase activity of the corn and soybean seedlings were 49.9 and 53.1mg .L ^-1 ,increased 54% -24% .The effects of flavone extract on the four kinds of crop reached the significant or extremely significant level （ P〈 0.01 ,P〈0.05）;A suitable concentration of flavone extract can significantly increase the seedling fresh weight and dry weight ;promote the root absorption on N ,K ,Ca ,Mg ,Fe ,Mn ,Cu and Zn , but on four kinds of crop improvement effect concentrations vary .Research showed that the appropriate concentration of flavone extract from C .cathayensis exocarp could promote the grow th of four kinds of crop seedlings ;improve the effect of the mineral nutrient absorption on seedling new born roots .