养分对当归干物质积累及其产量的影响

The Change of Accumulation and yield of Dry matter in Chinese angelica Treated with Nutrient

以不同种类的氮磷肥组合为主效因子对当归干物质积累及分配动态进行研究,结果表明,施用不同种类的化肥对当归茎叶生长无明显的促进作用,但可使当归总干物质积累量和单产普遍增加.生长后期(10月16日)其总干物质积累量比不施肥处理(对照)增加6.1%～71.4%,其中以施用硝铵处理的效果最好,当归总干物质积累量为25.2g/株,较对照高10.5g/株;其次为施用尿素+过磷酸钙的处理,总干物质量均为22.5 g/株,较对照高7.8 g/株.当归单产以施用硝铵处理的最高,为2200.0kg/hm2,较对照增产96.69%,差异达极显著水平;其次为施用尿素+过磷酸钙的处理,单产为1985.19kg/hm2,较对照增产77.48%.

Study on the change of accumulation and yield of dry matter in Chinese angelica shows that the fertilizer can not obviously promote the growth of leaf and stem but can make the amount of dry matter and yield increase,taking the different kinds of fertilizer and N P combination as the main facter.During the latter growing period(on 16 Oct),the amount of dry matter increases by 6.1%~71.4% comparing with CK. Ammonium-nitrate's effect is the best.It can make the amount of dry matter increase 71.4% and be 25.2g/plant ,and make the individual yield increase by 96.69% , up to 2200㎏/hm2 . the next are Phosphor two ammonium [(NH4)2HPO4] and the combination of urea and calcium superphosphate.The both amounts of dry matter are 16.0g/plant.They are higher than CK by 1.3g/plant.The combination of urea and calcium superphosphate can make the individual yield up to 1985.19kg/hm2 ,increase 77.48% ,comparing with CK.