作　　者： ; ; ; ; ; ; (刘辉）; (薛世跃）;

机构地区： 河南农业大学

出　　处： 《中国中药杂志》 2008年第16期1955-1959,共5页

摘　　要： 目的:研究怀牛膝氮、磷、钾吸收、分配和积累特点。方法:采用过氧化氢-硫酸消化法、钒钼黄比色法、火焰光度法测其氮、磷、钾的含量。结果:植株中氮、磷、钾的含量随生育期的推移而下降,其含量顺序为钾>氮>磷;植株对氮、磷、钾的吸收速率呈双峰曲线变化,吸收的最大速率期均处于10月中旬;每生产100 kg怀牛膝根需要氮、磷、钾分别为8.59,1.36,7.40 kg。结论:在9中旬和10中旬是养分吸收的关键时期,应保证养分的充足供应,注重氮肥和钾肥。 Objective： To study the absorption, translocation and accumulation of N, P and K on Achyranthes bidentata . Method： The contents of N, P and K were determined by mean of sulfuric acid-hydrogen peroxide assimilating method, vanadium-am- monium molybdate colorimetric method and flame photometric method, respectively. Result： The contents of N, P and K in the plant were decreasing during the growth period. The absorption rates of the three nutrients by A. Bidentata showed double-peak curves in the whole growth period, maximum absorption rate appeared in the middle ten days of October. About 8.59 kg of N, 1.36 kg of P and 7.40 kg of K were needed to produce each 100 kg root. Conclusion： The key nutrients absorption period is in the first ten days of September and in the middle ten days of October.

关 键 词： 怀牛膝 氮 磷 钾 吸收 分配 运转

领　　域： [农业科学] [农业科学]