磷酸二氢钾施用量对一年生菘蓝生长动态的影响

Effects of Potassium Dihydrogen Phosphate Application Amount on the Growth of Annual Isatis indigotica Fort.

在临夏回族自治州东乡族自治县研究了不同磷酸二氢钾施肥量对一年生菘蓝生长动态的影响。结果表明,当磷酸二氢钾施用量为400 kg/hm^2时,菘蓝的株高、根长、根粗、植株干重较大;当磷酸二氢钾施用量为800 kg/hm^2时,菘蓝的叶片数、叶面积最大。在以收获大青叶为目的的生产中,磷酸二氢钾施用量为800 kg/hm^2时产量较佳;以收获板蓝根为目的的生产中,磷酸二氢钾施用量为400 kg/hm^2时产量最佳。

In this study,the effects of different fertilizing amounts of potassium dihydrogen phosphate on the growth dynamic of annual Isatis indigotica were researched. The results show that when 400 kg/hm^2 of potassium dihydrogen phosphate applied,the plant height,root length,root diameter,and plant dry weight of Isatis indigotica reached maximum. When 800 kg/hm^2 of potassium dihydrogen phosphate applied,the number of leaves and leaf areas were the largest. Therefore,it is better to apply potassium dihydrogen phosphate at the rate of 800 kg/hm^2 in the production for the purpose of harvesting Isatidis folium,and to apply potassium dihydrogen phosphate at the rate of 400 kg/hm^2 in the production for the purpose of harvesting Isatis radix.