氮、磷、钾肥对丹参根系生长及养分含量的影响

采用田间小区试验方法,研究了氮、磷、钾肥对丹参根系生长及养分含量的影响。结果表明,氮、磷、钾肥能够促进丹参根系对氮、磷、钾的吸收,提高其含量,并且随着施用量的增加而提高,在N,P2O5,K2O的施用量分别为225,180,225 kg/hm2时,根的氮、磷、钾含量达到最高值;当施入N,P2O5和K2O分别为225,120,150 kg/hm2时,丹参根干质量、根长及根条数达到最高值,根的直径最适宜,此后随着磷钾肥施入量增加,根干质量及根长、根条数反而下降,根直径增加。所以氮、磷、钾合理配合施用能够提高丹参根的养分含量、根干质量、根长、根数及根直径。

Effects of N,P and K Fertilizer on Roots Growth and Nutrition Content of Salvia miltiorrhiza

The article discussed the effects of N,P and K fertilizer on the Salvia miltiorrhiza root system growth and the nutrient content.This research was studied by the field plot experiment.The result showed that N,P and K fertilizer were advantage to enhance the nutrient absorption of Salvia miltiorrhiza root and increased N,P and K content.And with the amount of fertilizer increasing,the N,P and K content of root also enhanced.When the amount of N,P2O5,and K2O were 225,180,225 kg/ha respectively,the nutrition content of root reached the maximum.When the amount N,P and K were 225,180,150 kg/ha respectively,the dry weight,length and the number of root reached maximum.After that,if the amount of N,P and K fertilizer increased again,the dry weight,the length and the number of root decreased,but the root diameter increased.So,N,P and K were in harmony with each other,it could enhanced the nutrition content,dry weight,the length,the number and diameter.