LI Jinxin,LIU Yu,YANG Yawen,et al.Effects of Different Potassium Application Rates on Growth, Yield and Quality of Two-year-old Belamcanda chinensis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(23):142-148.
LI Jinxin,LIU Yu,YANG Yawen,et al.Effects of Different Potassium Application Rates on Growth, Yield and Quality of Two-year-old Belamcanda chinensis[J].Chinese Journal of Experimental Traditional Medical Formulae,2022,28(23):142-148. DOI: 10.13422/j.cnki.syfjx.20221312.
Effects of Different Potassium Application Rates on Growth, Yield and Quality of Two-year-old Belamcanda chinensis
To investigate the effects of different potassium application rates on the growth, yield and quality of two-year-old
Belamcanda chinensis
and to provide a basis for potassium application to achieve high yield and quality of
B. chinensis
.
Method
2
On the basis of nitrogen and phosphorus fertilization at 120 kg·hm
-2
, we designed five potassium treatments of 0 (K
0
), 60 (K
60
), 120 (K
120
), 180 (K
180
) and 240 (K
240
) kg·hm
-2
in a field experiment to study the effects of different potassium application rates on the agronomic traits, rhizome yield, flavonoid content and potassium fertilizer utilization efficiency of the two-year-old
B. chinensis
.
Result
2
The application of potassium fertilizer promoted the root development and tillering, which significantly improved the yield of
B. chinensis
. Compared with the K
0
treatment, the other potassium treatments increased the rhizome yield by 16.0%-44.0% and K
180
had the highest yield. The application of potassium fertilizer increased the accumulation of flavonoids in the rhizomes of
B. chinensis
. The total accumulation of six flavonoids (mangiferin, tectoridin, iridin, tectorigenin, irigenin and irisflorentin) increased by 33.2% in the K
120
treatment compared with that in the K
0
treatment. Furthermore, the application of potassium fertilizer promoted the accumulation of N, K, Mg, Fe and Zn. With the increase in potassium application rate, the potassium accumulation of
B. chinensis
first increased and then decreased, while the partial productivity and the absorptivity of roots and leaves gradually decreased. The agronomic efficiency of potassium fertilizer was higher at low to medium potassium application rates and decreased significantly at high potassium application rates. The results of the principal component analysis indicated that the ranking of the overall quality score of
B. chinensis
was K
120
>
K
180
>
K
240
>
K
60
>
K
0
.
Conclusion
2
Considering factors such as yield, quality and potassium utilization efficiency of two-year-old
YAN Z , HOU X , HAN W , et al . Effects of nitrogen and phosphorus supply on stoichiometry of six elements in leaves of Arabidopsis thaliana [J]. Ann Bot , 2019 , 123 ( 3 ): 441 - 450 .