Effects of Different Potassium Application Rates on Growth， Yield and Quality of Two-year-old Belamcanda chinensis
10.13422/j.cnki.syfjx.20221312
- VernacularTitle:不同钾肥施用量对二年生射干生长、产量和品质的影响
- Author:
Jinxin LI
1
;
Yu LIU
1
;
Yawen YANG
1
;
Changjie CHEN
1
;
Ziling WANG
1
;
Yuhuan MIAO
1
;
Dahui LIU
1
Author Information
1. Pharmacy Faculty，Hubei University of Chinese Medicine， Wuhan 430065， China
- Publication Type:Journal Article
- Keywords:
Belamcanda chinensis;
potassium application rate;
yield;
quality;
potassium utilization efficiency
- From:
Chinese Journal of Experimental Traditional Medical Formulae
2022;28(23):142-148
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo 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. MethodOn the basis of nitrogen and phosphorus fertilization at 120 kg·hm-2， we designed five potassium treatments of 0 （K0）， 60 （K60）， 120 （K120）， 180 （K180） and 240 （K240） 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. ResultThe application of potassium fertilizer promoted the root development and tillering， which significantly improved the yield of B. chinensis. Compared with the K0 treatment， the other potassium treatments increased the rhizome yield by 16.0%-44.0% and K180 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 K120 treatment compared with that in the K0 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 K120>K180>K240>K60>K0. ConclusionConsidering factors such as yield， quality and potassium utilization efficiency of two-year-old B. chinensis， the potassium application at 120-166 kg·hm-2 is recommended for the production of B. chinensis in Tuanfeng County.
