Open Access
ARTICLE
Effects of Different Potassium (K) Fertilizer Rates on Yield Formation and Lodging of Rice
Tantan Zhang1,2,#, Xiaoping He3,#, Binglin Chen1,#, Longxin He1,2, Xiangru Tang1,2,*
1 State Key Laboratory for conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou, 510642, China
2 Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture, Guangzhou, 510642, China
3 Guangdong Tianhe Agricultural Materials Co., Ltd., Guangzhou, 510642, China
* Corresponding Author: Xiangru Tang. Email:
# These authors contributed equally to the work
(This article belongs to this Special Issue: High-Yield Rice Physiology & Genetics)
Phyton-International Journal of Experimental Botany 2021, 90(3), 815-826. https://doi.org/10.32604/phyton.2021.014168
Received 07 September 2020; Accepted 09 October 2020; Issue published 30 March 2021
Abstract
As one of the most important nutrients for plants, potassium (K) has substantial effects on growth and development of crops. Present study was conducted in three different sites in South China in late season in 2019 with the
objective to study the effects of different applied amounts of K fertilizer on yield formation and lodging of rice.
Four K fertilizer treatments, K
0: 0 kg potassium oxide (K
2O) ha
−1 (control); K
1: 64.20 kg K
2O ha
−1
; K
2: 128.55 kg
K
2O ha
−1 and K
3 153.90 kg K
2O ha
−1 were applied in the field experiment. The results showed that K
2 and K
3
treatments significantly increased panicle number per unit area, grain number per panicle, seed-setting rate and
the grain yield of rice compared with K
0 treatment. Higher net photosynthetic rates were recorded in K
2 and K
3
treatments than K
0 treatment at tillering stage, heading stage and maturity stage. K fertilizer treatments also
increased the chlorophyll content and dry matter accumulation by 6.16–23.52% and 21.32–64.59% compared
with K
0 treatment, respectively. Moreover, the total N and K accumulation in the aboveground tissues of rice significantly increased under K
2 and K
3 treatments compared with K
0 treatment. Furthermore, compared with K
0
treatment, K fertilizer treatments significantly enhanced the breaking-resistant strength by 40.94–144.24% and
reduced the lodging index of rice by 13.14–36.72%.
Keywords
Cite This Article
Zhang, T., He, X., Chen, B., He, L., Tang, X. (2021). Effects of Different Potassium (K) Fertilizer Rates on Yield Formation and Lodging of Rice.
Phyton-International Journal of Experimental Botany, 90(3), 815–826.