Effect of Application Mode of Potassium Fertilizer on Dry Matter Accumulation and Grain Yield of Sorghum
ZHOU Ziyang
MA Yinghui
WANG Jianghong
LI Guanghua
LIU Hailou
WANG Nai
Abstract：In order to determine the best application mode of potassium fertilizer, sorghum hybrids Jiza No. 305 and Jiza No. 87 were used as materials, and four treatments ( K0 without potassium, K1 with 120 kg/ha potassium as base fertilizer, K2 with 90 kg/ha potassium as base fertilizer, and 30 kg/ha potassium as additional fertilizer,K3 with 60 kg/ha potassium as base fertilizer,and 60 kg/ha potassium as additional fertilizer) were designed to study the effect of the application mode of potassium fertilizer on dry matter accumulation and grain yield. The results showed that the application of potassium fertilizer increased the sorghum plant leaf area,dry matter accumulation,grain starch content,yield and economic coefficient. The order of leaf area of two sorghum cultivars was K0 ＜K1 ＜K2 ＜K3,which of economic coefficient was K0＜K3＜K2＜K1,which of dry matter accumulation, grain starch content and grain yield were K0＜K3＜K1＜K2. For Jiza No. 305,the grain yield of K1, K2 and K3 treatments significantly in-creased by 9. 3%,15. 6% and 9. 3% respectively compared with K0 treatment. For Jiza No. 87,the grain yield of K1,K2 and K3 treatments significantly increased by 8. 1%,12. 5% and 8. 1% respectively com-pared with K0 treatment. Taken together,the best application mode of potassium fertilizer was 90 kg/ha potassium as base fertilizer and 30 kg/ha potassium as additional fertilizer.
Keywords：sorghumpotassiumdry matterstarch accumulationyield
Publication Date：2016-04-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 76-79 )