Effects of Mineral Potassium Humate with Different Concentrations on Rice Seed Germination and Growth
The effects of different concentrations of mineral potassium humate on rice seed germination and changes in seedling-related physiological indicators to provide basis for the scientific application of humic acid.Using rice seeds as the test material and distilled water as the control,different concentrations of mineral potassium humate solutions(50,100,200,300,400 and 500 mg/L)were prepared for seed soaking.Through pot experiments,the seed germination rate and germination potential,germination index,as well as plant height,root length,root diameter,fresh weight and dry weight of the seedlings were determined.The results showed that seed soaking with 50～500 mg/L potassium humate promoted the germination of rice seeds to varying degrees,effectively improving seed germination potential,germination rate,germination index,promoted growth of plant height and root length,and accumulation of fresh and dry weights of seedlings.Under the test conditions,the best effect was achieved when the concentration of potassium humate was 500 mg/L.
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