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向日葵是需钾肥较多的作物,每生产100斤葵花籽,比生产100斤高粱需氮、磷肥高2倍,需钾则高6倍.据试验,每施用1斤硫酸钾可增产2.3斤葵花籽,施用1斤草木灰增产0.6斤葵花籽,而施用1斤过磷酸钙仅增产1.08斤.施用钾肥还能降低向日葵的空壳率,增加粒重,增强抗病能力.据红帽子农科队测定,每亩施用17斤硫酸钾,空壳率可减少18%,百粒重增加2.02克.
Sunflower is required more potassium crops, each producing 100 kg of sunflower seeds than the production of 100 kg of sorghum need nitrogen, phosphate fertilizer 2 times higher, potassium is 6 times higher.According to the test, each application of 1 kg of potassium sulfate can yield 2.3 kg of sunflower Seeds, the application of 1 kg of ash to increase production of 0.6 kg sunflower seeds, while the application of 1 kg of superphosphate only increased yield 1.08 kg.Application of potassium can also reduce the sunflower shell percentage, increase grain weight, enhance disease resistance.According to red hat agricultural team determination , Application of 17 kg of potassium sulfate per acre, shell rate can be reduced by 18%, 100 weight gain 2.02 grams.