How to fertilize sunflowers?
How to fertilize sunflower? Sunflower production of 100 kg sunflower seeds, edible sunflower nitrogen (N)6.22 kg, phosphorus (P2O5)1.33 kg, K2O14.6 kg, N: P2O5: K2O 1: 0.2:2.3; oil sunflower nitrogen (N)7.44 kg, phosphorus (P2O5)1.86 kg, K2O16.6 kg, N: P2O5: K2O 1: 0.3:2.3. Sunflower has different N, P and K uptake in different growth stages. The amount of nitrogen (N), phosphorus (P 2O 5) and potassium (K 2O) absorbed accounted for 14%, 20% and 24% of the total amount in the whole growth period. The main function of nutrients at this stage is to promote strong seedlings and lay the foundation for high yield. From flower disk formation to full bloom, vegetative growth and reproductive growth were vigorous, dry matter accumulation was the fastest, which was the key period for nutrient requirement in life. The amount of nitrogen (N), phosphorus (P 2O 5) and potassium (K 2O) absorbed accounted for 51%, 53% and 47% of the total amount in the whole growth period (edible sunflower). Sunflower can enter full bloom 3-5 days after flowering, and gradually enter mature stage after pollination. Sunflower is still absorbing a certain amount of nitrogen, phosphorus and potassium in mature stage, and edible sunflower absorbs 35%. 27% and 29%, oil absorption with sunflower 30%, 35% and 24%. Click for more sunflower cultivation technology Click for more food crop cultivation technology
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Why do sunflower seeds produce empty seeds?
Why do sunflower seeds produce empty seeds? Please give an introduction to the main reasons why planting sunflower will produce empty grain can refer to the following: 1. Empty grain caused by drought: Sunflower is a crop with strong drought resistance. However, the water requirement is the largest from the formation of flower disc to the end of florescence, accounting for about 60% of the water requirement in the whole growth period.
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Cassava cultivation: what should be paid attention to in cassava cultivation?
What should be paid attention to in cassava planting? Please give an introduction to the following points to pay attention to when planting cassava: first, turn the soil deeply and change the soil: one month before planting cassava, turn the soil into a plough to make the soil fully weathered. When planting, 250 kilograms of phosphate fertilizer composting with livestock manure was applied per mu as base fertilizer. Two.
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