How to prevent empty sunflower seeds? You need to master these control methods
How to prevent empty sunflower seeds? Let me explain: empty seeds around the outer ring of the sunflower are mainly caused by poor pollination; empty seeds in the center of the sunflower are mainly caused by insufficient fertilizer and water and a lack of nutrients. Therefore, preventing empty sunflower seeds first means ensuring adequate fertilizer and water, and second means artificial supplementary pollination. First, strengthen fertilizer and water management. Sun...
How to prevent empty sunflower seeds? Let me explain
Empty seeds around the outer ring of the sunflower are mainly caused by poor pollination; empty seeds in the center of the sunflower are mainly caused by insufficient fertilizer and water and a lack of nutrients. Therefore, preventing empty sunflower seeds first means ensuring adequate fertilizer and water, and second means artificial supplementary pollination.
First, strengthen fertilizer and water management. The quality of water and fertilizer conditions for sunflowers is closely related to the empty-seed rate of sunflowers and to increasing yield. Experiments have shown that the empty-seed rate of sunflowers with adequate fertilizer and water is only 3.5%-5%.
Second, strengthen artificial pollination. When insect pollination is insufficient, artificial supplementary pollination is an effective way to increase the seed-setting rate. 2-3 days after sunflowers enter the flowering stage, carry out artificial supplementary pollination. During artificial supplementary pollination, gently touch the flower disk with a soft-bristle brush so that the pollen grains from the stamens stick to the soft-bristle brush, then touch the soft-bristle brush in the same way to another sunflower flower disk, and pollination has been carried out.
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