What conditions affect the increase in the seed setting rate of sunflower hybrids?
Mushroom Laiwu Manhing Vegetables Fruits Corporation , https://www.manhingfood.com
(1) Arid sunflower is a drought and salt-tolerant crop, but from the bud to the end of flowering, the sunflower needs the largest amount of water, which accounts for about 60% of the water requirement for the whole growing season. If there is a shortage of water during this period, Will cause poor pollination or pollen abortion, resulting in increased empty grains, production decline. (2) Poor management In some areas, planting sunflowers is mostly used for filling crops or planting in front of houses. Farmers only manage sowing and harvesting while neglecting watering, fertilizing, pest control, and so on, resulting in lack of water and lack of fertilizer during the sunflower breeding period. Growth was hindered, empty grains increased, and yield decreased. (3) The lack of media sunflower is cross-pollination crops, mainly relying on insect pollination. If there is a lack of media, it will affect pollination and fruition, resulting in an increase in empty grains. (4) Variety factors According to foreign studies, the sunflower seed setting rate is negatively related to the thickness of the stalk and the diameter of the flower disk. That is, the thicker the stem, the larger the disk, the more empty pods are. (5) Climate factors In the process of flowering and pollination, in the event of low temperatures and rainy days, the flowering period is postponed, the flowering of the floret is reduced, and the stamen and mature time of the stamens are pushed back. When it encounters high temperature, drought and dry weather, the flowering period is advanced, the pollen volume is reduced, and the viability is weakened. The fertilization process cannot proceed normally and some flowers cannot be pollinated.