When the flowering period is not met, it means that the maternal spit encounters with the male buddy loose powder or it does not meet, resulting in low seed setting rate and even failure of seed production. Therefore, the analysis of the reasons for the unsatisfactory flowering period and the study of the flowering period adjustment measures are of great significance to improving the seed production.
First, the reasons for the unexpected flowering
1, should be wrong sowing without wrong sowing.
2. New combinations imported from other countries will be planted on the wrong date according to field data without trials.
3, the wrong time sowing combination, in the sowing of one of the parents of the disaster weather, can not be scheduled sowing or sowing late sowing.
There are two situations that are more common in seed production. First, some seed production units want to produce a little more seeds. In the management of Tianwen's management, "re-emphasis on fathering and ignoring the father" has resulted in the rapid growth of the female parent, which artificially caused the unbalanced flowering period; second, the lack of understanding of the characteristics of the parents and the degradation of the seeds. It can also cause irregular flowering.
Second, the adjustment of flowering
1. Use slow-growing seedlings, leave seedlings, no fertilization, no loose soil and other control measures to inhibit growth for fast-growing parents; take slow-growing parents to take early seedlings, leave large seedlings, fertilize more, and loosen soil and other promotion measures to speed up fertility schedule.
2. The fast-growing parents in the jointing stage can increase the rate of vegetative growth by increasing the rate of available ammonia fertilizers. The application of phosphorus and potassium fertilizers to the slow-growing parents can enhance the transformation of vegetative growth and reproductive growth and accelerate the development process.
3, flowering pollination poor flowering encounter, to strengthen artificial pollination. The mother is early, when the filaments are too long, they must be cut short (leaving 1.7-3.3 cm) to facilitate pollination and fruiting; if the father is earlier, the female parent must strip off the leaves or take a leaf to become male. After cutting the fruit, cut the loquat leaves to promote spinning. According to the experiment, the fruit with leaves or detasseled than the conventional standard castrated fruit was spun silk for 1.5-2 days. Since the detasseling of the female parent can promote silking, it will affect the seed production, so it is used only when there is a last resort. If the male parents are drawn too early and the flowering date is not met, they cannot use the method of early male fertility. At this time, it is necessary to act in a timely manner to reverse or simply not to go to the merchandise corn production process.
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