Knowing the method of understanding is an understanding of the specific conditions of the parental corn seed system. It is not difficult to predict the flowering period of the corn seed production as long as they fully grasp the physiological and biological characteristics of the parents.
In the field of crop production, according to the number of leaves of the parents, three or five observation points of the representative parent and female parent are selected. Each of the points selects 10 plants as typical plants, and the regular leaves survey the parent. The number of mother's leaves. The specific method is to do a leaf label every 5 leaves (three leaf labels can be made throughout the entire growth period), and predict the speed of development based on how much the parents' leaf appears, and observe whether the parents coordinate. Under normal circumstances, if the number of leaves already present in the female parent is about two leaves more than the male parent, it can be shown that the parents can meet each other.
Leaf-splitting inspection After the parents had jointed, a representative plant was selected to peel off the leaf heart, and the number of leaves not seen was observed. The number of unfertilized days was calculated based on the number of unexposed leaves and the flowering time was predicted. If the number of parental leaves is less than the number of leaves that have not emerged from the parent, 1.5 to 2 slices, indicating that the flowering phase meets well. If you exceed it, you may not meet well.
Young Spike Differentiation test at the booting stage of jointing, selecting representative points in the maize planting field, taking 3 to 5 representative parent and female plants per point, stripping leaves, checking the size of the panicle, and analyzing the flowering period. time. If the maternal ear differentiation is earlier than the father, it means that the flowering period meets well. On the contrary, it may not happen.
According to the above-mentioned methods, the forecast of flowering period and the adjustment of the situation that may not occur during the flowering period can be adjusted accordingly. Specific methods for realizing the normal flowering period include:
We must adhere to the "mother" father's method of seed production, that is, the mother would prefer not to leave the father early.
If the cultivating root-cutting method is found in the field, the development of the male parent faster than the female parent is likely to cause the father to spend early. At this time, the mother-fat and parent-disconnected roots should be used to control the growth of the male parent and strengthen the maternal development to reach the flowering period. The purpose of meeting.
Rapid promotion method When the female parent is stunted and grows slowly, it is necessary to strengthen the management of the female parent through foliar spraying (growth regulator/fertilizer) as soon as possible, and accelerate the development of the mother, catch up with the male parent, and reach the flowering period.
In the case of normal maternity development, the lead-punching male method can be used to remove parental tassels in advance because the maternal growth period is too long and the ear growth is too slow to catch up with the male parent's flowering. When the male's tassels are outcropping or bulging, they draw males, cut off the growth points, stimulate the rapid development of the female ear, and reach the flowering period.
In the growth process of female and male parents, the parents have developed normally, but due to the tight female parent's leaves and the difficulty of spinning, it also affects the pollen encounter. At this time, it is necessary to cut the leaves manually to speed up the spinning speed and achieve a normal flowering period.
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