6 Flowering forecast and adjustment 6.1 Flowering forecast Hybrid corn seed production at different growth stages should use different methods to predict the flowering period, from the jointing stage to the big bell-mouth stage to predict the leaf age, and observe at the fixed point in the field. Usually when the female parent has more leaves than the paternal parent, 2-3 flowering stages meet well. Large bell-mouth period using stripping method, when the father has no more leaves than the female parent 1.5 ~ 2.0 when the flowering period meets well; from the panicle differentiation period began by comparing the size of the parental tassel to predict the flowering period, when the mother tassel is The flowering period of the paternal tassel was 2 to 3 times good. 6.2 Flowering Regulation For example, when it is found that the flowering period meets the difficulties during the big bell mouth period, the excessively fast growing parents are extensively managed, and the slow growing water is treated with partial water partial fertilizer to promote its rapid growth. Before the tasseling, two or three sprays of the slow-developing parent potassium dihydrogen phosphate and urea (1:1) plus a mixture of 150-200 kg of water were used to make the father loose powder three days in advance and the female spit early three days. When the male father finds out that the father is early, the female parent can take one or two leaves to draw males, so that the nutrients can be concentrated on the ear. This allows the mother to spit 2-3 days earlier; In the early days, the filaments of the female ear were cut 2 to 3 cm to prevent the filaments from covering each other and increase the seed setting rate. When the female parent had slower silking, the ears of the ear were cut 2 to 3 cm to promote silking in advance. 7 strictly to miscellaneous To remove miscellaneous items, one should master the principle of less thoroughness. It is generally advisable to organize two or three times comprehensive decontamination during the entire production process. This will not only be conducive to carrying out work but also improve miscellaneous quality. During the seedling stage, under the guidance of the technicians, the hybrid seedlings that do not meet the characteristics of the parents are removed. In the 10 days before the tasseling, the technicians led the team and each household checked one block to remove the miscellaneous strains. When harvesting and drying, farmers are required to find that the ear of the mixed fruit is picked out in time to ensure the seed quality. 8 touches the leaves to advance Artificial detasseling is the central link in the seed production and is the key to ensuring seed purity. At present, due to the lack of timely or improper method of detasseling, the high self-interest rate of the female parent is the main reason for the low purity of the seed. The implementation of a swift and irresponsible advancement is an effective means to solve this problem. It not only can effectively prevent female parents from self-pollination, but also has a simple method, saves labor and money, is conducive to regulating nutrient supply, promotes ear growth, and increases seed production. Yield. The test results showed that the detasseling of the lead zone with one or two leaves increased 5%~10% compared with the conventional leaves. Therefore, it is a powerful measure to reduce plant nutrient consumption and increase seed production and seed quality. 9 Timely removal of the father The timely removal of the paternity after pollination can improve the ventilation and light transmission conditions in the field, which will help increase the utilization of light energy and increase the output of the female parent. At the same time, it will reduce the humidity in the field and reduce the occurrence and harm of diseases and insect pests. Avoid seed mixing during harvest to ensure seed quality. 10 harvest drying Self-Aligning Ball Bearing Self-aligning Ball Bearing, Self Aligning Ball Bearings Ningbo Borine Machinery Co.,Ltd. , https://www.borine-agroparts.com
Several Key Techniques to Be Noted in Hybrid Maize Seed Production 2
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