Crop selection in autumn

In the autumn, various crops have matured one after another. It is a good time to choose to leave crop seeds. As the saying goes: “Good melons produce good scoops and good seedlings.” This fully shows that selecting and keeping good seeds will play an important role in seizing the agricultural harvest in the coming year. First, choose the criteria for keeping crop seeds. To retain the seeds of agricultural crops must meet the following conditions: 1. Straw stalks are neat and stout. 2, large spikes, grain full. 3, the same color, no pests and diseases. 4, high yield stability, good quality. Second, crop selection methods. 1. The selection of the block selection, the establishment of plots left for farming in the spring, and block selection or chip selection. When choosing to stay, remove the miscellaneous strains, diseased strains, and weak strains, and then mix and select them for planting. 2, stable selection. Prior to the autumn harvest, plant selection and panning were carried out on plots that were planned to be planted. For strain selection and panicle selection, we must first comprehensively understand the characteristics of the variety, and then choose to maintain a single plant and single ear with robust growth, strong resistance, and large panicles. 3, positioning is preferred. That is, seed selection is based on the best genetic advantage of the crop. Also called positioning selection. Positioning and seed selection can fully transfer the excellent performance of the variety to the next generation, and fully and effectively exert the improved yield performance of improved varieties. The best genetic advantage of several crops is: Corn: It is the dominant crop in the center, and its best genetic advantage is in the middle and lower part of the ear, and the seeds used for this species are used for seed production, which is 35.4% higher than that at the top. Sorghum: is the top In the dominant crops, the grains in the upper part of the ear were full and full, well developed, and strong in growth. They had strong genetic advantages for the traits of high yield and yield. The use of seeds with more than 1/3 of total spikes as a seed was 8.7% higher than that of seeds with mixed whole ears. Rice: It is a dominant crop at the top. The upper part of the panicle is full and full of grains. The weight of one thousand grains is high, and the growth ability is strong. The use of seeds of the upper genus for seed production increased 13.2% and 17.4%, respectively, with the middle and lower seeds. Soybean: It is a dominant crop in the central region and has a limited breeding habit. The strongest genetic advantage is in the middle and upper parts of the stem. The indeterminate and uncultivated variety is in the middle and lower parts of the stem. The limited-cultivation varieties mostly show intermediate states. Plant selection in the strong genetic predominance can generally increase production by about 10%. Third, the selection of attention. 1, the autumn seed selection is limited to self-crop crops, hybrid crops should not choose to retain the seeds. 2. After selecting the seeds, we must pay attention to drying and dehydration, so that the seed moisture falls within the safe moisture range so that the seeds can be safely stored for winter. China Agricultural Network Editor

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