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Crop selection techniques for autumn crops
"Choose a good planting species, one ridge and two ridges." "Good planting good seedlings, good calabash knot good scoop." Improved varieties are one of the important factors for crop yield increase. Generally, the yield increase of up to 15% of mu can be achieved, and some of them are even higher. The state seed sector can not meet the needs of improved varieties of farmers due to the constraints of provenance and transport conditions. For conventional seed or household varieties, farmers can choose their own seeds and seeds. The advantage of this is that not only can the contradiction of lack of provenance be alleviated, but also the species can be prevented from being mixed and degraded, the use of counterfeit seeds can be avoided, the seed quality can be improved, and conservation can be purchased. cost. In the autumn, when various crops mature gradually, it is a good time to retain various seeds of crops. They must not miss the opportunity, and they will no longer come. Therefore, seizing favorable opportunities and choosing the seeds for good crops are all very important. Select the standard to stay 1, the straw is neat, the same height, strong and not lodging. 2, full grain, thousands, 100-grain weight. 3, no pests, uniform color. 4, high yield, good quality and good quality. 5, strong adaptability, good resistance. The method of selecting seedlings is to eliminate miscellaneous and inferior seed selection methods. Before the harvest of wheat, rice and other crops, choose high-purity plots, block selection or chip selection, according to the typical characteristics of this species, such as grain color, grain shape, ear shape, plant height, will not meet the typical varieties The traits of miscellaneous plants, poor growth and diseased worms are removed, and then harvested, single-stranded, single-stranded, single-sun, single-stocked, and prevented from mixing. Seeds selected by field plots or tablets can generally increase production by about 15%. The purity can reach more than 98%. . 2, strain selection method. Such as soybeans, rice and other crops, can be selected for planting or panicle selection, the spring to establish a plot of land to stay in the field, can be selected for planting or panicle selection, election stay, select healthy and not lodging, full grain, pest-free plants or Spike, and remove the miscellaneous strains, diseased plants, weak strains, single plant, single ear sowing, can increase production by about 35%. 3. Positioning and selection methods. Due to physiological positional effects of plant nutrient supply, seed quality is different at different fertility sites. Appropriate planting sites for different crops are as follows: corn is the middle and lower part of the ear; wheat is the middle and upper part of the ear; rice is the middle and upper part of the main stem; soybean is the dominant crop in the middle, and it has limited breeding habits and the strongest genetic advantage. It is in the middle and upper part of the stem. The variety of indeterminate knot habits is in the lower part of the stem, and the species with limited knot habits are mostly in the middle state. The seeds are selected in the strong genetic advantage area of ​​the plant, and the seeds of the most suitable part are reserved and the yield is generally increased. The amplitude is 15%-20%. .4, grain selection method. Through the grain selection, not only can effectively remove all kinds of abnormal grains and increase the purity of seeds, but also can choose seeds that remain full, robust and free from pests and diseases. Grain selection can significantly increase the germination rate and germination potential of seeds. The methods of grain selection include wind-selection, screening, and mud-water selection, and seeds of uniform color and shape, uniform size, fullness, and no pests and diseases should be selected. Focus on matters 1. Select seeds for autumn, only limited to self-crossed crops, hybrid crops should not choose to retain seeds. 2. Prevent miscellaneous, single species selection, threshing, storage, and prevent miscellaneous to ensure the purity of seeds. 3. Take practical measures to reduce the moisture of the seeds in every possible way so that the seeds can be safely stored for winter.