How to choose the best variety for local planting

Crop varieties are genetically stable group types that have life. Different varieties of the same crop have different characteristics and regional adaptability. The length of sunshine in different regions is not the same, the temperature is not the same, the effective accumulated temperature is not the same, the length of the frost-free period is not the same, the rainfall is not the same, the soil properties and fertility are not the same, so the different varieties of crops have different regions for these external conditions. Adaptability, at the same time, in the same large natural area, due to different local climate conditions, soil properties, fertility conditions, farming systems, pests and diseases are not the same, planted crop varieties must also be adapted to local conditions, because different growth periods Variety yield increase range is not the same, generally the early maturing varieties have less potential (about 7-8%), medium-maturing varieties are worse (about 8-9%), and late-maturing varieties are higher (about 11-15%). When selecting varieties, it is necessary to understand and master the genetic characteristics of the above conditions and the varieties themselves, and to grasp the variety information, select the varieties that have been approved by the National or Provincial Crop Variety Approval Committee, and purchase the seeds with the “two certificates and one shot”, that is, The “seed license”, “seed quality certificate” issued by the seed management department and the “business license” issued by the business administration department, which have not been approved for approval or have no “three certificates,” cannot be purchased, cannot be promoted, and cannot be planted. In order to avoid counterfeiting, deception. The new varieties should be introduced in small amounts, first trials, demonstrations, successes, and promotion. In one place, one food crop is selected from a single species, and then it is matched with other varieties so that it can be matched early, middle, and late, so as to “do its best and use its best” to maximize the use of fine varieties. The increase in production. Reasons for the rational combination of varieties: First, in a region, even a township, a village, the natural conditions and cultivation patterns are always different, which requires a reasonable mix of varieties, the second is conducive to regulating the labor force, not when breaking the farm The same crop planting several different sowing dates (including rice transplanting), mature varieties, is very good for the adjustment of manpower, animal power and agricultural machinery, is conducive to timely early sowing, strengthen management, promote early maturing, timely harvest, three It is a reasonable mix of varieties that can reduce the losses caused by natural disasters. At this stage, human resources cannot control the climate, do not completely prevent pests and diseases, and cannot completely overcome natural disasters. If varieties are single, they can sometimes cause serious losses. A reasonable mix of varieties can reduce these losses. After the varieties have been established, they must be relatively stable and should not be changed frequently. This will help to grasp the characteristics of varieties and cultivation methods, and to obtain high yields, stable yields, high yields, and good harvests. (Source: Rural Practical Science and Technology Information Sun Yansheng Jiao Lei)

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