After the wheat began to divide, the number of tillers increased with the growth and development of the plants, and the total number of stems reached the maximum before and after jointing. Since then, the late tillers have died due to lack of nutrients, etc., and the number of stems after heading is basically stable. Generally, after tillering, the main stems and large tillers are firstly supplied with nutrients. After the first green leaves appear, nutrients are produced. At the same time, the nutrients are supplied by the big tillers and the main stems, and finally the nutrients are absorbed and produced by themselves. Normally, it is possible to have ears by having more than three functional leaves and independent roots when the wheat begins to joint. When the density of the field is too large, the large number of leaves with more than three leaves at the jointing stage of the wheat often cannot be spiked. In the end, the tillers that cannot be spiked are all invalid.
The occurrence of tillering in wheat and the main stem and leaf age maintained n-3, that is, when the main stem was 3 leaves, the buds of the buds occurred, the first leaves of the main stems were divided into four leaves, and the tillers of the buds of the main stems were 5 The branching and the second leaf section of the main stem occur. The management of wheat tillering stage is to promote root growth, foster early growth and strong seedlings, ensure the safe wintering of wheat seedlings, and lay the foundation for the full ear and big ear. The wheat in the above-mentioned field has just started to divide, the wheat seedlings are weak, and the number of seedlings is not much. At this time, sufficient fertilizer is provided, which can promote the rapid growth of tillers, increase the tillering rate and promote the differentiation of young ears. If the fertilizer is insufficient at this time, the wheat seedlings may be thinner and less tiller, resulting in an increase in ineffective tillers in winter, less effective panicles, and lower yield.
The soil drought in the previous period should be managed according to the amount of fertilizer in the previous period and the change of soil moisture. In the field of base fertilizer and early soil drought, when the soil moisture increases after the recent rain, the wheat seedlings can absorb nutrients more, and there is no need to rush to fertilize. Fields with insufficient seedlings should be fertilized early. Generally, 10 kg of urea per acre or 20 to 25 kg of ammonium bicarbonate and 5 kg of potassium chloride are applied. Pay attention to irrigation and drought, and promote the growth of wheat seedlings. Combined with fertilization, the method of furrow irrigation is used to fill the two-thirds of the depth of the ditch, so that the water penetrates into the soil and prevents flooding and long-term accumulation of water in the field.
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