Wheat is one of the crops requiring a large amount of fertilizer, and its yield level has a greater relationship with the level of fertilization. In order to ensure that wheat has a sufficient number of panicles and a reasonable structure of panicles, "three fats" should be applied.
Early application of seedlings in wheat ear-grain structure, the number of effective panicles has the greatest impact on wheat yield. To ensure that wheat has sufficient effective panicles, it is important to promote early delivery in terms of field management measures. The higher temperature in early winter and the better light conditions are the main periods for effective tillering in wheat. It is necessary to effectively grasp the favorable period in the early winter and promote the delivery by early application of Miaofei. Early application of Miaomiao is an important measure to promote the early growth of low-level delivery of wheat, increase the percentage of tillers and spikes, and promote the differentiation of young ears. If you ignore the application of wheat seedlings, it will lead to thin wheat seedlings before winter, lack of tillers, more invalid tillers after winter, fewer effective panicles, and low yield. It is required that the wheat seedlings grow to the 2 leaf 1 heart stage and the seedlings should be topdressed early. Every 667 square meters uses 10 kg of urea or 20 kg to 25 kg of ammonium bicarbonate, and 5 kg of potassium fertilizer is applied to the water. If dry weather occurs at the beginning of winter, it is necessary to pay attention to irrigation drought to promote the growth of wheat seedlings. Combining fertilization with furrow irrigation, water is poured into the depth of 2/3 of the ditch to allow water to penetrate and infiltrate the soil, preventing flooding and long irrigation.
Steady application of manure fertilizer This fertilization has a significant effect on improving tiller success rate. According to the test, Yangmai 158 applied fertilizer to cover crops, and the effective ear ratio per 667 square meters did not increase 35,000 spikes without applying fertilizer; the yield per 667 square meters was 31.2 kg higher than that of unprotected manure. When the wheat grows up to 6 leaves and 1 heart, depending on the seedlings, the application of urea is usually 4 kg to 5 kg per 667 square meters. For weak seedlings, the top dressing is 6 kg per 667 square meters. The fertilizer should be applied in a timely manner, and the application amount should be strictly controlled to prevent late delivery or excessive use of the fertilizer causing late delivery and ineffective delivery. Excessive seedlings are not to be used to protect the manure, and measures must be taken to control the seedlings to prevent over-concentration and cause too much shade in the field. For shade seedlings, 0.5% urea plus 0.3% potassium dihydrogen phosphate solution can be sprayed on the leaves to quickly supplement the fertilizer.
According to the seedlings, the drug was applied to the diarrhea. According to the test, Yangmai 158 was applied to separate fertilizers, and the number of grains per panicle was 4.2 more than that of no fertilizer and 15.6 kg per 667 square meters. Therefore, it is an important measure to fight the big spike. In the tip stage of wheat flag leaf, depending on the seedling condition, the fertilizer can be applied to prevent the degradation of spikelets. Medium-sized wheat seedlings, topdressing urea 2.5 kg to 3.0 kg per 667 square meters, weak seedlings per 667 square meters topdressing urea 4 kg to 5 kg, for Wang Miao should control the application to prevent the greed green lodging.
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