Dryland wheat balanced fertilization technology

The main limiting factor for increasing wheat yield in dryland is the problem of soil fertility. The application of organic manure and nitrogen and phosphate fertilizers can effectively fertilize fertility and increase wheat yield. Based on the experience of comprehensive production practices, dryland wheat fertilization should master the following technical points:

First, the application of organic manure combined with inorganic fertilizer application of dry manure organic fertilizer can increase soil nutrient supply, but also improve the physical and chemical properties of the soil, is conducive to the improvement of soil water storage. However, organic fertilizers have low nutrient content and weak fertility. With the increase of wheat yield, they cannot meet the requirement of high yields. Therefore, it is necessary to increase the availability of quick-release fertilizers to ensure the supply of nutrients, replace organics with organics, and expand the recycling base of organic materials, thus rapidly increasing Fertility, increase production.

Second, nitrogen and phosphorus fertilizers were combined with the application of polyphosphorus deficiency in dry lands. Generally, the yield increase of phosphate fertilizers was greater than that of nitrogen fertilizers. Moreover, the combined use of nitrogen and phosphate fertilizers had a significant interaction effect. Therefore, dryland wheat fertilization must be combined with nitrogen and phosphate fertilizers, and increase the proportion of phosphorus fertilizer. The ratio of nitrogen to phosphorus is generally 1:1. If urea and superphosphate are counted, each kilogram of urea is applied with 4 kg of superphosphate.

Third, the use of "one shelled" fertilization method Dryland wheat because of no watering conditions, top dressing effect is poor. All fertilizers, including organic fertilizers, nitrogen fertilizers, phosphate fertilizers, and potash fertilizers, can be applied as base fertilizers in farmland at one time. The depth of fertilizer application is generally controlled at about 30 cm. According to practice, it is found that dryland wheat uses all fertilizers as base fertilizer for one-time application, which is better than later-stage dressing. However, before the winter wheat seedlings may show a prolonged trend, attention should be paid to controlling the pre-winter wheat population.

4. Reserve fertilization In low-yield wheat fields in drylands, dry lands with thick soil layers all year are within a larger range of fertilizers, and wheat yields will increase with the increase of fertilizers. Therefore, in order to improve soil fertility, in addition to meeting the growing needs of wheat in the current season, the fertilized materials should also provide a surplus in soil nutrients; new fertile materials should be used as much as possible, especially phosphate fertilizers, and the fertility should be appropriately reduced after the fertility is raised. To reduce costs.

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