Strong soil phosphorus fixation ability in dryland
From the point of view of improving the resistance of autumn-sown crops, after the sowing of autumn-sown crops, under the harsh conditions of harsh winter rain and low temperature, the crops are susceptible to drought and freezing, and the application of phosphate fertilizer can improve autumn. The hydration and adhesion of the cell protoplasts during the wintering period of the crops reduce the freezing point, thereby improving the cold tolerance and drought tolerance of the crops, and is conducive to the safe wintering of autumn-sown crops in winter. In addition, the winter green fertilizer for autumn planting emphasizes the application of phosphate fertilizer. Not only the legume green manure itself is a phosphorus-producing crop, but also the application of phosphate fertilizer to enhance the photosynthesis of plants, produce more carbohydrates, promote the luxuriance of stems and leaves, accumulate more substances, and It supplies the growth and reproduction of Rhizobium and enhances its nitrogen fixation.
Therefore, in the different crop rotations, although it is not necessary to apply phosphorus to each season crop, it must be considered to be applied to the cornice that can maximize the effect of phosphate fertilizer, and the autumn sowing crop is the best priority for the application of phosphate fertilizer throughout the year. Rinse mouth.
Autumn crops are mostly dry crops
Under dry farming conditions, the effectiveness of phosphorus is low. After entering the winter, the microbial activity in the soil is weak, the phosphorus capacity is small, the rate is slow, and the strength is low. Moreover, under dry farming conditions, the soil moisture tension is large, the phosphate flow and diffusion force are reduced, the phosphorus displacement is small, and the effectiveness is lower than that of rice under water conditions. 3 times. In addition, some dry crops, such as wheat crops, are originally poorly responding to phosphorus, while large and wheat require more phosphorus during the regreening and tillering stages. Therefore, the sowing season of wheat crops emphasizes phosphorus application to meet the demand for phosphorus in the critical period.
Application method should pay attention
Phosphate fertilizer should be mixed with various organic fertilizers or ammonium bicarbonate. In the autumn sowing, the application of acupoints and strips should be used as the base fertilizer. The general dosage is about 20~25 kg per mu, and the application depth is 6-10 cm. Mixing 3 to 5 kg of phosphate fertilizer with 1 times of dry fine soil, using base fertilizer and seed fertilizer, combined with shallow application and deep application, can achieve good fertilization effect.
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