Attention to the Application of rare Earth Fertilizer in Walnut Orchard

The content of rare earth elements in    plants is very low, and the contents of different organs vary greatly, and the general distribution is as follows: root > stem > leaf > flower > fruit and seed. About 80% of rare earth elements absorbed by plants are concentrated in the root. The application of rare earth fertilizer to walnut trees can promote the absorption of nitrogen, phosphorus, potassium and calcium, magnesium, iron and zinc by roots, increase the content of nitrogen, phosphorus and potassium in leaves, and reduce and avoid element deficiency. Rare earth fertilizer can promote nitrogen metabolism in plant leaves, increase chlorophyll content in leaf tissue, enhance photosynthetic intensity, promote tree growth, and significantly reduce leaf water evaporation and transpiration intensity, so as to improve the drought resistance of walnut trees. Therefore, the effect of applying rare earth micro-fertilizer to orchards in arid and semi-arid areas or orchards with poor irrigation conditions is very obvious.

The application of rare earth microfertilizer to    walnut trees can promote the balanced absorption of nutrient elements by roots, ensure the healthy growth of walnut trees, and improve the stress resistance and drug resistance of walnut trees. Promote seed germination and improve the survival rate of planting. Promote tree growth and development, increase fruit setting rate, increase yield and improve fruit quality.

   1. When diluting rare earth micro-fertilizer, apply clean water of pH5~6. Rare earth micro-fertilizer is insoluble in alkaline solution and hard water, and it is easy to precipitate, so it can not be mixed with alkaline fertilizer. In the preparation, the pH of water was adjusted to 5: 6 with nitric acid or acetic acid, and the yield-increasing effect was more obvious when rare earth micro-fertilizer was combined with boron, ethephon, Yemanbao and other hormones or foliar fertilizer of suitable concentration. However, rare earth micro-fertilizer can not replace organic fertilizer or inorganic fertilizer, only under the condition of sufficient nutrients, the application of rare earth micro-fertilizer can improve fertilizer efficiency. Application must be combined with other fertilizers. Because rare earth micro-fertilizer can promote the absorption of nutrients by plants, but can not provide nutrients. Therefore, one day before and after the application of rare earths, fertilizer should be applied once.

   2. The application method and period of rare earth micronutrient fertilizer aqueous solution should be mixed now. Foliar spraying, soil ditch application, soaking rootstock, rattan root or seed dressing can be used, and cuttings can also be soaked or grafted. Generally foliar spraying is appropriate, choose no wind or breeze sunny day before 10:00 or after 4 pm spray. If it rains within 2 hours after spraying, spray it again. Application period: young trees were sprayed with 0.03% ~ 0.05% rare earth fertilizer solution before and after the Beginning of Spring, the Beginning of Summer and the Beginning of Autumn respectively; fruiting trees were sprayed with 0. 0% at the initial flowering stage and at the young fruit stage. 0 5% 0. 0. The aqueous solution of rare earth micro-fertilizer with the same concentration of 1% can increase the yield by about 26%.

   3. The application concentration of rare earth micro-fertilizer solution should be prepared in strict accordance with the operating instructions, or the best concentration should be determined through experiments. The application of rare earth micro-fertilizer beyond the critical concentration will inhibit the mineral absorption and tree growth and development, and with the increase of liquid level, the fertilizer damage will be aggravated, serious will burn petals, leaves and young shoots, and even cause branches to die in the following year. High concentration of rare earth fertilizer will also reduce the stress resistance and disease resistance of the plant.

   4. Matters needing attention in the application of rare earth micro-fertilizer to fruit trees the application of rare earth micro-fertilizer should consider the soil conditions and the ratio of commonly used fertilizer. Rare earth can not be mixed with potassium dihydrogen phosphate, otherwise it is easy to form precipitates and can not be absorbed by plants. Rare earth micro-fertilizer should not be filled with iron, aluminum and other metal utensils, but wooden buckets, plastic and enamel containers can be used when mixing and soaking seeds. The remaining seeds after sowing cannot be eaten or used as fodder. Avoid co-application with ammonia, ammonium salt, carbonate, phosphate and other co-precipitates; do not leave it for too long; avoid strong wind, heavy rain, sun exposure, etc. A large number of experiments show that the effect of applying rare earth is better in the areas with low available content, and the effect is better on the basis of proper application of nitrogen, phosphorus and potassium fertilizer. High concentration of rare earth fertilizer can also inhibit growth. The pH of the prepared rare earth microfertilizer solution is best adjusted at 6. 0-6. 2 Excessive acid will cause damage to plant leaves, while excessive alkali will cause precipitation in the solution.