How to apply mulberry leaf fertilizer

From March to April this year, the weather was affected twice by the low temperature "cold spring". The mulberry trees were frozen, the mulberry buds were partially frozen, and the mulberry germination was delayed. According to the survey, the germination of mulberry trees in the mountainous areas of southern Anhui has been postponed for 10 to 12 days, and the spring silkworms have been postponed for about a week. To this end, in order to ensure that the leaves of spring silkworms are not lacking, all localities should guide silkworm farmers to carry out 1 to 3 times of mulberry leaf top dressing. Foliar topdressing is a method of spraying water-soluble fertilizer liquid on mulberry leaves during the growth of mulberry trees, absorbing nutrients from leaves, and improving the yield and quality of mulberry leaves. It has the characteristics of absorption, quick effect and high fertilizer efficiency. .

Specific method: It should start 20 to 25 days before the leaves of the large silkworms, and stop spraying one week before the leaves. Spraying time to choose sunny morning morning dew after drying or evening is good, the spraying part is mainly on the back of the leaves and young leaves, because the absorption rate of nutrients on the back of young leaves and leaves is much higher than that of the old leaves and leaves.

Spray a mixture of urea (0.5%), potassium dihydrogen phosphate (0.2%) or urea (0.5%) and superphosphate (0.5-1%) evenly on the back of the upper middle blade to spray The leaves just drip for a degree, spray 2 to 3 barrels per mu, 3 to 5 days once, 2 to 3 times to see the leaves deepen. At the same time, combined with the mulberry tree topping in the fourth age of silkworms, to improve the yield and quality of mulberry leaves, and to ensure the production of spring silkworm leaves.

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