Mulberry is a perennial plant. The mulberry leaves and pruning are harvested several times a year. The mulberry trees take a lot of nutrients from the soil. If they are not replenished in time, the soil nutrients will be lacking, which will affect the normal growth of mulberry trees, which will lead to the decline of the tree.

 

First, the fertilizer characteristics and fertilization amount of fertilizer required for mulberry, mainly nitrogen, phosphorus, potassium fertilizer, nitrogen, phosphorus, potassium combined application can improve the yield quality of mulberry. For every 100 kilograms of leaves produced by mulberry trees , about 2 kilograms of pure nitrogen should be added . In general, the ratio of NPK needs to be used for mulberry ( N : P2O5 : K2O ), and the silkworm mulberry garden is roughly 10 : 4 : 5 . The mulberry garden is 10 : 6 : 8 . Annual output of about 2000 kg mulberry mulberry middle level, required Mushi manure 2000--3000 kilograms, N 40 kilograms, 16 kilograms of P2O5, K2O 20 kg.

 

Second, the fertilization period and the proportion of mulberry fertilization are mainly based on rhizosphere fertilization, supplemented by root dressing.

 

( 1 ) Winter fertilizer: Winter fertilizer should be mainly composed of compost, manure, soil and other organic fertilizers, ranging from 2000 to 3000 kg per mu , with 30 kg of compound fertilizer .

 

( 2 ) Germination: When the mulberry bud grows to 2 to 3 leaves, it is applied. 50 mu of decomposed manure water , 15 kg of urea or 25 kg of compound fertilizer .

 

( 3 ) Making mulberry and fertilizing mulberry and fertilizing is to apply once every leaf and apply fertilizer once, mainly to quick-acting fertilizer, and apply 15 kg of urea or 50 ton of manure water in acre. In the case of ensuring mulberry production and fertilizer, organic fertilizer should be added once after summer harvest.

 

Third, the fertilization method ( 1 ) ditch application in the mulberry tree line ditch fertilization, generally used for dense planting mulberry garden. The depth of the groove generally is within 15 - 20 cm. Cover the soil after fertilization.

 

( 2 ) The hole is applied to the mulberry plant to open a hole for fertilization. The size of the hole should be determined according to the type of fertilizer, the amount of fertilization and the size of the mulberry tree. The tree has a small amount of fertilization, and the opening point should be small and shallow; the tree has a large amount of fertilization, and the opening point should be large and deep. Each time the hole is opened, the position should be changed to facilitate the balanced development of the roots of the mulberry tree. Cover the soil after fertilization.

 

( 3 ) Spreading the fertilizer evenly on the ground of the mulberry garden, and then turning the fertilizer into the soil through cultivating. Generally combined with winter tillage and spring tillage.

 

( 4 ) External fertilization in the mulberry leaf vigorous growth period with 0.1% urea + 0.2% potassium dihydrogen potassium mixed solution, spray mulberry leaves in the evening or cloudy, the back, spray every 5 to 6 days, in the dry season The number of sprays can be increased as appropriate.

 

● In order to make the fertilization scheme of your field more precise, it is recommended that you collect the mixed soil sample of the plough layer, send it to the local soil testing and fertilization service point, and determine the soil nutrient, and then give the soil testing formula fertilization recommendation card by the computer fertilization system.