Field Management Techniques for Pollution-Free Mango Cultivation
(1) Soil management:
In combination with the application of base fertilizer, dig a trench on each side of the tree canopy below the drip line. The standard trench size is 100 cm×50 cm×40 cm, and green manure, decomposed organic fertilizer and phosphate fertilizer are pressed into it.
It is recommended to interplant dwarf leguminous green manure, forage grass, other nectar source plants or grow grass between the rows of the mango orchard, but the intercrops should be at least 1 m from the base of the mango trees. The grass species selected should be short-stemmed or creeping, share no common pests or diseases with mango, and have a short growth period, such as Ageratum conyzoides (goatweed). It is recommended that the root zone or planting strip of mango be covered year-round.
(2) Weeding:
Weeds in the root zone should be controlled by manual, mechanical or microbial herbicides, and weeds between the rows are recommended to be controlled with mechanical, electrical, microbial herbicides or the chemical herbicides recommended in this standard.
(3) Water management:
During the autumn shoot emergence stage, flower bud morphological differentiation stage, and the early and middle stages of fruit development of mango, irrigation should be carried out promptly when the soil is dry. Irrigation once every 15-20 days is recommended.
(4) Fertilization:
The fertilizer types recommended for use are as follows. Nitrate nitrogen fertilizer should not be used.
The fertilizer types recommended for pollution-free food mango production are as follows.
Commercial fertilizer category:
Inorganic fertilizer (nitrogen fertilizer): urea, aluminium chloride.
Inorganic fertilizer (phosphate fertilizer): superphosphate, calcium magnesium phosphate fertilizer, phosphate rock powder.
Inorganic fertilizer (potassium fertilizer): potassium chloride, potassium sulphate.
Inorganic fertilizer (calcium fertilizer): quicklime, limestone, dolomite powder.
Inorganic fertilizer (magnesium fertilizer): calcium magnesium phosphate fertilizer.
Inorganic fertilizer (compound fertilizer): binary and ternary compound fertilizers.
Foliar fertilizer (growth aid category): Qingfeng Kede, brassinolide, Wandefu, Lüfengbao, Aiduoshou, Damu Fengshou, Shi'erdef, Yunda, 2116, Aopu'er, Gaomeishi, Huimanfeng, etc.
Foliar fertilizer (trace element category): fertilizers formulated with trace elements such as copper, iron, manganese, zinc, boron and molybdenum, together with potassium dihydrogen phosphate, urea, potassium chloride, etc.
Other fertilizer category:
Sea fertilizer: preservative-free fish residue, shrimp residue, shellfish residues, etc.
Animal miscellaneous fertilizer: preservative-free cattle and sheep wool waste, bone meal, livestock processing waste, etc.
Foliar fertilizer can be applied 2-3 times each during the autumn shoot greening stage, flower bud stage and young fruit development stage, with an interval of 7-10 days. The foliar fertilizer types are as described above.