Fertilize soil or land
Zhuang huafei
For the first time, from late February to early March, when the ear length reached 10- 12 cm, 0.2 kg of potassium sulfate and 0.2 kg of dry cake fertilizer were applied to each plant based on 25 kg of fruit per plant. If the tree is vigorous and has no fertilizer effect, no fertilizer can be applied this time: the second time, before the flowering period when the pure ear has differentiated and most buds are full, and the ear is no longer in danger of "grabbing the top", the general year is from late March to early April, and most organic fertilizers are applied during this period. According to the plant yield of 25 kg, cake fertilizer 1.5 kg or chicken manure 5 kg, potassium sulfate 0.4 kg, calcium phosphate fertilizer 0.5 kg and urea 0. 1 kg were applied to each plant.
Qiangli fruit fertilizer
From mid-May to early June, the first physiological fruit drop is over, and fertilization is applied before the second physiological fruit drop begins (that is, when small-fruit soybeans are big). This fat depends on whether there is fruit or not, and how many fruits are hung. According to the yield of 25 kg per plant, compound fertilizer 1 kg, potassium sulfate 0.3 kg, urea 0.3 kg and calcium phosphate fertilizer 0.25 kg are applied to each plant.
foliage dressing
During the 40 days from early February to early March, compound nucleotides are usually sprayed with potassium dihydrogen phosphate and boron. Spraying foliar fertilizer every 15-20 days in May and June, adding potassium dihydrogen phosphate, magnesium sulfate and zinc sulfate, and spraying with water.
Drainage and irrigation
When there is too much rain during the fruit development period, attention should be paid to eliminating stagnant water in time, and irrigation and moisturizing should be done in time in case of drought to ensure the normal development of fruit.
blossom and fruit thinning
Generally, flower thinning is carried out in mid-March, just after the ear development is completed and before flowering; From late May to early June, when the small fruit grows to the size of soybean, the fruit becomes thinner. The specific methods and requirements are:
Sparse diseased panicles, weak panicles and poor growth panicles, keep healthy panicles, reduce unnecessary nutrient consumption and improve fruit setting rate;
The top of the crown is sparse, and the middle and lower parts are sparse, so as to prevent the top of the crown from reaching the top due to excessive fruit hanging, which leads to direct exposure to the trunk in summer and weakens the tree potential;
Go outside and live inside, go to the Lord and live in the vice, and live in the fold. In other words, more flowers and fruits are sparse outside the crown, and more flowers and fruits are reserved in the crown. When there are two or more spikes on the same branch, the main spike is sparse and the secondary spike remains, or the upper spike is sparse and the lower spike is short and strong.
When thinning fruit, thin the ear with few fruit sets, and keep the ear with many and compact fruit sets. However, if there are too many fruits per panicle, some lateral panicles should be properly thinned and the amount of fruit per panicle should be appropriately reduced.
Matters needing attention
Young tree management should pay attention to intercropping and covering, reaming and soil improvement, timely fertilization and reasonable shaping and pruning to form a good tree shape and cultivate strong backbone branches. Adult trees focus on fattening, soil cultivation, farming, irrigation and pruning.