The flowering period is April-May, and the fruiting period is September-165438+1October. Because lemons are easy to bruise, wear gloves when picking them.
Fruits are generally harvested before ripening and can be preserved for 3 months after treatment.
Extended data:
Young tree management
soil management
Every winter in leisure season, combined with shallow ploughing and soil cultivation, 40-60 cm long and 60-80 cm deep fertilization holes 1-2 are dug outward at the drip line of the tree crown, and compost (or manure) 100kg/m2 is applied, and mixed with the soil evenly, which is beneficial to cultivating the developed absorption roots of young trees and enhancing the nutrient absorption function of trees.
Young tree shaping
The dry height of lemon is about 40-50 cm. When the grafted seedlings germinate in spring or mature in summer, pick the core at the full bud of the branch tip 40 cm above the ground to promote 4-6 new shoots to sprout at 25-40 cm to form branches. If the new shoots are not ideal and there are few branches, the buds can be smeared 1-2 times to promote the trunk to send new branches. When the branches are mature, select the strong branches from the upper part as the first main branch, leave them 20-25 cm long, cut off the top part, and use the rest as auxiliary branches.
Fertilizer and water management
Young trees-apply fertilizer 5- 10 times a year to be diligent and thin. The type of fertilizer is mainly available nitrogen fertilizer, with phosphorus fertilizer, potassium fertilizer and human and animal manure. From the germination of spring shoots in March to the emergence of autumn shoots in September, 30% decomposed human and animal manure was applied every month/kloc-0. Annual young lemon trees are usually applied with 80g of nitrogen, 40g of phosphorus and 30g of potassium every year, and the annual increase is about 10g. 2-4-year-old young trees, the fertilization period is concentrated before each shoot. Fertilize 5-6 times a year, and spray 3-4 times on the leaves at the tender branch stage.
Guo Hua management
From July to August last year, according to the age, tree vigor, fruit bearing, rainfall and other conditions of lemon trees, autumn shoots were released uniformly to form good fruiting mother branches, and at the same time, branches and leaves were protected to prevent pests and diseases such as leaf miner. After the autumn shoots of 5438+00- 1 1 are fully mature in June, the soil should be loosened and roots should be cut off moderately to control the growth of winter shoots and promote the differentiation of flower buds.
Take timely measures to protect the fruit after the lemon tree withers. 1. Young fruit stalks can be coated with 250× 10-6 gibberellin (g A3)+400× 10-6 cytokinin, or sprayed with 50× 10-6 gibberellin+Aiduo liquid medicine, or sprayed with most liquid medicine. The second is to apply fruit-stabilizing fertilizer from flower withering to fruit swelling in May, and spray 0.3% urea and 0.2% potassium dihydrogen phosphate solution on the crown.
7 days 1 time, 3 times in a row, can improve the fruit setting rate. Third, beekeeping in orchards, creating a good pollination environment is also conducive to improving the fruit setting rate. Fourth, quick-acting chemical fertilizers should not be applied in May-July, so as to reduce the sprouting of summer shoots and consume the nutrition of trees. At the same time, summer shoots should be smoothed in time to alleviate the contradiction between flower and fruit growth and new shoots. Fifth, when it rains during flowering, shake the trees in time to remove the accumulated water on the petals to prevent flower retting.
If there are too many fruits in the lemon tree, the fruits of the plants with too many fruits can be thinned in time from late June to early July after the second physiological fruit drop, so as to ensure the large size and high quality of the fruits and prevent the years. According to the principle of "sparse but not sparse, there are good and bad", sparse and decrypt the collected fruits, small fruits and deformed fruits. Leave 30-35 leaves and one fruit is appropriate.
References:
Lemon (Rutaceae citrus) _ Baidu Encyclopedia