The reason why walnut does not turn out
Non-variety cultivation: Walnut trees planted with planting seeds are called seedlings, and there is no grafting of superior varieties on seedlings. If you do not choose the walnut seeds used, the walnut trees that grow out are very different, and the advantages and disadvantages are uneven. Some results are late, and the fruits are only seen after 10 years of planting.
Poor site conditions: Walnut trees are planted in poor conditions, with thin soil layers, poor soil, and any tree growth without management, resulting in long-term tree nutrient deficiency, weak branches, no flower buds, and no results.
Improper management: First, too much nitrogen fertilizer and no water shortage make the tree prosperous, the branches are dense and dense, and the ventilation and light transmission conditions are poor. Second, for the crops under the tree, the lower branches of the walnut canopy were all trimmed. The whole canopy had too few branches and mostly long branches. The posture was upright, and the strength of the tree was strong and weak.
Poor pollination: Walnut is a wind-pollinated tree species. The hermaphrodite is the same plant, but the female and male flowering periods of most varieties are inconsistent, and there are no other results in the walnut orchard nearby, resulting in poor pollination and few results.
Diseases and insect pests are serious: Walnut trees are affected by pests and diseases will affect growth and results. Like flower bud maggots, which exclusively eat the female flowers of the pecan tree, there is no old fruit.
How to promote premature walnut yield
Grafting excellent seedlings: excellent walnut varieties like Xiangxiangling, thin shell etc. have early fruits, early yield and excellent quality. Strong resistance. Uniform planting of good-grain grafted seedlings can achieve the purpose of early fruit, high yield and neat results.
Artificially assisted pollination: In order to overcome the problems of pollination and fruit setting in different stages of the opening of female and male flowers, artificially assisted pollination can increase the fruit setting rate. The suitable pollination period is when the stigma of the female flower is opened with "inverted eight characters". At this time, the male inflorescences of the first big tree can be collected and hung above the pollinated tree to let it fall naturally. You can also collect pollen and dilute it 3 to 5 times with talcum powder and put it in a three-layer gauze bag to artificially shake the pollinated tree. Pollination should be done from 9 to 10 am on a sunny day.
Fine management: fertilization and watering, for the Wang tree, increase the application of phosphorus and potassium fertilizers, control the amount of nitrogen fertilizer and irrigation, apply the basic fertilizer early, combined with the deep rooting, promote the tree from strong to strong. For weak trees, more organic fertilizer should be applied, more top dressing and foliar spray fertilizer to strengthen vegetative growth and rejuvenate the tree vigor. Insect pests of walnut mainly include the moth-lifting moth which damages the fruit and the longicorn beetle which harms the branches. The main diseases include walnut ulcer disease. Diseases and insect pests should be comprehensively controlled, strengthen management to enhance tree vigor and disease resistance, and drug prevention and control should strengthen the prediction and forecast of pests and diseases, and hit key medicines when pests and diseases are not in danger.
Disclaimer: Some articles of this website are transferred from the Internet. If the legal rights of third parties are involved, please inform this website for processing. phone
Safety Green Sweater,Safety Orange Sweater,Reflective Safety Sweaters,High Vis Cardigan
Ningbo Staneex Imp. & Exp. Co., Ltd. , https://www.staneex.com