Postharvest management of shed nectar
First, avoid rushing to remove the shed film after harvest. If the film is taken off too soon, it can lead to yellowing of the leaves. The plants should be gradually transitioned back to open ground growth. However, removing the film immediately after harvest may cause physiological stress in peach trees, resulting in leaf yellowing. In some cases, when the shed film was removed right after harvesting, only the plants near the shed exit remained healthy, while others showed varying degrees of yellowing. Fortunately, these plants usually recovered within three months. Severe yellowing can hinder normal plant growth, reduce flower bud quality, and lower the tree's nutrient reserves, which can lead to reduced fruit production the following year. To prevent this, it’s recommended to first ventilate the shed for 3–5 days before removing the film entirely. This allows the plants further away from the exit to adjust gradually, reducing the risk of shock. Second, when performing branch renewal pruning, it’s important not to confuse the results of the mother branches with the new ones. After years of growth, the leaves on the mother branches tend to age, and the number of flower buds they produce decreases over time. Additionally, if the mother branches continue to grow unchecked, it can lead to poor air circulation and a dense canopy. Therefore, it’s necessary to prune and renew the mother branches to encourage the growth of new fruit-bearing branches. Some growers mistakenly cut the result branches too short (less than 5–10 cm), leading to rapid relocation of the fruiting area and an unbalanced canopy, which is not ideal for tree development. When updating the result branches, it’s generally advised to leave about 1 cm of the original fruiting part. Not all mother branches need to be cut short—new shoots that are less than 30 cm long should be kept. Each tree should have 2–3 of these retained branches to help the tree recover quickly and rebuild its canopy effectively. Third, during pruning, don’t forget to control the vigorous growth at the top of the tree. After a short cut, the tree tends to grow more vigorously, which can lead to a "hat" shape. This can block light from reaching the inner and lower parts of the canopy, making it difficult for new branches to develop properly. These newly pruned branches often struggle due to insufficient light and may even die. When performing pruning, it’s essential to manage the competing branches and dense growth at the top. These should be trimmed regularly, ideally every 20 days or so, to ensure the central leader continues to grow straight and strong. At the same time, if there are too many branches on the lower and middle parts of the trunk, they can help suppress excessive growth at the top, maintaining a balanced structure. Fourth, avoid applying excessive fertilizer, especially after digging trenches post-harvest. Large roots should not be damaged during fertilization. Instead, organic fertilizer should be applied and followed by irrigation to promote shoot tip and leaf development. In recent years, improper fertilization in greenhouse-grown nectarines has led to root damage and poor plant health after the sheds are removed. Overly deep or large-scale root excavation can interfere with the tree’s ability to absorb nutrients, causing leaf drop, wilting of new shoots, and overall stunted growth. Fertilization should be done carefully, based on the tree’s condition, with attention to depth and amount to minimize root injury. Fifth, ensure there is no water accumulation under the shed. Before the rainy season, dig drainage ditches around the structure to prevent waterlogging. After rain, apply a systemic fungicide to reduce the risk of disease caused by high soil moisture. Proper drainage and timely treatment are essential for maintaining a healthy growing environment for the trees. Omega-3 Fish Oil,Fish Oil 10/50 Tg,Omega 3 Fish Oil,10/50 Tg Fish Oil ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com