Pruning time: walnut trees dormant pruning prone to injury flow and weaken the tree vigor, and even cause local branches withered, its pruning period before the autumn leaves fall or spring after the bud is the most appropriate. The best cuts are between autumn “equinox†and “cold dewâ€, which is good for wounds to heal early in the year. Pruning can also be performed in the winter 30 days after the fall to the 25th day before the bud to reduce the adverse effects on the tree.
Walnut trees are suitable for tree shape: At present, high-quality, early-maturing, thin-skinned walnuts mainly adopt three kinds of tree-shaped sparse layer-shaped, happy-shape and spindle-shaped. For varieties with good fertilizer and water conditions, thick soil layer, or strong growth potential, the planting density is small, and small crowns may be sparsely layered or spindle-shaped. On the contrary, they may be used for happy-shape or modified happy-shape.
Pruning method: 1. Sapling pruning points. The walnut tree saplings are in good nutrition, the shoots grow rapidly, and the crown expands year by year. At this time, pruning should pay attention to cultivating the main trunk, keeping the main branch, retaining the auxiliary branches, and slowly cutting the densely squeezed branches, legged branches, thin and thin branches, and within the canopy. Leave more results. 2. Promote the formation of a result. Stand erect and prosperous, pull flat and put slowly, ease the growth of branches, and promote the formation of the result. 3. Increase the amount of branches and culture results branches. Using a short cut method to increase the amount of branches; to slow-release method, the lateral branches of both sides to cultivate strong large and medium-sized branches. When truncated, the remaining branches should be short to prevent the emergence of baldness; for the old branches, they should be retracted in time; using the dormant buds, the canopy should be updated. 4. Improve the light in the crown. For dense branches, overlapping branches and crowns that grow in the canopy, competing branches and cross branches that grow in the canopy, properly retract or sparse. 5. Trim the upper branch and the lower branch. When the back branch is used as the main branch to extend the head, the main branch head should be higher than the side branches, and the main branch growth should be stronger than the side branch; the back branch should be removed in time. 6. Control the growth of the back branches and drooping branches. The walnut branches open at an angle; the growth of the back branches and the drooping branches and the growth of the back branches and both branches compete for nutrition. Therefore, it is necessary to control the back branches and sagging growth so as to avoid the phenomenon of shifting the resulting parts.
1. Considering the limitation of storage space and storage cost, as well as the fact that video recording in public places such as residential areas is a prerequisite for multi slot and a certain degree of clarity, video recording is generally deleted once a week or so. 15 days for general entertainment venues, 26 days for financial industry, and 3 months to half a year for banks, depending on the current venue regulations
2. The length of the storage time of the monitoring video is generally related to the following points: the capacity of the host's hard disk. Generally, a camera needs about 0.3G-0.5G of hard disk capacity for 24 hours of continuous video recording. Different systems have different parameters, the minimum is 0.15G/24 hours;
3. The number of cameras. The more cameras, the more capacity required. Also, the selection of the resolution and picture quality of the recorded picture will also affect the capacity required for video storage;
4. The video recording mode will also affect the space required for storage. The video recording mode is generally divided into [Mobile Video Recording] and [Continuous Video Recording]. The former means that the host starts to record when a moving object passes through the monitoring range, and does not record at other times. This can reduce the storage space required for video recording; On the contrary, continuous video recording is 24-hour continuous video recording.
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