How to do a good job of planting trees and reducing costs

Problems in Afforestation Poplar and willow are easy to plant, grow fast and have a large crown area, which is irreplaceable by other tree species in terms of shading, heatstroke prevention, wind and sand fixation. So far, they have been the main afforestation tree species in the northern region, and have indeed made great contributions to increasing urban green quantity and improving ecological environment. However, in recent years, with most of these trees entering the mature stage, the negative effects caused by a large number of willow catkins are becoming more and more obvious, and the biological pollution caused by them has now become a major problem in grass-roots greening. The harm of catkins is mainly manifested in the following two aspects: First, it affects the environmental quality and does some harm to people's health. Flying catkins often fly into the eyes and nostrils of pedestrians, which makes people feel very uncomfortable, especially those who are allergic. Contact with catkins can lead to skin allergies, rashes and itching, and even aggravate respiratory diseases such as asthma and chronic bronchitis. Flying catkins can also carry and spread bacteria, causing inflammation of the nose and eyes. The second is endangering public safety, traffic safety and public facilities. Flocculation often blocks the radiator of automobile water tank, which makes the automobile easy to boil and stall; It can block the sight of pedestrians and vehicles, thus affecting traffic safety; Flying flocs are flammable substances, which can easily lead to fire when exposed to open flames; In addition, flying flocs will also affect the accuracy of some high-precision instruments. Thirdly, catkin is the biggest headache for the integration of sanitation in spring. On the one hand, the flying floc is very light, and it will fly when swept, which is difficult to clean; On the other hand, just after cleaning, a gust of wind blew over and covered the floor, which was too difficult to get up. Many people complain that the sheep flying on the ground are not cleaned, and the wind blows everywhere. In fact, it's not that you don't clean, but that you can't clean at all. Put forward the following suggestions: First, give willow "birth control" to avoid catkins flying all over the sky. Relevant urban management departments can choose to spray certain pollution-free inhibitory drugs on poplar, willow and other trees that produce flying flocs without producing inflorescences, so that they cannot produce tidbits. In this way, not only the original natural form of trees is preserved, but also the trees are protected from physical damage. Compared with physical cutting or pruning, spraying drugs also reduces the cost and saves resources to some extent. The second is to adjust measures to local conditions, adapt the land and trees, and engage in multi-tree greening. Governments at all levels can, according to the actual situation of local greening, change the way of selecting poplar and willow as greening trees in the past, and gradually choose cherry blossoms, zinnia and other tree species to green the environment. This can not only reduce the troubles of willow catkins in spring, but also form a beautiful landscape.