1. Disadvantages of paving grass blocks for lawn. At present, the method of spreading grass blocks is often used to breed lawns. This method is simple and convenient and easy to be accepted by people, but the problem is also obvious. In the process of lawn laying, strip turf with soil is transported from other places to the construction site. In order to ensure its survival rate, it often carries more soil and needs to be transported in a short time, otherwise it will dry up and die, which increases the transportation cost and reduces the production efficiency, which restricts the further expansion and development of lawn industry. 2. In the process of construction, the construction personnel do not follow the construction requirements. Lawn laying has strict requirements, so we must follow the maintenance requirements, otherwise the survival rate will be greatly reduced, and even a large number of deaths will be caused. When laying, the gap between turf blocks laid by construction personnel is not 0.5 cm as required, but random. Although the lawn was watered immediately after paving, it was not watered thoroughly, and the watering in the future did not keep up in time, resulting in a large number of lawns dying. (3) General methods of lawn maintenance As far as the current situation of lawn maintenance is concerned, most of them pay attention to the number of lawn plants and ignore the maintenance after the lawn is completed.

Management. After lawn planting, due to management lag or no management at all, many lawns are of poor quality, and soon decline or even die, resulting in unnecessary losses. The main reason is that the lawn is not well managed and maintained according to the specifications, especially in lawn fertilization and pest control. 1. Fertilization. The good growth of lawn needs a lot of nutrient elements, such as C, H, O, etc. These elements can be obtained directly from soil, air and water, but some elements, such as N, P and K, are far from enough and need to be compensated by fertilization, especially N element. At present, NPK compound fertilizer is widely used abroad, and Israel Lamla special fertilizer can be used. However, we are still at the level of organic fertilizer and single fertilizer, which is often time-consuming and can not meet the needs of lawn growth. 2. Pest control. For convenience and short-term effect, the use of chemical agents pollutes the environment, and at the same time causes a vicious circle, and pests produce antibodies, so it is necessary to use more toxic agents. In the long run, the pollution will be more serious and the ecology will be unbalanced.