In recent years, the environmental protection awareness of the entire nation has been continuously enhanced, and the lawn has been a low-level color of the overall environment. The important functions of greening and beautifying the environment have been widely recognized. The number of introduced turfgrass species has doubled, and more and more green spaces have appeared in people. In front of it, the lawn industry has entered a period of great development.
The correct selection of species is half the success of turfgrass establishment. Selection of species should follow the following two principles:
Climate and environment adaptation
The principle of adaptability to climate and environment is the decisive factor in the selection of turfgrass species. According to the plant's response to climatic conditions and living environment, the lawn can be divided into two categories: cool season and warm season.
The optimum growth temperature of cool-season turf is 15°C-25°C, and its growth is mainly restricted by high temperature stress, duration of extreme temperature and arid environment. The cool-season turf is mainly suitable for planting in the northeast, northwest, north China, east China and Huazhong provinces in the north of the Yangtze River. The main features of the turfgrass are the long green period, the dark green color, and the fine management. There are many types available, including hundreds of varieties of over 40 species of more than a dozen genera such as Poa, Festuca, Lolium, Genus, Brome, and Puccinia.
Warm-season turfgrass is most suitable for the growth temperature of 25°C-35°C, and its growth is mainly limited by extreme low temperature and duration. Suitable for planting in the tropics, subtropical regions of China, and temperate regions in the central part of the country. Its main features are strong heat resistance, good disease resistance, and extensive management. Most species have a short green period, light green color, and fewer species are available for selection. , Including: Bermuda, Zoysia, Teffium, Buffalo and more than a dozen species of 20 species of nearly a hundred species.
With the continuous development of China's turf industry, the scientific and technological forces that have been put into it have gradually increased. In recent years, trial communities have been established throughout the country for the study of adaptability of turfgrass species, providing a reliable guarantee for the selection of suitable turfgrass species.
China's relevant research institutes and larger enterprises have introduced hundreds of grass cultivars from abroad and conducted multi-level and multi-channel screening for variety adaptability. The principle of adaptability of turfgrass climate and environment has been generally accepted.
Complementary advantages and the principle of landscape consistency
As the background color of the lawn, the uniformity of the landscape is more and more valued. For the turfgrass selection, following the principle of landscape consistency is the most difficult condition for the graceful lawn. In order to enhance the resistance of turfgrass to environmental conditions, the researchers proposed a mixed sowing method. The main advantage of mixed sowing is that the mixed population has a broader genetic background than a single population, and thus has a stronger adaptability to external conditions. There are differences in genetic composition, growth habits of light, fertilizer and water, soil adaptability and resistance to pests and diseases among different components of mixed sowing. Mixed groups have better performance in environmental adaptation and can achieve complementary advantages. . The proportion of the components of mixed sowing is constrained by the principle of landscape consistency.
There are two methods for mixed sowing: one is the mixing of different varieties within the species, for example, ornamental turf or turf rolls in northern China, commonly used in the combination of different varieties of Kentucky Bluegrass, and the components are commonly used in 3-4 varieties. The proportion varies with the variety characteristics; on the other hand, there is a mixture of different kinds of turfgrass species, such as the mixed combination commonly used in grassland turfgrass species: Tall Fescue + Kentucky Bluegrass, the proportion of which varies with the management level. Different, but first to meet the principle of landscape consistency, in this mixture of components, due to the denser leaf texture of Tall Fescue clustering characteristics, Tall fescue must be the main component of the mixed broadcast, its proportion is generally 85 Between 90% and 90%, the resulting lawn can achieve a landscape-like effect.
Perennial ryegrass is commonly used in mixed components to act as a pioneer plant. It germinates quickly, seedlings grow rapidly, can quickly cover the ground, form a partial shade, create a suitable environment for the germination of Kentucky Bluegrass seeds, and can inhibit the growth of weeds to a certain extent. In addition, perennial ryegrass is also used for winter reseeding of warm-season turfgrass, but the proportion of perennial ryegrass should not exceed that due to excessive perennial ryegrass that threatens the survival and growth of other components in the mixed crop. 50%.
Building a beautiful lawn is a complex system project. In addition to the scientific selection of species, it is also necessary to select a suitable planting time, a good method of processing the bed, and strictly implement the lawn maintenance management technology to obtain a beautiful lawn.
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