Overview of Golf Turf Quality Evaluation

Author:Ricdro

Turf quality is a comprehensive index to evaluate the pros and cons of turf. The quality of lawn is a reflection of the ecological function of lawn and also a reflection of landscape quality. The purpose and function of lawn construction are different, and the quality requirements are also different. Therefore, the evaluation should be combined with the purpose and function of the construction. The basic factors for evaluation include the uniformity, density, leaf width and touch, growth type, smoothness, color, and rigidity, elasticity, resilience, yield and resilience related to the quality of use of the lawn. The most important ones are Features required by the purpose of use

1. Evaluation factors of lawn appearance quality

1. Density refers to the number of individual turfgrass?per unit area. Density is the most important indicator of lawn quality, and dense carpet-like lawns are the most ideal. (It is not advisable to increase the planting density to achieve density) The density of turfgrass varies with factors such as heredity, natural environment and maintenance level. Certain varieties can obtain the highest lawn density, especially in low-pruning and large-scale fertilization, irrigation, no disease-causing organisms, and no insect infestation grassland. The density of the same variety also varies significantly due to cultivation methods, environment, and seasons. Adequate water, short crop pruning, application of nitrogen fertilizer, etc. can increase the density of the lawn. 2. Texture is a measure of leaf width and touch. It is generally considered that the narrower the leaves, the better the quality. Measured under the conditions of the same age and the same part, the leaf width is preferably 1.5～3.3mm. According to the leaf width of the turfgrass species and species, it can be divided into the following grades: a. Very fine-leaf fescue, villous bentgrass, African bermudagrass ; B, bermudagrass, bluegrass, weak bentgrass, pavement bentgrass, Zoysia ditchleaf; c, medium-leaf Zoysiagrass, annual ryegrass, small bran grass; d, broad meadow sheep Grass, Zoysia; e, extremely wide reed fescue, pennisetum, paspalum. 3. Color Color is a measure of the reflected light of the lawn, and is an important indicator for the visual assessment of lawn quality. The color varies according to different grass species and varieties, from light green to dark green to dark green. The appearance of yellow or chlorosis indicates that the turfgrass is affected by nutrient deficiency, disease or unfavorable factors. Dark color means that there is too much fertilizer, and turf grass will wilt or be an early sign of disease. The traditional method of evaluating lawn color is to determine the chlorophyll content. Colorimetric cards are also used in agriculture. The simplest method is to measure the amount of light reflection at a height of 1m above the lawn. The less the amount of reflected light, the higher the quality. 4. Uniformity is an evaluation of the flat surface of the lawn. High-quality lawns should be highly uniform, free from bare ground, weeds, pests and diseases, and have the same growth pattern. 5. Coverage refers to the ratio of the area covered by lawn grass to the total area. It can be determined by visual inspection or spot measurement. The greater the coverage, the higher the quality of the lawn. 6. Smoothness is the surface characteristic of the turf and an important factor in the quality of the turf of the golf course. A smooth lawn will not reduce the speed and duration of the ball rolling. It is the surface characteristic of the lawn and an important factor to measure the quality of the lawn of the sports field. It is especially important for the fruit collar of the golf course. It is generally evaluated based on the distance the ball rolls and whether it is deviated. At present, there is no perfect, fast and accurate method for evaluation.

2. Turf function quality evaluation

1. Rigidity and flexibility

Rigidity refers to the resistance of turfgrass leaves to external pressure. It is related to the abrasion resistance of lawns, and its size is affected by the chemical composition, moisture, temperature, plant size and density of lawn plants.

Softness is the opposite of rigidity. According to the strength and type of lawn utilization, softness is a favorable characteristic for lawns to meet certain utilization needs.

Zoysiagrass and bermudagrass turf has strong rigidity and resistance to trampling. Bluegrass and ryegrass have poor rigidity, so they are not resistant to trampling. 2, flexibility

Refers to the ability of turfgrass to return to its original form once the external force is removed. In the case of frost, the elasticity drops sharply, and the elasticity rises after the temperature rises.

3. Resilience

Refers to the ability of the turf to withstand impact without changing its surface characteristics. Affected by the growth medium of turfgrass, retaining a proper layer of withered grass can increase resilience. Soil type and structure are also important factors affecting resilience. The strong resilience of the football field lawn can prevent and reduce athletes' injuries.

4. Resilience (regenerative power)

Refers to the ability of turfgrass to restore its original state after being injured by pathogens, insects, traffic, etc. Usually reduces the resilience of turfgrass

The factors include: solid soil; too much or too little nutrient and moisture; unfavorable temperature; insufficient light; soil contains harmful substances, pests and diseases.

The tramp resistance of the lawn is a comprehensive reflection of the above indicators. 5, grass yield

Refers to the amount of grass cut when the lawn is mowed. It is a quantitative indicator of lawn growth. The yield of grass is affected by various cultivation factors such as fertilizer, irrigation and natural environmental factors.

6. The amount of rooting

Refers to the number of grass roots that grow during the growing season. The amount of roots can be determined by the soil drilling method. One is to look at the number of live roots, and the other is to look at the level of distribution. The roots are distributed deeply and grow normally.

Three. Influencing factors of lawn quality

The influencing factors of turf quality are: 1, the genetic characteristics of turfgrass plants

Including errors! The reference source was not found. Pest resistance; wrong! The reference source was not found. Abrasion resistance; error! The reference source was not found. Tolerance to high temperature, drought, low temperature frost damage, flooding, shelter, saline alkali; wrong! The reference source was not found. Regeneration ability after damage.

2. Restrictions on environmental conditions

Climate, soil, biology and other factors affect the growth and survival of turfgrass.

3. The external performance of turfgrass internal growth and development, physiological processes, and biochemical processes.