summer heat to the cold season turf management brings all sorts of problems

These days all over the country, it was very hot, summer heat to the cold season turf management brings all sorts of problems. Cool-season lawns in the survival rate after the high temperature to become one of the challenges faced by the director of golf course. The most common symptoms of heat stress slow leaf growth, root weakened or lost. In most cases, the thermal stress does not directly lead to the death of the lawn.

But the lawn trampling resistance capacity under heat stress adversely affected. There are two types of thermal stress will affect the health of the lawn. Indirect long-term high temperature stress is the most common form. Lawn long in the environment exceeds the optimum growth temperature, may lead to reduced carbohydrate accumulation, resulting Lawn slow growth, decreased activity. Indirect high temperature stress will lead to the root reduce and death. Directly or special high temperature stress can lead to plant death by interfering with the function of plant cells. Soil temperature above the optimal growth than the ultra-high temperature harming plants. When average daily soil temperature exceeds 70 degrees Fahrenheit (21 Celsius) more than 50% of the cool season turf grass roots may die.

The University of Rochester in a controlled study, the researchers temperature maintained at 20, and then adjust the soil temperature. The results show that, under conditions of constant temperature of 20 degrees Celsius when the soil temperature was elevated to 21 degrees Celsius, creeping bentgrass root mass, length, and an activity. Direct high temperature stress can damage the plant cell membranes and proteins, however, turfgrass generally have certain physiological mechanism resistant to direct high-temperature injury. Usually cool season turf planting with little natural appears this ultra-high lethal soil temperature. Such a high temperature is generally caused due to human factors, such as sand on the green cover too thick or too long a time to cover up the lawn.

Control measures to reduce wear to high temperature stress were the following:

1 to enhance the height of the lawnmower, turf can increase the abrasion resistance. A dense lawn can better protect turf grass growing point from destruction. At the same time, the surface vegetation can also control the surface temperature increases.

When the lawn is in heat stress to reduce mowing frequency. Such as cut from double to single cut. At the same time should be avoided in daily high temperatures when mowing.

Before the arrival of the heat stress, the use of smooth rather than grooved tumbleweed. This helps to reduce the phenomenon of eating grass and turf wear.

4. Minimize duplication trim mode.

Rose out of the lawn for all kinds of operations, in order to reduce the degree of wear at the same location.

Reduction in high-temperature gas root cutting machine, the shallow vertical mowing the lawn under high temperature stress less damage.

7 to avoid excessive high temperature period covered sand.

8 reasonably irrigation. Not too much water at high temperatures.

9 Avoid excessive fertilization. Usually taken in hot weather foliar spray liquid fertilizer.