In order to make the lawn safer over the summer, the prevention and control of turfgrass disease is the focus of turf maintenance and management at this stage. Zhao Xiaoyan, a senior engineer in charge of greening and conservation at the Beijing Summer Palace Management Office, found that compared with other areas, the cold-season turf that is mixed with wild lands in the farming and weaving maps area is rarely diseased.
Unexpected income from mixed broadcasting experiment
In 2003, the Summer Palace had conducted turf-mixing tests in some sections of the cultivating area. In the experiment, mixed seeds of cool-season grass seeds and ten kinds of wild land seeds such as bitter herbs, violet, diplodocus, and dandelion were mixed. Zhao Xiaoyan said that the mixed-sowing test at that time was mainly to observe the competition and succession between species in the lawn and wild land, so after the test, the lawn was trimmed and maintained. A few years later, there was only dandelion in the lawn, but it was unexpectedly discovered that this patch of lawn is not easy to get sick.
Analysis of the reasons for this is mainly the growth of some dandelions in the lawn. It is equivalent to isolating one breathable space in the cool-season turf, which has the same effect of perforating the lawn and effectively improves the ventilation and ventilation of the lawn. It helps to reduce the occurrence of diseases. “Before experienced old masters said, a few weeds on the lawn can reduce the incidence of diseases. If we screen the weed species, we can not only create a beautiful patchwork effect, but also reduce the incidence of turfgrass disease. Zhao Xiaoyan said.
The actual application focuses on selection
Zhao Xiaoyan pointed out that two points should be paid attention to in practical applications. The first is to choose the type of wild ground where the growth point is low. In spring and autumn, when turfgrass grows vigorously, the height of pruning and trimming is generally 5cm to 6cm, and species with higher growth points such as blue orchid and bitter must not be seen after pruning a few times. The dandelion has a low growth point and is very tolerant to trim. After the lawn is trimmed, the dandelion is well preserved.
"The second is to select the type of wild land that can control the breeding speed artificially." Applying a small amount of wild land with good ornamental effect can reduce the disease and benefit the growth of the turf, but for those species with strong root ability, especially at high temperatures. In high-humidity summer, once it invades the lawn, it will quickly spread the overall landscape effect that affects the lawn, and when it is severe, it will cause the entire patch of greenery to grow thick. The dandelion can control the number of its plants by adjusting the trim height. The specific approach is: After the flowering period of May Day dandelion is over, if you visually feel that the dandelion plants are too much, in the next few times when the lawn is trimmed properly, the number of dandelions will be reduced until the density is appropriate.
Nuts can generally be divided into two types: one is seeds, such as sunflower seeds, pumpkin seeds, peanuts, etc.; the other is tree nuts, such as pistachios, hazelnuts, cashews, walnuts, pine nuts, walnuts, chestnuts, almonds. And the macadamia and pecans that have been very hot in the past two years. These nut foods contain more protein, calcium and a variety of vitamins, which can provide the body with a variety of nutrients needed by the brain and body.
In general, a nut is a closed fruit classification of a nutrient-covered woody or leathery hard shell. The skin is hard and contains one or more seeds. It includes two types of tree nuts and fruit seeds, walnuts, chestnuts, pistachios, almonds, etc., melon seeds, which belong to the fruit seed class.
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