Key points of cold season type lawn fertilization technology

Rational application of organic fertilizers and chemical fertilizers plays an important role in the establishment and maintenance of turf. Fertilizer can not only nourish plants, promote plant metabolism, improve turf quality and growth ability, but also improve soil structure, coordinate water, fertilizer, gas and heat conditions in soil, improve soil fertility, facilitate turfgrass growth and development, and enhance turfgrass The resistance of weeds and pests and diseases makes the lawn stable for a long time and maintains a good landscape. Scientific and rational fertilization, lawn grass should be at nutritional needs and different growing seasons, a reasonable supply of nutrients based on cool-season to improve the resistance of turfgrass.

A built turf generally used contain a certain proportion of organic matter in the soil, to improve soil structure, adding an appropriate amount of soil amendment, to form a large number of aggregate stability, and is advantageous in holding water permeable. The soil is also tested, including soil texture, pH, and nitrogen, phosphorus, potassium, and trace element components to provide the amount of fertilizer applied. Usually 30 to 40 g of compound fertilizer / m² administered to sheep or 5,000 kg / ha diammonium phosphate 200 kg affixing / ha, uniform applicator, and then buried in the soil deep plowing about 15 to 20 cm in.

Second, the management of the lawn 1. Spring fertilization spring cold season turfgrass growth rate. Fertilization should be based on phosphorus, potassium-based, applied in early spring as soon as possible, but not too much fertilizer, if it is too general to accelerate the growth of lawn grass, lawn frequently and consume large amounts of nutrients, resulting in decreased ability summering.

2. fertilize cool-season lawn in summer in hot and humid summer environmental stress, nitrogen fertilizer often increase the incidence of disease. When administered in conjunction with other management measures watering and pruning the regulation, a serious shortage of green lawn usually appear only in a small amount of nitrogen fertilizer or foliar application of urea, potassium dihydrogen phosphate, but the administration can promote the growth of turfgrass plant roots, culture robust Roots, thereby improving the disease resistance of the lawn .

　　 3. Autumn fertilization Autumn fertilization should be carried out in September , mainly based on urea. Apply 25 g/m2 of nitrogen, phosphorus and potassium in a ratio of 9 : 6 : 4 compound fertilizer, and then apply 10 to 15 g /m2 of urea, which can promote the recovery of turfgrass from the high temperature and high humidity in summer. to, in order to promote the accumulation of new tillers growth and nutrient, and to meet the growing needs fall lawn.

　　 4. Winter fertilization is to make the cold season lawn safe for winter, and it is very important to strengthen winter lawn fertilization . Before the lawn enters the freeze, it is necessary to add organic fertilizer, such as livestock excrement, charcoal and humic acid, and fill the winter water to ensure the safe wintering of the turf roots, and carry out proper soiling, sand or soil (the same structure as the flat bed) The mixture of soil and organic fertilizer is covered on the lawn, which can play the role of heat preservation, water holding and fertilizer supply.

Third, note 1. In addition to the application of organic fertilizer on the soil of the knot, can be added to the river sand.

　　 2. Fertilize should be uniform, do not make the color of the lawn produce speckle (especially horseshoe gold). Before fertilization of the lawn grass to be trimmed, immediately after fertilization, irrigation, fertilizer can quickly absorb.

　　 3. Newly-built lawn fertilization generally requires a small number of times to prevent a large amount of fertilization from causing damage to the lawn and a large loss of fertilizer.

　　 4. If excessive application of nitrogen fertilizer during the turf growing season will promote the rapid growth of turf grass stems and leaves , greatly increase the number of pruning, make the cell wall of turfgrass thin, the tissue is soft and juicy, and reduce nutrient storage, resulting in turfgrass heat, drought, cold and disease resistance and resistance to trampling reduced ability.