Studies On The Characters On The Use Of Turf Of Poa Pratensis L. Cv. Hybrid

The Poa pratensis L. cv. Hybrid is the lanzhou institute of animal and veterinary pharmaceutics sciences in 2003 with the introduction in the United States, a new high grass lawn. This article through to the Poa pratensis L. cv. Hybrid and the turf planted widely performance of the Park Bluegrass,the Saber Bluegrass,the Bugby Bluegrass,the Farway Perennial,the Legend Red Fescue, and the Houndog Tall Fescue six kinds of common turf varieties were compared with in the characters on the use of turf, analysis and evaluation on Poa pratensis L. cv. temperate semi-humid regions in north China with the advantages and disadvantages of the characters on the use of turf, explore its growth potential and regularity in China, for its success and application were able to lay the foundation.The main results are as follows:1. As the second generation of the Poa pratensis L. cv. Hybrid, it finished one growth cycle from seeding in 2007 August 17 and seeded on June 12, 2008. The one growth cycle spent 301 days and green period is 315 days.the Poa pratensis L. cv. Hybrid seeds seed yield reached 225 kg/hm2 in 2008. Practice has proved, the Poa pratensis L. cv. Hybrid in temperate semi-humid region of northern China normal growth and maturity, the seed of China turf grass seeds to realize localization of solid foundation.2. The Poa pratensis L.cv.Hybrid get the highest mark (4.6) in the comprehensive evaluation system for 9 indexes of the turf characters,which including the turf density, the turf exture, the turf color, the turf uniformity, the green period, the turf coverage, the turf strength, the turf elasticity and the tiller number. Blade is soft and moderate, green color and luster, establishment grass layer even and neat, the green period is longer,the tillering ability is stronger. The Poa pratensis L.cv.Hybrid than other several varieties of exterior effect is compared. It is used as an ornamental turf, recreation and sports turf grass planting the building.3. One of the advantage of the Poa pratensis L. cv. Hybrid is slow-growing. The average incerment of the advantage of the Poa pratensis L. cv. Hybrid is 0.58 cm for May 2008. The Farway Perennial Ryegrass is 0.90 cm and the Houndog Tall Fescue is 1.39 cm. It has an obvious differences in the average incerment. After a slow growth turf establishment determines the turf is low cutting frequency, the Poa pratensis L.cv.Hybrid its slow excellent characteristics on unicast or mixed turf would extend the lawn clip period, lower the cutting frequency.It can reduce the cost of maintenance.4. One of the advantage of the Poa pratensis L. cv. Hybrid is drought-resistant ability. Its leaf has not wilting in the summer high temperature form june to september in 2008. The changes of relative leaf water content,proline content,malondialdehyde(MDA) and soluble sugar content(SS) of all of 7 varieties are measured and analyzed on the laboratory. The changes of relative leaf water content and malondialdehyde(MDA) content of the Poa pratensis L. cv. Hybrid are lower(85.56 %,0.0025μmol/g). The proline and soluble sugar content of the Poa pratensis L. cv. Hybrid are higher(81.5634μg/g and 4.5063 %). In the field observation, mainly in the unicast of the Poa pratensis L. cv. Hybrid turf area can reach 20-25 days of water cycle and maintain normal growth, than conventional lawn to about 10 days. In the grass maintenance management process it will greatly reduce the frequency with water turf, the variety of the gene is our quality drought resistance breeding turf is one of the important breeding materials, this also is the development of China turf grass industry to solve the contradiction with the water provides a good direction.5. One of the advantage of the Poa pratensis L. cv. Hybrid is cold-resistant ability. The half of leaf can keep green in the wintering period , the overwintering percentage can get 90 % and the green period can get 315 days in the cold winter in 2007 in the observation. The green period of the Poa pratensis L. cv. Hybrid is more than other several varieties of bluegrass compared to 15 days. In the winter of low temperature or northern region, the Poa pratensis L. cv. Hybrid built a turf grass planting can greatly improve the appearance quality.6. There are 4 diseases and insect pests phenomenon in the growth cycle in the field plot. The average infection grade of the Poa pratensis L. cv. Hybrid is 1.75. The pest resistance of the Poa pratensis L. cv. Hybrid s is best in the bluegrass varieties, but is lower than other varieties.