Studies And Assessment On The Character On The Use Of Turf Of Poa Pratensis L.cv. QinHai

Through to studies and assessment on the character on the use of turf of wildly and domesticates variety Poa Pratensis L.cv.QinHai, detail elaborates the each performance of the Poa Pratensis L.cv.QinHai as the lawn grass variety cultivated in QinHai and XiZang alpine area, and thorough analysis the suitable and feasibility, so that we can lay the foundation for its widespread promoted and application in the local area.1. The trial carries on in the separately two areas, which have bigger elevation span and remarkable difference in the natural environment(Qinghai Province GuoLuo Tibetan nationa, elevation 3780 m; Xining Beichuan, elevation2295.2 m). At the same time,this experiment also increase the 5–years- Poa Pratensis L.cv.QinHai as the observation object, to further supplement explain the character on the use of turf of Poa Pratensis L.cv.QinHai, so that we could avoid the limitations of the same year data cannot explain certain phenomena.2. As wildly domesticates variety, the germination percentage of the Poa Pratensis L.cv.QinHai is 73.25%, although the germination percentage is not very high, but in fact, the seed has strongly living ability ; Moreover, the Poa Pratensis L.cv.QinHai also has a higher purity (above 90%) and the rate of seedling emergence, regardless in inside or outside, the rate of seedlings emergence between the Poa Pratensis L.cv.QinHai and midnight is not certainly remarkable(F﹤F0.05). The above several points all conform to the condition which the fine lawn seeds goes into storage.3. Regardless in the type place one or the type place two, the Poa Pratensis L.cv.QinHai can success survive in the winter under the local surroundings, the surviving rate reaches above 70%, and the growing trend obviously to be good than the first year after turn green at the next year; and the midnight died because of which can not success survive in the winter at the alpine surroundings(surviving rate is 0). So, whether success survive in the winter under the local surroundings become the key when we choice the construct seeds and construct turf successfully. Moreover, the Poa Pratensis L.cv.QinHai has a longer green period, it respectively achieves about 160 day and 210 days between the type place one and the type place two.4. The single broadcasts Poa Pratensis L.cv.QinHai have the good characteristic of both soft texture and uniformity, but the color is shallower because of the lower content of chlorophyll; Relatively ,the mix between Poa Pratensis L.cv.QinHai and Festuca sinensis Keng. Cv. QinHai, have a good performance at the texture, uniformity or density and so on each character than the single broadcasts. Regardless single or mixes, the each character of the turf performance is better at the lower stubble high(5cm,8cm) and suitable mow frequency(10d/time).5. The difference of the rate of the root grips speed is not to be certainly remarkable(α﹤0.05) at each treatment in the two samples; the rate of the root grips in the type place two is obviously higher than in the type place one(F﹥F0.05);Speaking of the tiller, the difference is not certainly remarkable(α﹤0.05)at different treatments, there is not remarkable difference between the type place one and type place two(F﹤F0.05). Various factors has litter influence to the tiller, but actually has a more obvious influence to the rate of the tiller speed, The management measure under the low stubble and high frequency(stubble5cm,mow frequency 7 d/time ) is helpful to tiller, the rate of the tiller speed is higher than at the level of the high stubble and low frequency.6. There is real straight line correlation among the regeneration speed ,the date ground biomass and the accumulation growth quantity, and its relativity is consistent between the type place one and type place two.7. 5-years- Poa Pratensis L.cv.QinHai have soft and thin leaves, and its texture has not remarkable difference(P﹥0.05)compare with the newly single broadcasts Poa Pratensis L.cv.QinHai; Regardless the newly turf or 5-years- Poa PratensisL.cv.QinHai, its roots mostly densely covered in20㎝～30㎝ at the turf later period, and have not remarkable difference ( P﹥0.05 ) . Moreover, relatively says, lower intensity mow(stubble11㎝,mow frequency 13 d/time) is more advantageous to the growth of the 5-years- Poa Pratensis L.cv.QinHai than high intensity mow.