| In order to further discuss the establishment of turf in southern transitional zone in our country, and to improve the turf performance traits in this region, the mono-varieties with excellent performance were mixed to establish turf in this test. The compatibility and competitive ability of each variety in the mixed compositions were analyzed. The performance were comprehensively graded. The data measured was comprehensively evaluated with obscure math, and was correlatively analyzed on the basis of final result.The seed selection in this experiment was carried on the basis of introduction experiment conducted by many turf researchers. Those mono-varieties with excellent performance selected by them were chosen as the seed needed.In order to avoid the influence caused by the climate change throughout a year, the field-testing were conducted in March of 2002 and 2003 in ChengDu. During this research period, the germinating date and turf formation date of each mono-variety and mixed composition were measured; The height, leaf width, tilling capacity, color, texture, resistance for the disease of each component in the mixed composition were measured in the germinating period; the width, color, texture, density and resistance for the disease were measured in the early period of turf formation and in the following year.Because the main problem in southern transitional zone turf mainly occurred in winter and summer, based on the average leaf width, color, density, coverage, resistance for the disease and texture, the mixture turf and the contrast of the single was graded.The results of field-testing showed as following: the germinating rate of mixture turf is affected by the germinating rate of the single variety. If the compatibility of different species is reasonable, a good transitional period will present in the germinating time of mixture turf. In this process, the avant-species' role as protector was well shown. If there were great difference in the germinating time of each component in the mixed composition, great stress would be imposed on the species, which germinated later. For example, Bent-grass imposes great pressure on Bluegrass and Bermuda in group9 (70% Bent-grass +30% Bermuda) and grouplO (70% Bent-grass +30%bluegrass).Through the analysis of compatibility and competition, the conclusion was obtained. The compatibility of two cool-season mixture turfs is not good in the germinating date and the early time of turf formation. Because little pressure was imposed on the establish variety-tall fescue, the two groups: group 1 (70%tall fescue+20%bluegrass+10% perennial ryegrass) and group4 (60%tall fescue +20% bluegrass +20% perennial ryegrass) perform well in winter andsummer.The compatibility of group6 (50% tall fescue +50% bluegrass) isn't good, especially one year after turf formation. The competition between two species isn't very hard. Bluegrass isn't suitable in summer because of it's low disease resistance.The compatibility of group3 (70% tall fescue +20% red fescue+10% perennial ryegrass) isn't good. There are two reasons for this result: one is the leaf width of red fescue is too slim; the other is the competitive ability of perennial ryegrass is better than red fescue in germination time. Because tall fescue is predominant in this group, the general score is high.The compatibility of group5 (50% bermuda+50% bluegrass) is good before and after turf formation. One year later, the compatibility declines. The competition between two kinds of turf grass is hard, especially in summer. The turf formation rate of the two species is slow, so the turf isn't good in the early time.The compatibility of group7 and group8 isn't good, especially one year later. Group7 is: 50% tall fescue+50% Bermuda and group8 is: 70% tall fescue +30% Bermuda. The competition between the two kinds of turf grass is intensive. It is stronger in summer than in winter. The general score is low, especially in winter.The compatibility of group9 (70%bent-grass+30% Bermuda) is good. One year later, t...
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