In Different Soil Substrates The Emei Centipedegrass Growth And Cold Hardiness Of Study

Studies On Effect Of Various Soil Substrate on Growth and Cold Resistance of Emei Centipedegrass LiXi (Department Of Grassland Science, Sichuan Agricultural University, Yaan, 625014, Sichuan Province, China) Abstract: Emei Centipedegrass has been experimented on five various soil substrate: stony soil, purple soil, beach soil, rubbish , coarse sand. Treatments were assigned in random plot design. The result showed as follows: 1. Average green period is 266 days. Emei Centipedegrass on beach soil substrate is the longest which is up to 272 days. 2. Emei Centipedegrass grows well in acidulous and neutral soil, K, volume weight and organic matter affect Emei Centi-pedegrass. 1 .2挆?1 .3g/cm3is the suitable volume weight. K is absent when content of plant tissue less than 5.55g/kg, Centipedegrass should be enhanced K in July and August. 3. Centipedegrass under beach soil treatment shows strong cold resistance, its lethal temperature (LT50) is the lowest,-2.74 揅 in September, -5.65 慍 in January. By SDS-PAGE, it is found that cold resistance is different from five various soil substrate through the number of protein bands and activity. Protein activity of beach soil treatment is the most active, but stony soil is the most inert, and moreover, number of protein bands miss one ,companng of other treatments. Protein 40 molecular weight about Emei Centipedegrass concentrate less than 43KD, Preliminarily concluding, molecular weight of COR in root collar is about 20.IKD-31K0 and less than 14.4KD.Both SOS-PAGE and electrical conductivity are effective ways to study cold resistance of Centipedegrass. 4. Under beach soil treatment, Emei Centipedegrass has the fastest turf formation speed, the best uniform. It is significant method. A conclusion can be drawn that beach soil and purple soil are the most distinguished to make Centipedegrass good.