Study on the production performance of Italian ryegrassvarieties in Yangzhou region

The productive adaptability of 10 varieties of Italian ryegrass in Jiangsu Yangzhou region were studied in present study, and the traits related to performance and production from full range, such as growth rate, tillering capacity, leaf ratio, fresh yield were analyzed. The results showed that the ryegrass growing in winterfree field in the Yangzhou region could be cut three times during the growth period approximately 230 days; The first and second crop of the test varieties, from tillering to jointing then to booting showed slowfastslow of growth rhythm. In the third crop of test varieties, a fast growth rate was observed during tillering to jointing stage, but slow growth rate at the jointing to booting. There was significant difference of growth rate among tested species; and cluster analysis showed Angus 1, Double Barrel and Tetragol presented a high production, fast growth rate and higher tillering ability, indicating some good comprehensive properties, and suit for planting in Yangzhou region.