关键词: 多花黑麦草, 产量, 品质

Abstract:

In order to alleviate the tension of land resources and meet the needs of different farming systems and crop rotation systems, it is very important to screen fast-growing grass varieties with better production performance to meet the dual needs of food production and development of animal husbandry. Six early maturing type ryegrass varieties were selected, and the forage qualities and growth adaptabilities of different varieties were studied. The results show that all the six varieties grow fast in the early spring. The total growth periods of tested varieties are from 195 days to 200 days. The dry mass accumulations of different varieties are mainly concentrated in early spring, and the yields of first mowing take up 50% of the total dry mass production. The biomass yields significantly differ from different varieties. The variety of LM015 has the highest biomass yield, 12750 kg·hm^-2, followed by Waseaoba, 12532 kg·hm^-2, and Sachiaoba has the worst, 11542 kg·hm^-2. The ADF and NDF contents of forage increase with forage growing, whereas soluble carbohydrate content and in vitro dry matter digestibility decrease. The yields of total digestible nutrients have significant (P<0.05) or very significant difference (P<0.01) among different varieties. The total digestible nutrient yield of LM015 is 8770 kg·hm^-2, which is significantly higher than other varieties. Comprehensive analyses of forage yields and forage qualities indicate that LM015 has the best performance, and followed by Waseaoba. Both are suitable for cultivation as forage produce in Nanjing area.

Key words: Lolium multiflourum, Yield, Quality