Mixtures of whipgrass with cool-season annual forages to extend the forage production season in south-west China

文献类型： 外文期刊

第一作者： Han, Jianguo

作者： Han, Jianguo;Yang, Chunhua;Chen, Lingzhi;Li, Xianglin;He, Feng

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期刊名称：TROPICAL GRASSLANDS （ 影响因子：0.224； 五年影响因子：0.409 ）

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收录情况： SCI

摘要： Whipgrass (Hemarthria compressa) cv. Guang yi is commonly grown in south-western China as forage for livestock but production during the late autumn-early spring period is limited. The objective of this study was to determine if oversowing small grains or ryegrass into whipgrass swards could extend the production season for the pasture, especially in late autumn and early spring. The study was conducted from 2005 to 2007 in Ya'an, Sichuan Province, China. Trit-icale (Triticosecale spp.) cv. Zhongsi 828, rye (Secale cereale) cv. Dongmu 70 and annual ryegrass (Lolium multiflorum) cv. Changjiang No 2 were broadcast in early September into whipgrass swards, which had been cut and disced. In late autumn (Harvest 1) , forage yields of all mixtures were 1.62 t/ha higher on average than that of whipgrass monoculture (yield 0.19 t/ha). In spring (Harvests 2-A), mixtures of whipgrass with annual ryegrass, triticale and rye produced 12.51, 10.67 and 10.16 t/ha, respectively, compared with 2.76 t/ha for whipgrass monoculture. The mixtures contained less than 40% whipgrass. Highest crude protein concentrations in autumn (186 g/kg) and spring (122-146 g/kg) were in pure whipgrass and the whipgrass-ryegrass mixture. In summer, virtually all available forage on all treatments was whipgrass, with yields in excess of 20 t/ha and crude protein concentration of 78 g/kg. This study suggests that ryegrass, triticale and rye can be successfully sown into whipgrass swards in autumn without the use of herbicides, to increase autumn-spring and total season forage production in the following year.

分类号： S5

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