| Regrowth effects of stubble height on alfalfa in irrigated fields |
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| DOI：10.7606/j.issn.1000-7601.2007.04.36 |
| Key Words: alfalfa stubble height hay yield nutritive quality root weight over-wintering rate |
| Author Name | Affiliation | | YANG Heng-shan | College of Agronomy, Inner Mongolia University for Nationalities, Tongliao 028042， China | | SUN De-zhi | College of Agronomy, Inner Mongolia University for Nationalities, Tongliao 028042， China | | XIAO Yan-yun | College of Agronomy, Inner Mongolia University for Nationalities, Tongliao 028042， China | | ZHANG Hong-yu | College of Agronomy, Inner Mongolia University for Nationalities, Tongliao 028042， China | | ZHANG Rui-fu | College of Agronomy, Inner Mongolia University for Nationalities, Tongliao 028042， China |
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| Abstract: |
| In order to establish the clipping system of alfalfa in irrigated fields, the effects of stubble height were studied from 2003 to 2006 at Inner Mongolia University for Nationalities in Xiliaohe Plain. The results showed that, the plant height, the internode length, the root weight and over-wintering rate of 5 cm stubble height are all lower than those of 10 cm stubble height, but the branch number and the internode number are all higher than those of 10 cm stubble height. The nutritive quality of alfalfa was better under 10 cm stubble height. Compared with those of 10 cm stubble height, the hay yield of 5 cm stubble height was higher in the first two years, but was lower in the last two years, and the 4 years total yield was slightly lower. After 4 years of clipping, the population of 10 cm stubble height was 3.8 plant/m2 more than that of 5 cm stubble height. |
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