摘要
20 0 2年 ,在金沙江流域 -云南昭通地区彝良县海拔 2 0 0 0m的半山区进行了退耕还草试验 ,选用 9种牧草进行引种 ,并进行了不同草种组合的混播处理。 2 0 0 3年对产草量、株高、生长速度等生产性能指标进行了调查和分析。结果表明 ,9种禾本科牧草均能安全越冬 ,且各性状表现较好 ,均可作为半山区退耕还草的选用品种 ,尤其是苇状羊茅Festucaarundinacea ,无芒雀麦Bromeinermis(多福 )的长势和产量优异 ,其次为多年生黑麦草Loliumperenne,紫羊茅F rabra。牧草品种混播组合试验的结果表明 :白三叶Trifoliumrepens +多年生黑麦草的组合适应性较好 ,白三叶 +草地早熟禾Poapratensis的产量较好。退耕还草不仅提高了经济效益 ,在当地干旱多风的自然条件下 ,还起到稳定保水、保肥、防风。
The experiment of grasses rehabilitation from crop field was conducted in 2002 in Jinsha river basin which was located in Yiliang county of Zhaotong distict Yunnan provine. The sites were 2000m above sea level. 9 species and mixture combinations were used in the trials. The productive capacity such as above-ground-biomass, plant height and growing rate were analyzed in the year of 2003. The results showed that 9 species could survive from winter. These grasses had an advantage in productive characters and can be used as the species of planting grass in the local conditions. Festuca arundinacea F. and Promus inermis leyss B. were better than Lolium Perenne L. and Festuca rabra in the characters of growth and yields. The result showed that the combinations of Trifolium repens L. +Lolium Perenne L. had an advantage in adaptation and the combinations of Trifolium repeens L. +poa pratensis L. had an advantage in the vegetable yield production. The eco-environmental benefits of the cropland conversion was remarkable under the dry and windy conditions because the vegetation of the grassland have the ability of continuable , benign and cyclical hold water, thus to protect fertilizer and reduce the soil erosion.
出处
《草业科学》
CAS
CSCD
2004年第12期23-27,共5页
Pratacultural Science
关键词
退耕还草
引种
混播组合
introduction of grassland rehabilitation from crop field
grasses
combination of mixed species.
