河北坝上天然割草地补播豆科牧草早期建植的研究

为研究河北坝上天然割草地补播不同品种豆科牧草早期建植情况,试验选择沙打旺(Astragalus adsurgens)、黄花草木樨(Melilotus officinalis)、达乌里胡枝子(Lespedeza davurica)、箭筈豌豆(Vicia sativa)、紫花苜蓿(Medicago sativa)、小叶锦鸡儿(Caragana microphylla)6种豆科牧草在河北坝上天然割草地进行补播,对补播牧草当年幼苗生长情况进行研究,结果表明:小叶锦鸡儿出苗率及存活率最高,分别为60%和92%。紫花苜蓿、箭筈豌豆幼苗株高最高,分别为13.34和13.74cm;二者平均相对生长速率最大,分别为0.160cm·d^-1和0.179cm·d^-1;达乌里胡枝子出苗率和存活率最低,分别为6.67%和0%。天然割草地补播豆科牧草,其中紫花苜蓿和箭筈豌豆早期建植能力最强,其次是小叶锦鸡儿,达乌里胡枝子早期建植能力最差。

Study on Early Establishment of Reseeding Forage Legumes into Natural Mowing Grassland in Bashang of Hebei Province

In order to study early establishment of reseeding different varieties of forage legumes into natural mowing grassland in Bashang of Hebei province, six forage species containing Astragalus adsurgen、Melilotus officinalis,Lespedeza davurica,Vicia sativa,Medicago sativa,Caragana microphylla were reseeded into natural mowing grassland and the seedling growth in the first year was observed. The results showed that the germination and survival rate of Caragana microphylla was highest, 60% and 92% respectively. The height of Medicago sativa and Vicia sativa were the highest, 13.34 cm and 13.74 cm, respectively, and their average relative growth rate were the greatest, 0.160 cm·d^-1 and 0.179 cm·d^-1, respectively. The germination and survival rate of Lespedeza davurica were the least, 6.67% and 0% respectively. As a result, when natural mowing grassland was reseeded the forage legume, Medicago sativa and Vicia sativa were the best, Caragana microphylla secondly, and Lespedeza davurica the worst.