海晏县

海晏县生态现状及治理途径

Ecology Environment Status Quo and Control Ways in Haiyan County

青海省海晏县羔羊肝子病的病因诊断

Etiological Diagnosis of " Ganzibing " in Lamb from Haiyan County of Qinghai Province

海晏县麻黄科植物种类形态特征及经济用途

The morphological characteristics and the types of economic using of Ephedra plant in Haiyan County

海晏县棘球蚴病流行病学调查及综合防治报告

Report on Investigation of Epidemiology and Comprehensive Prevention and cure of Hydatidosis in HaiYan County

试验通过对海北州海晏县天然草地上土壤酶活性的测定，根据不同施肥量，对土壤脲酶、磷酸酶、蔗糖酶活性及其与施肥量的相关性进行了分析探讨。

The relationship between the enzymatic activity of grassland and different applying fertilizer on grassland was studied .

注：永久占用耕地面积主要集中在湟源县、海晏县、乌兰县、德令哈市。

Note : The per manent occupying cultivated area are mainly concentrated in Huangyuan County , Haiyan County , Malan County and Delingha City .