青海环湖地区多年生牧草与一年生作物混播效果比较研究

对一年生作物和多年生牧草混播条件下 ,对多年生牧草的栽培进行了研究 ,并通过不同多年生牧草生产性状的差异分析 ,筛选出最优的一年生保护作物。初步研究结果表明 ,在青海环湖地区草原性气候区土壤缺乏灌水的条件下 ,油菜对多年生牧草第 1～ 2年生长的影响最小 ,其次是对燕麦、青稞的影响最大。无芒雀麦和垂穗披碱草受作物的平均影响程度显著高于中华羊茅和多叶老芒麦 ,中华羊茅和多叶老芒麦与一年生作物混播的效果更好。播种当年保护作物可有效抑制杂草的生长 ,但第二年春夏加强草地除杂管理仍是保证多年生牧草播种成功的关键措施

Study on the Mixed Sowing of the Perennial Forage and Annual Crop in Qinghai Lakeside

The cultivation technique of the perennial forage is researched under the mixed sowing system.According to the discrepancy analysis of the productivity of the different perennial forage ,the optimal annual protective crop is selected.The study shows that there is a great deal effects of the annual crops on the growth of the perennial forages in the first and second year under the condition of lack of irrigation and the steppe climate on Qinghai Lakeside.The effect of Brassica juncea on the growth of the perennial forage is the least,Avena sativa the second ,and Hordeum sativum the third.And there is higher effect of the annual crop on Bromus inermis and Elymus nutans than Festuca sinensis and Elymus sibiricus.The annual crop can effectively inhibit the weed,but the control of weeding in spring and summer in the second year is also the key measures to make sure the growth of the perennial forage.