【摘要】 本文研究了播种量对鹰咀紫云英产量、茎叶比、草丛结构和根系生物量的影响。结果表明,不论是生活第二年还是第三年,其产草量均以播种量2斤/亩为最高,分别为5534斤和9734斤/亩(鲜草);而种子产量则以播种量1.34斤/亩为最适,再增加播种量反而使种子产量下降。鹰咀紫云英的叶片所占比例随播种量减少而增加,而鲜干比却在减少,其草丛结构图形呈纺锤形。根量(包括根颈)随深度加深急剧减少,60%以上分布在0—20cm土层中,尤以播种量2斤/亩最为突出,高达86%。通过对鹰咀紫云英干草的化学成分和氨基酸含量的分析表明,它是一种优良的蛋白质饲料,其营养价值可以与紫花苜蓿相媲美。更多还原

【Abstract】 The effects of seeding rates on yield, leaf-stem ratio, sward structure and root biomass of chickpea milkvetch (Astragalus cicer L.) were studie. The results showed that the highest, yield (fresh) occurred with the seeding rate of 2 jin/mu in the second and third growing season, 5534 and 9734 jin/mu, respectively. The seeding rate of 1.34 jin/mu mas the best for harvesting seeds and seed yield declined as the seeding rate increased. The leff-stem ratio of chickpea milkvetch increased as seeding rate decreased, while the fresh-dry ratio had a contrary tendency. Its sward structure graph was just like a spindle. Root biomass (including crown) decreased sharply with the soil depth and more than 60％ of it by weight occurred at 0-20cm depth. When the seeding rate was 2 jin/mu, it could reach as much as 86％. Analyses of the chemical compositions and contents of amino acids in hay indicates that chickpea milkvetch is a high-quality protein forage and its nutritive value is as good asthat of alfalfa.更多还原